A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Filters
Development of a coupling between a system thermal-hydraulic code and a reduced order CFD model
[article]
2020
arXiv
pre-print
Preserved Fulltext
Other Versions
The velocity transported over a coupling boundary interface is imposed in the ROM using a penalty method. The coupled models are evaluated on open and closed pipe flow configurations. ...
Also for new parameter sets, the coupled RELAP5/ROM models are capable of predicting the coupled RELAP5/CFD results with good accuracy. ...
Acknowledgment The authors would like to thank the ITHACA-FV developers and contributors for their input and insightful discussions on the development of reduced order models. ...
arXiv:2009.10817v2
fatcat:fgriuq2klfbtzh66js5prvsd6q
An efficient method for simulation of the dynamics of a large number of deformable droplets in the stokes regime
2014
Doklady physics (Print)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
ACKNOWLEDGMENTS The study is supported by Grant of Ministry of Education and Science of the Russian Federation (11.G34.31.0040), Grant RFFI no. 12 01 31173, and Fantalgo, LLC (Maryland, USA). ...
The Krylov subspace projection methods are among the most efficient methods for solution of SLAE. Particularly, in the present paper the general minimal residual method (GMRES) [9] is used. ...
The developed method can
be used for solution of a wide range of problems related to the emulsion flow in micro and nanoscales. ...
doi:10.1134/s102833581405005x
fatcat:utydh2wykfgude2rhpghohgjau
On adaptive BDDC for the flow in heterogeneous porous media
[article]
2019
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
We study a method based on Balancing Domain Decomposition by Constraints (BDDC) for a numerical solution of a single-phase flow in heterogenous porous media. ...
Performance of the method is illustrated on the benchmark problem from the 10th SPE Comparative Solution Project (SPE 10). ...
These trends are in agreement with the qualitative observations made from Figure 6 .5.
Conclusion. We studied a method for solution of single-phase flow in heterogeneous porous media. ...
arXiv:1901.02090v1
fatcat:6xn5pudhqvcgdnllahd52jg2d4
A bidirectional coupling procedure applied to multiscale respiratory modeling
2013
Journal of Computational Physics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
In addition we have developed a "pressure-drop" residual which allows for stable coupling of flows between a 3D incompressible CFD application and another (lowerdimensional) fluid system. ...
In the case of a single residual evaluation per timestep, the method has zero additional computational cost compared to uncoupled or unidirectionally coupled simulations. ...
Keith Miller for the idea of applying a partial NACCEL correction at the end of a timestep. We also gratefully acknowledge Drs. Robb Glenny and Sudhaker Pipavath, UW for the human CT images. ...
doi:10.1016/j.jcp.2012.10.021
pmid:24347680
pmcid:PMC3856712
fatcat:j77ijbn5andirdegsztb6rops4
Lighthouse: A User-Centered Web Service for Linear Algebra Software
[article]
2014
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
In the Lighthouse project, we enable developers with varied backgrounds to readily discover and effectively apply the best available numerical software for their problems. ...
Meanwhile, experts in these domains typically lack the training or time required to develop efficient, high-performance implementations of linear algebra algorithms. ...
The Janus supercomputer is a joint effort of the University of Colorado Boulder, the University of Colorado Denver, and the National Center for Atmospheric Research. ...
arXiv:1408.1363v1
fatcat:wvaptefynbhkjhelihzzxo7f2u
CTLSS-an advanced electromagnetic simulation tool for designing high-power microwave sources
2000
IEEE Transactions on Plasma Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2006; you can also visit the original URL.
The file type is application/pdf.
The electromagnetic simulation engine in CTLSS has been designed and implemented as a volumetric frequency-domain model that can handle both resonant eigenvalue problems, using the Jacobi-Davidson algorithm ...
Currently, this link has been implemented for helix traveling-wave tubes (TWT's) only, using the CHRISTINE code as the large-signal model, but a new, general, large-signal model is under development and ...
Subspace projection methods represent a general class of methods for the solution of large eigensystems. ...
doi:10.1109/27.887737
fatcat:cv7fzpad4rhjxhndsx35aup3za
Application of the parallel BDDC preconditioner to the Stokes flow
2011
Computers & Fluids
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2011; you can also visit the original URL.
The file type is application/pdf.
Other Versions
It is successfully applied to several problems of Stokes flow discretized by Taylor-Hood finite elements and BDDC is shown to be a promising method also for this class of problems. ...
A parallel implementation of the Balancing Domain Decomposition by Constraints (BDDC) method is described. It is based on formulation of BDDC with global matrices without explicit coarse problem. ...
JakubŠístek also thanks to the European Science Foundation OPTPDE (Optimization with PDE Constraints) Network for the financial support of attending the 10th ICFD Conference on Numerical Methods for Fluid ...
doi:10.1016/j.compfluid.2011.01.002
fatcat:drspb7dodzbxha2vxczt7fsteq
Perspective on Eulerian Finite Volume Methods for Incompressible Interfacial Flows
[chapter]
1998
Free Surface Flows
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2011; you can also visit the original URL.
The file type is application/pdf.
In the following, many algorithms are reviewed brie y and commented on, but special attention is paid to projection methods for the incompressible NS equations, volume tracking methods for interface kinematics ...
