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Simulation-based Determination of Relative Permeability in Laminated Rocks

Mohammad H. Sedaghat, Kirill Gerke, Siroos Azizmohammadi, Stephan K. Matthai
<span title="">2016</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/lm2bbv3vfbgafhrpg542lqv47i" style="color: black;">Energy Procedia</a> </i> &nbsp;
Reservoir simulation using the extended Darcy's law approach requires relative permeability curves derived either via analytic saturation functions (Corey models etc.) or from special core analysis (SCAL). Since such experimental exploration of the space of influential parameters (pore geometry and wettability) is costly and time consuming, establishing ways to extract ensemble relative permeability from numerical simulation, kri, over the entire range of water saturation is highly desirable.
more &raquo; ... this work, a Steady State Saturation Variation (SSSV) technique is proposed. It computes ensemble kri(sw) for layered rocks when both capillary and viscous forces are strong.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.egypro.2016.10.041">doi:10.1016/j.egypro.2016.10.041</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/zsd3jqmi6bakdpcpw37lqrc6qu">fatcat:zsd3jqmi6bakdpcpw37lqrc6qu</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190323165648/https://core.ac.uk/download/pdf/82177331.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/6f/ad/6fad9384a52fa9015c447dad4a59ac0ad7fe8b0d.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.egypro.2016.10.041"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> elsevier.com </button> </a>

Simulation of the Infiltration of Fractured Rock in the Unsaturated Zone

Luat Khoa Tran, Stephan Konrad Matthai
<span title="2021-10-01">2021</span> <i title="MDPI AG"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/smrngspzhzce7dy6ofycrfxbim" style="color: black;">Applied Sciences</a> </i> &nbsp;
., Matthäi [5] , Matthäi et al. [6] ).  ...  [16] , Council [17] , Matthäi and Belayneh [18] , McCallum et al. [19] ).  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/app11199148">doi:10.3390/app11199148</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/j5lu7bdi5rgd3fp53friijrfbq">fatcat:j5lu7bdi5rgd3fp53friijrfbq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20211006210125/https://mdpi-res.com/d_attachment/applsci/applsci-11-09148/article_deploy/applsci-11-09148.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/06/cc/06cc9534f193e72e44e21d9777c3f55a80b7d031.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3390/app11199148"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> mdpi.com </button> </a>

Self-Organizing Fluid Convection Patterns in an en Echelon Fault Array

James W. Patterson, Thomas Driesner, Stephan K. Matthai
<span title="2018-05-28">2018</span> <i title="American Geophysical Union (AGU)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/wulq43nvfbff7hppzu4u6xyaki" style="color: black;">Geophysical Research Letters</a> </i> &nbsp;
We present three-dimensional numerical simulations of natural convection in buried, vertical en echelon faults in impermeable host rock. Despite the fractures being hydraulically disconnected, convection within each fracture alters the temperature field in the surrounding host rock, altering convection in neighboring fractures. This leads to self-organization of coherent patterns of upward/downward flow and heating/cooling of the host rock spanning the entire fault array. This "synchronization"
more &raquo; ... effect occurs when fracture spacing is less than the width of convection cells within the fractures, which is controlled by fracture transmissivity (permeability times thickness) and heterogeneity. Narrow fracture spacing and synchronization enhance convective fluid flow within fractures and cause convection to initiate earlier, even lowering the critical transmissivity necessary for convection initiation. Heat flow through the en echelon region, however, is enhanced only in low-transmissivity fractures, while heat flow in high-permeability fractures is reduced due to thermal interference between fractures. Plain Language Summary Fractures and faults in the subsurface may, under the right conditions, allow water to naturally circulate, with hot water rising and cold water sinking. This water circulation heats or cools the host rock within some distance from the fracture. We show that the resulting temperature change affects water circulation in nearby fractures and may form large-scale patterns of heating and cooling, even when the fractures are disconnected. The primary factors controlling this interaction are the fractures' ability to facilitate fluid flow (permeability) and the spacing between them. Fluid flow rates increase when fractures are closely spaced, but total heat flow through the fractures may increase or decrease, depending on fracture permeability. Understanding this behavior helps us to better understand how fluid moves underground and may aid site selection for future geothermal energy projects.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1029/2018gl078271">doi:10.1029/2018gl078271</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/an7ow4axtjaj5jg3k6pf57cadu">fatcat:an7ow4axtjaj5jg3k6pf57cadu</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210715003118/https://agupubs.onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2018GL078271" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/88/75/887531f2181a02a154c1cb0e0f7ccb08c81daf05.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1029/2018gl078271"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Stress Influence on Fracture Aperture and Permeability of Fragmented Rocks

