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Grid-independent Eulerian-Lagrangian approaches for simulations of solid fuel particle combustion

Jingyuan Zhang, Tian Li, Henrik Ström, Terese Løvås
2020 Chemical Engineering Journal  
This parameter affects the sampling of the gas phase properties required for the particle model and the distribution of the solid phase properties.  ...  These coupling methods are validated and compared with the widely used particle centroid method (PCM) for combustion of a biomass particle in a single particle combustor.  ...  UNINET Sigma2 and NTNU HPC Group provided high-performance computational resources for CFD simulations.  ... 
doi:10.1016/j.cej.2019.123964 fatcat:wdf5bmy2y5gk3dx67n7xlhzyc4

PPM – A highly efficient parallel particle–mesh library for the simulation of continuum systems

I.F. Sbalzarini, J.H. Walther, M. Bergdorf, S.E. Hieber, E.M. Kotsalis, P. Koumoutsakos
2006 Journal of Computational Physics  
The present library solves the key parallelization issues involving particle-mesh interpolations and the balancing of processor particle loading, using a novel adaptive tree for mixed domain decompositions  ...  In this formulation, the grid-free character of particle methods is relaxed by the introduction of a mesh for the reinitialization of the particles, the computation of the field equations, and the discretization  ...  Charypar and P. Gonnet (CSE Lab, ETHZ) as well as implementation support by I. Oppermann and B. Polasek (ETHZ). Computer resources were provided by the Swiss National Supercomputing Centre (CSCS).  ... 
doi:10.1016/ fatcat:jkvh4xqjpbgvlike56zcvsp4sq

Enabling particle applications for exascale computing platforms

Susan M Mniszewski, James Belak, Jean-Luc Fattebert, Christian FA Negre, Stuart R Slattery, Adetokunbo A Adedoyin, Robert F Bird, Choongseok Chang, Guangye Chen, Stéphane Ethier, Shane Fogerty, Salman Habib (+12 others)
2021 The international journal of high performance computing applications  
., those which often dominate molecular dynamics (MD) and smoothed particle hydrodynamics (SPH) methods), long-range particleparticle interactions (e.g., electrostatic MD and gravitational N-body), particle-in-cell  ...  The Exascale Computing Project (ECP) is invested in co-design to assure that key applications are ready for exascale computing.  ...  Acknowledgements This work was performed as part of the Co-design Center for Particle Applications, supported by the Exascale Computing Project This paper describes objective technical results and analysis  ... 
doi:10.1177/10943420211022829 fatcat:7goiighkmjgjnosvzjubskjplq

A Review of Vortex Methods and Their Applications: From Creation to Recent Advances

Chloé Mimeau, Iraj Mortazavi
2021 Fluids  
Vortex methods belong to Lagrangian approaches and allow us to solve the incompressible Navier-Stokes equations in their velocity-vorticity formulation.  ...  Particle methods distinguish themselves by their intuitive and natural description of the fluid flow as well as their low numerical dissipation and their stability.  ...  The introduction of grid and remeshing process in vortex methods marks the birth of hybrid methods, with among them the Eulerian-Lagrangian decomposition domain methods and the Vortex-Particle-Mesh methods  ... 
doi:10.3390/fluids6020068 fatcat:unqqtr7vcjea3nz7hjkxzv2gxm

Numerical study of cuttings transport of nanoparticle‐based drilling fluid

Mortatha Al‐Yasiri, Amthal Al‐Gailani, Dongsheng Wen
2020 Engineering Reports  
density, shape, concentration, and drilling fluids-cuttings particle coupling regimes on the cuttings transport in a vertical wellbore.  ...  The understanding of the influence and the mechanisms responsible for the improvement in cuttings transport process can further advance the application of NPs for drilling fluids.  ...  The time step size for a transient solver for satisfactory convergence for fluid and particle phases is chosen as 0.001 second.  ... 
doi:10.1002/eng2.12154 fatcat:wpvguw44mzfh5l2meiqppt7zpe