Interfaces present in these ows possess topologies that are not only irregular but also dynamic, undergoing gross changes such as merging, tearing, and lamenting as a result of the ow and interface physics ...
In approximate projection methods, the discrete projection operator does not necessarily algebraically match the conditions for being a projection. ...
doi:10.1007/978-3-7091-2598-4_6
fatcat:cpbtn56zbvcglbpklk6tadokd4
A finite element based level set method for two-phase incompressible flows
2006
Computing and Visualization in Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2007; you can also visit the original URL.
The file type is application/pdf.
We present a method that has been developed for the efficient numerical simulation of two-phase incompressible flows. For capturing the interface between the flows the level set technique is applied. ...
For reparametrization of the level set function a new variant of the Fast Marching method is introduced. ...
routines that are implemented for a one-phase flow problem can be reused both for the Navier-Stokes part and for the advection equation. ...
doi:10.1007/s00791-006-0024-y
fatcat:sgnphnwsz5f3fida3n6sybxuwa
Validated simulation of droplet sedimentation with finite-element and level-set methods
2010
Chemical Engineering Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2009; you can also visit the original URL.
The file type is application/pdf.
The finite-element and the extended finite-element methods were implemented and compared. The level-set function is used for capturing the interface movement. ...
The three-dimensional instationary simulations included the stages of drop acceleration, deformation, and stability in terms of shape and velocity. ...
Acknowledgement This project was funded by the German Research Foundation (DFG) in the framework of the collaborative research centre CRC 540 "Model-based Experimental Analysis of Kinetic Phenomena in ...
doi:10.1016/j.ces.2009.11.043
fatcat:jcqfu2dl7rap5fnyhtl7g26gkm
A consistent rescaled momentum transport method for simulating large density ratio incompressible multiphase flows using level set methods
2013
Physica Scripta
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
damped surface wave, and the collapse of a water column in air under ambient conditions. ...
We present results obtained with the new method for a number of high-density ratio test cases, including the advection of a 1,000,000:1 density ratio impulsively accelerated drop, a 1000:1 density ratio ...
The authors would also like to thank M. Raessi, O. Desjardins, and F. Ham for many helpful discussions. ...
doi:10.1088/0031-8949/2013/t155/014050
fatcat:rfeg2h4jovbk7mixdrc4iamwwq
The Immersed Boundary Method: Application to Two-Phase Immiscible Flows
2019
Communications in Computational Physics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Further, we present a grid independence study and extensive verification of the developed method for representative 2D two-phase flows dominated by buoyancy, shear stress, and surface tension forces. ...
In this paper we present an extended formulation of the immersed boundary (IB) method that facilitates simulation of incompressible immiscible two-phase flows. ...
An additional contribution to the development of the fully coupled DLM approach was due to the work of Taira and Colonius [32] , who implemented it within the framework of a projection method. ...
doi:10.4208/cicp.oa-2018-0018
fatcat:4y26ey7yljdqxjynsdzlbdfmbm
Petascale algorithms for reactor hydrodynamics
2008
Journal of Physics, Conference Series
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2008; you can also visit the original URL.
The file type is application/pdf.
We describe recent algorithmic developments that have enabled large eddy simulations of reactor flows on up to P = 65, 000 processors on the IBM BG/P at the Argonne Leadership Computing Facility. ...
Computer time on the Argonne Leadership Computing Facility was provided through a 2008 DOE Office of Science INCITE Award. ...
We thank Hank Childs and David Bremer from the LLNL VisIt group for assistance with graphics and data analysis Scott Parker at the ALCF for assistance with BG/P, and Stefan Kerkemeier of ETH, Zurich, for ...
doi:10.1088/1742-6596/125/1/012076
fatcat:gfxgpvidjvcw5ncg5viuchd4me
Partitioned semi-implicit methods for simulation of biomechanical fluid-structure interaction problems
2016
Journal of Physics, Conference Series
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
Numerical tests are conducted in the context of a biomechanical problem. ...
Fixed-point solver with Aitken's relaxation method also proved to be a simple, yet efficient method for FSI simulations. ...
This idea was first proposed in [10] and later used in [11, 12] . The pressure stress term is split off by using a fractional step projection method for fluid flow equations. ...
doi:10.1088/1742-6596/745/3/032020
fatcat:lcbmybe4pfh7hketys34bw5pqe
Sharp Interface Algorithm for Large Density Ratio Incompressible Multiphase Magnetohydrodynamic Flows
2013
Procedia Computer Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
The algorithm employs the method of front tracking for the propagation of material interfaces and the embedded interface method for solving elliptic-parabolic problems associated with approximations of ...
A numerical algorithm and the corresponding paralleled implementation for the study of magnetohydrodynamics (MHD) of large density ratio, three-dimensional multiphase flows at low magnetic Reynolds numbers ...
Acknowledgments: This work was supported in part by the Muon Accelerator Program of the US Department of Energy. ...
doi:10.1016/j.procs.2013.05.215
fatcat:6avl7cx6yvcy3bjkhucjpgzs6i
« Previous
Showing results 1 — 15 out of 4,178 results