Hossein Agheshlui, Mohammad H. Sedaghat, Stephan Matthai
<span title="">2018</span> <i title="American Geophysical Union (AGU)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/zont6id3pjcfrnvyd5wpwl6vrm" style="color: black;">Journal of Geophysical Research - Solid Earth</a> </i> &nbsp;
For this, the fractures were represented by lower dimensional elements compared to the matrix (Stephan K. Matthäi & Nick, 2009; Paluszny et al., 2007) .  ...  A linear representation, lower dimensional elements compared to the matrix, was used for fractures as it is used in DFM models (Stephan K. Matthäi & Nick, 2009; Paluszny et al., 2007) .  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1029/2017jb015365">doi:10.1029/2017jb015365</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/vhyw3drchbglzi7iuz3hlmohse">fatcat:vhyw3drchbglzi7iuz3hlmohse</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200309220008/https://espace.library.uq.edu.au/data/UQ_dba853c/UQdba853c_OA.pdf?Expires=1583791270&amp;Key-Pair-Id=APKAJKNBJ4MJBJNC6NLQ&amp;Signature=UqYFaPq5QwQyZv1HgBPQ-4zIth1JOaDVg2K8PbtZxAkAemMVaYZMLbUsS3VUkpZGOnhoMRGLJdh~bNpYjLR36EisxgxBh-g1-EfOxpM2lkkfdxGYnaut6I6XNTW0Q95Nw3Mae6~o4vp-DJ-o4UfydW4lRi~gc1lBds5t8nIVgExPiEmM4ybxf2eodSiVW~j-sJx086lRg2ORvNxh5DS8kdh9bgr46OIyWcm~l6CgSO24EAgf9j7NSqUf9YeCQls8FrL3kwUolyZ13QVZ~~EHWelDClOfCBMsx7rYAKInICX3hSwcB-4tIsweAHXCkxKbjV8Z7tqV6NuN2x5SSkyhXA__" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/a2/eb/a2eb7ee828374ed176a27fbc719dedab33d38f50.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1029/2017jb015365"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Estimation of hydraulic anisotropy of unconsolidated granular packs using finite element methods

Lateef Akanji, Ghasem Nasr, Stephan Matthai
<span title="">2013</span> <i title="Multiphysics"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/2jontysw6fgjrboilftxwc65gu" style="color: black;">International Journal of Multiphysics</a> </i> &nbsp;
The effect of particle shape and heterogeneity on hydraulic anisotropy of unconsolidated granular packs is hereby investigated. Direct simulation was carried out on synthetically generated spherical, aspherical, ellipsoidal (aspect ratio of 2 and 3) and lenticular samples. Single phase Stokes equation was solved on models discretised on finite element geometries and hydraulic permeability computed in the horizontal and vertical directions to estimate the degree of anisotropy. The spherical and
more &raquo; ... spherical packs with varying degrees of particle shapes and heterogeneities are virtually isotropic. Ellipses with aspect ratios 2 and 3 have higher anisotropy ratios compared to the spherical and aspherical geometries while the lenticular geometry is the most anisotropic. This is attributable to the preferential alignment of the grains in the horizontal flow direction during random dynamic settling under gravity.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1260/1750-9548.7.2.153">doi:10.1260/1750-9548.7.2.153</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ntdszvynhfgrflw5kr3ali5uje">fatcat:ntdszvynhfgrflw5kr3ali5uje</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170922010431/http://journal.multiphysics.org/index.php/IJM/article/download/231/223" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/7a/4b/7a4bd896f4816968282e446c4c9ef843bbacfef9.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1260/1750-9548.7.2.153"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

Simulation of multiphase flow in fractured reservoirs using a fracture-only model with transfer functions

Evren Unsal, Stephan K. Matthäi, Martin J. Blunt
<span title="2009-11-13">2009</span> <i title="Springer Nature"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/np4a3jqbsbai5nxwbojogpy53a" style="color: black;">Computational Geosciences</a> </i> &nbsp;
We present a fracture-only reservoir simulator for multiphase flow: the fracture geometry is modeled explicitly, while fluid movement between fracture and matrix is accommodated using empirical transfer functions. This is a hybrid between discrete fracture discrete matrix modeling where both the fracture and matrix are gridded and dual-porosity or dual-permeability simulation where both fracture and matrix continua are upscaled. The advantage of this approach is that the complex fracture
more &raquo; ... y that controls the main flow paths is retained. The use of transfer functions, however, simplifies meshing and makes the simulation method considerably more efficient than discrete fracture discrete matrix models. The transfer functions accommodate capillary-and gravity-mediated flow between fracture and matrix and have been shown to be accurate for simple fracture geometries, capturing both the early-and late-time average behavior. We verify our simulator by comparing its predictions with simulation results where the fracture and matrix are explicitly modeled. We then show the utility of the approach by simulating multiphase flow in a geologically realistic fracture network. Waterflooding runs reveal the fraction of the fracture-matrix interface area that is infiltrated by water so that matrix imbibition can occur. The evolving fraction of the fracture-matrix interface area turns out to be an important characteristic of any particular fracture system to be used as a scaling parameter for capillary driven fracture-matrix transfer.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s10596-009-9168-4">doi:10.1007/s10596-009-9168-4</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/utuwb3jnwzdkdfoq4yxhjato6y">fatcat:utuwb3jnwzdkdfoq4yxhjato6y</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170809030128/http://lya.fciencias.unam.mx/pablo/misdocs/reservoir/simulation_fractured_reservoirs.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/0c/f4/0cf47b2f3fa303a3624c516245eab113d039b2a2.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s10596-009-9168-4"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> springer.com </button> </a>

Numerical study of the effects of particle shape and polydispersity on permeability

Xavier Garcia, Lateef T. Akanji, Martin J. Blunt, Stephan K. Matthai, John Paul Latham
<span title="2009-08-26">2009</span> <i title="American Physical Society (APS)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/nuk2stxzvvhf7ljciu325kj77m" style="color: black;">Physical Review E</a> </i> &nbsp;
We study through numerical simulations the dependence of the hydraulic permeability of granular materials on the particle shape and the grain size distribution. Several models of sand are constructed by simulating the settling under gravity of the grains; the friction coefficient is varied to construct packs of different porosity. The size distribution and shapes of the grains mimic real sands. Fluid flow is simulated in the resulting packs using a finite element method and the permeability of
more &raquo; ... he packs is successfully compared with available experimental data. Packs of nonspherical particles are less permeable than sphere packs of the same porosity. Our results indicate that the details of grain shape and size distribution have only a small effect on the permeabilty of the systems studied.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1103/physreve.80.021304">doi:10.1103/physreve.80.021304</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/19792116">pmid:19792116</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/dhwcj7zpzfbo3gdnd7yghmilvq">fatcat:dhwcj7zpzfbo3gdnd7yghmilvq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170813160351/https://workspace.imperial.ac.uk/earthscienceandengineering/public/external/Research/PERM/Garcia%20et%20al%20-%20PRE%202009.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/7f/d7/7fd70d36184c2876b172a10bcb9e889715cabb7f.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1103/physreve.80.021304"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> aps.org </button> </a>

Finite Element-Based Characterization of Pore-Scale Geometry and Its Impact on Fluid Flow

Lateef T. Akanji, Stephan K. Matthai
<span title="2009-04-29">2009</span> <i title="Springer Nature"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/xdgsnft55ffrtol2o5ytcjt7qu" style="color: black;">Transport in Porous Media</a> </i> &nbsp;
All computations were carried out using Complex System Modeling Platform, CSMP++ (Matthai et al. 2004 )-an object-oriented finite element-based package for modeling complex geological processes.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11242-009-9400-7">doi:10.1007/s11242-009-9400-7</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/vrpzd6k5gzh3zaalp725jneta4">fatcat:vrpzd6k5gzh3zaalp725jneta4</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20140712052703/http://stephan-matthai.com:80/pdfs/AkanjiMatthai09_TIPM.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/8b/98/8b9847986c4955025095d3bff49e23f9cb1c4f49.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11242-009-9400-7"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> springer.com </button> </a>

Transport of water and ions in partially water-saturated porous media. Part 3. Electrical conductivity

André Revil, Abdellahi Soueid Ahmed, Stephan Matthai
<span title="">2018</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/3waavli5kveifkzo3ootdhdgs4" style="color: black;">Advances in Water Resources</a> </i> &nbsp;
Matthai). corresponds to a distinct sample, all the sample being from the same facies (e.g., Winsauer, 1952 ) .  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.advwatres.2018.08.007">doi:10.1016/j.advwatres.2018.08.007</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/kbf4kqxrvfhafnzrevmbusk3aa">fatcat:kbf4kqxrvfhafnzrevmbusk3aa</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210429112025/https://hal.archives-ouvertes.fr/hal-02324271/file/2018-ADWR-Transport%20part%203.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/30/c3/30c36a58d3b597862f5956abd566c74215f9d7c5.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.advwatres.2018.08.007"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> elsevier.com </button> </a>

Does the symmetry of absolute permeability influence relative permeability tensors in naturally fractured rocks?

Mohammad Sedaghat, Siroos Azizmohammadi, Stephan K. Matthäi
<span title="2019-08-22">2019</span> <i title="Springer Science and Business Media LLC"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/vfsama2ljna5ro463yzdjfyyk4" style="color: black;">Journal of Petroleum Exploration and Production Technology</a> </i> &nbsp;
This affects fracture-matrix counter-current imbibition flux by altering the balance between viscous, capillary, and gravitational forces (Matthai et al. 2012; Matthai and Nick 2009) which makes the  ...  Non-monotonic relative permeability functions have been reported in the literature (Matthäi et al. 2007 ).  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s13202-019-00756-9">doi:10.1007/s13202-019-00756-9</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/rhuqyas2lzhnramyu3smw7n4dm">fatcat:rhuqyas2lzhnramyu3smw7n4dm</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200210223823/https://link.springer.com/content/pdf/10.1007%2Fs13202-019-00756-9.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/4c/15/4c1527c28f3bd8028917f80055d4e2c3f4dd36f6.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s13202-019-00756-9"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> springer.com </button> </a>

Numerical modeling of discrete multi-crack growth applied to pattern formation in geological brittle media

Adriana Paluszny, Stephan K. Matthäi
<span title="">2009</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/srgjiohyzbh7de6r3bvnz34vtq" style="color: black;">International Journal of Solids and Structures</a> </i> &nbsp;
., 2007; Matthai et al., 2005 Matthai et al., , 2007 .  ...  Matthäi / International Journal of Solids and Structures 46 (2009) 3383-3397  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.ijsolstr.2009.05.007">doi:10.1016/j.ijsolstr.2009.05.007</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/kfoywe47i5g3vbw4fpddqca62m">fatcat:kfoywe47i5g3vbw4fpddqca62m</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190314094431/https://core.ac.uk/download/pdf/81995202.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/4a/75/4a75d018766b06744dfb1ee1405342123b434e73.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.ijsolstr.2009.05.007"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> elsevier.com </button> </a>

Reactive transport modelling of hydrothermal dolomitisation using the CSMP++GEM coupled code: Effects of temperature and geological heterogeneity

Alina Yapparova, Tatyana Gabellone, Fiona Whitaker, Dmitrii A. Kulik, Stephan K. Matthäi
<span title="">2017</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/6lp57t7unbfvdlhbmmb53udxzm" style="color: black;">Chemical Geology</a> </i> &nbsp;
Reactive transport modelling of hydrothermal dolomitisation using the CSMP++GEM coupled code: Effects of temperature and geological heterogeneity. Chemical Geology, 466, 562-574. General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: Abstract Reactive transport simulations using our CSMP++GEM coupled code were applied to study the major controls on replacement
more &raquo; ... isation and the development of dolomite geobodies in a hydrothermal setting. A series of 2D simulations show how elevated temperature and reactive surface area increase the rate of dolomitisation, and result in a dolomite replacement front that is both sharper and inclined at a higher angle from vertical. This inclination, an effect of gravity segregation, is apparent in thick homogeneous units, but in layered systems the lithological contrast determines the shape of the dolomite front. The increase in permeability resulting from porosity generation upon replacement of calcite by dolomite has a major effect on accelerating the overall progress of dolomitisation. In contrast, the changes in fluid density due to chemical reactions and the pressure dependence of thermodynamic data have a minor influence under simulated conditions. Primary dolomite forms slowly after complete replacement of host calcite, leading to porosity decrease, and is only locally important around the source of the hydrothermal fluid. For a simple layered system, our model results are in excellent agreement * with those obtained using TOUGHREACT code. They do, however, show the advantage of unstructured triangular over structured rectangular meshes for resolving complex curved/inclined front shapes. Such meshes also offer benefits in simulating fault-controlled hydrothermal dolomitisation. Our simulations predict dolomite geobodies comparable in scale and morphology to natural examples documented at outcrops, and underline the importance of understanding the permeability structure within and around the fault zone.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1016/j.chemgeo.2017.07.005">doi:10.1016/j.chemgeo.2017.07.005</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ivmc7yvy4ba6rbd6vvn2gbly4y">fatcat:ivmc7yvy4ba6rbd6vvn2gbly4y</a> </span>
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Reactive Transport Modelling of Dolomitisation Using the New CSMP++GEM Coupled Code: Governing Equations, Solution Method and Benchmarking Results

Alina Yapparova, Tatyana Gabellone, Fiona Whitaker, Dmitrii A. Kulik, Stephan K. Matthäi
<span title="2017-02-27">2017</span> <i title="Springer Nature"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/xdgsnft55ffrtol2o5ytcjt7qu" style="color: black;">Transport in Porous Media</a> </i> &nbsp;
Complex Systems Modelling Platform (CSMP++) framework (Matthai et al. 2001 ) is an object-oriented software library written in C++ that uses unstructured grids to represent model geometry and finite element  ...  The resulting system of equations (6), (7) and (8) is solved using a hybrid finite element -finite volume method (Geiger et al. 2006) implemented within the CSMP++ framework software library (Matthai  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11242-017-0839-7">doi:10.1007/s11242-017-0839-7</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/geelufgjjrhelpcbmrzwqopgpq">fatcat:geelufgjjrhelpcbmrzwqopgpq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20180723065243/https://research-information.bristol.ac.uk/files/104891265/TIPM_D_16_00316_R2.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/72/7a/727a4bccc47d349ee4f89c01b525f2bce7f643c8.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11242-017-0839-7"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> springer.com </button> </a>

Therapeutic Effects of Human Mesenchymal Stem Cell–derived Microvesicles in Severe Pneumonia in Mice

Antoine Monsel, Ying-gang Zhu, Stephane Gennai, Qi Hao, Shuling Hu, Jean-Jacques Rouby, Michelle Rosenzwajg, Michael A. Matthay, Jae W. Lee
<span title="">2015</span> <i title="American Thoracic Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/k7oewgqstrfjbifylyk4zmr6h4" style="color: black;">American Journal of Respiratory and Critical Care Medicine</a> </i> &nbsp;
Su X, Looney M, Robriquet L, Fang X, Matthay MA.  ...  Monsel A, Zhu Y-G, Hao Q, Liu J, Gennai S, Matthay MA, Lee JW.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1164/rccm.201410-1765oc">doi:10.1164/rccm.201410-1765oc</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/26067592">pmid:26067592</a> <a target="_blank" rel="external noopener" href="https://pubmed.ncbi.nlm.nih.gov/PMC4584251/">pmcid:PMC4584251</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/cquw3u32a5gvrnhhambfr6qvtm">fatcat:cquw3u32a5gvrnhhambfr6qvtm</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190302154713/http://pdfs.semanticscholar.org/a599/484490d3e6e47f4d9a83c00d30c777fd12d7.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/a5/99/a599484490d3e6e47f4d9a83c00d30c777fd12d7.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1164/rccm.201410-1765oc"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4584251" title="pubmed link"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> pubmed.gov </button> </a>

Aerosol lidar intercomparison in the framework of the EARLINET project 1 Instruments

Volker Matthais, Volker Freudenthaler, Aldo Amodeo, Ioan Balin, Dimitris Balis, Jens Bösenberg, Anatoly Chaikovsky, Georgius Chourdakis, Adolfo Comeron, Arnaud Delaval, Ferdinando De Tomasi, Ronald Eixmann (+8 others)
<span title="2004-02-01">2004</span> <i title="The Optical Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/6tkekdr3c5buzcp4zxrwpcfozy" style="color: black;">Applied Optics</a> </i> &nbsp;
In the framework of the European Aerosol Research Lidar Network to Establish an Aerosol Climatology ͑EARLINET͒, 19 aerosol lidar systems from 11 European countries were compared. Aerosol extinction or backscatter coefficient profiles were measured by at least two systems for each comparison. Aerosol extinction coefficients were derived from Raman lidar measurements in the UV ͑351 or 355 nm͒, and aerosol backscatter profiles were calculated from pure elastic backscatter measurements at 351 or
more &raquo; ... , 532, or 1064 nm. The results were compared for height ranges with high and low aerosol content. Some systems were additionally compared with sunphotometers and starphotometers. Predefined maximum deviations were used for quality control of the results. Lidar systems with results outside those limits could not meet the quality assurance criterion. The algorithms for deriving aerosol backscatter profiles from elastic lidar measurements were tested separately, and the results are described in Part 2 of this series of papers ͓Appl. Opt. 43, 977-989 ͑2004͔͒. In the end, all systems were quality assured, although some had to be modified to improve their performance. Typical deviations between aerosol backscatter profiles were 10% in the planetary boundary layer and 0.1 ϫ 10 Ϫ6 m Ϫ1 sr Ϫ1 in the free troposphere.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1364/ao.43.000961">doi:10.1364/ao.43.000961</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/14960093">pmid:14960093</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/zhdg7ws2tjaztbxe6gpntzchpy">fatcat:zhdg7ws2tjaztbxe6gpntzchpy</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170810032325/http://sky.ccny.cuny.edu/wc/Lidar/Refs/earlinet_comp_1.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/ac/77/ac7777431a1d98453d5a22a5881909eccb260d5d.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1364/ao.43.000961"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>
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