SPH Modeling of Water-Related Natural Hazards

Manenti, Wang, Domínguez, Li, Amicarelli, Albano
2019 Water  
This paper collects some recent smoothed particle hydrodynamic (SPH) applications in the field of natural hazards connected to rapidly varied flows of both water and dense granular mixtures including sediment  ...  This aspect is extremely important when simulating complex three-dimensional problems that require a high computational cost and are generally involved in the modeling of water-related natural hazards  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/w11091875 fatcat:bdvmbpx5mrgvddyszu37gtpgwq

Tinker-HP: a massively parallel molecular dynamics package for multiscale simulations of large complex systems with advanced point dipole polarizable force fields

Louis Lagardère, Luc-Henri Jolly, Filippo Lipparini, Félix Aviat, Benjamin Stamm, Zhifeng F. Jing, Matthew Harger, Hedieh Torabifard, G. Andrés Cisneros, Michael J. Schnieders, Nohad Gresh, Yvon Maday (+3 others)
2018 Chemical Science  
Acknowledgements This work was made possible thanks to the French state funds managed by the CalSimLab LABEX and the ANR within the Investissements d'Avenir program (reference ANR-11-IDEX-0004-02) and  ...  The most standard one uses a 1D or 2D decomposition of the 3D grid and has been described elsewhere 12, 40 in detail.  ...  Naturally, because the Fourier space decomposition of the grid may not t exactly the 3D spatial decomposition, additional communications of positions are required before starting the reciprocal part of  ... 
doi:10.1039/c7sc04531j pmid:29732110 pmcid:PMC5909332 fatcat:7gur7v4oyvhg3ok77car6sr3hq

Wind Reversal in Bubbly Natural Convection

Paolo Oresta, Laura Fabbiano, Gaetano Vacca
2020 Applied Sciences  
The continuous phase has been solved numerically using the direct numerical simulation (DNS) technique and each bubble has been tracked by means of a particle Lagrangian model.  ...  For this reason, the fundamental research proposed in this paper aimed to identify a space of control parameters and the physical mechanisms responsible for the wind reversal induced by dispersed bubbles  ...  The solver handles the multi-dispersed particle distribution and it is parallelized by OpenMp for both the Eulerian continuum phase and the Lagrangian particle tracking.  ... 
doi:10.3390/app10228242 fatcat:dcrxlsx2encnvbuh22zrsf7ml4

Computational Microfluidics for Geosciences

Cyprien Soulaine, Julien Maes, Sophie Roman
2021 Frontiers in Water  
Computational microfluidics for geosciences is the third leg of the scientific strategy that includes microfluidic experiments and high-resolution imaging for deciphering coupled processes in geological  ...  In this paper, we review the state-of-the-art computational microfluidics for geosciences, the open challenges, and the future trends.  ...  Moreover, for the same accuracy, SPH is more computationally intensive than FVM or FEM because it requires much more neighboring particles than the tensile of grid-based methods.  ... 
doi:10.3389/frwa.2021.643714 doaj:df90b8b68161415491091a402821a959 fatcat:d6gpzaekefckjepz2xtsfnoxti

Multiscale Eulerian CFD of Chemical Processes: A Review

Son Ich Ngo, Young-Il Lim
2020 ChemEngineering  
The molecular, coarse-grained particle, and meso-scale dynamics at the individual scale are excluded in this review.  ...  as continuum fluids.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/chemengineering4020023 fatcat:hz7ivudczjbenfmb3byt6uqlni

Lethe-DEM : An open-source parallel discrete element solver with load balancing [article]

Shahab Golshan, Peter Munch, Rene Gassmoller, Martin Kronbichler, Bruno Blais
2021 arXiv   pre-print
Lethe-DEM, a module of Lethe, consists of solvers for two-dimensional and three-dimensional DEM simulations.  ...  The Discrete Element Method (DEM) provides detailed insights of phenomena at particle scale and it is therefore often used for modeling granular materials.  ...  There are two common approaches in the numerical modelling of granular flows, continuum models (Eulerian) and discrete models (Lagrangian).  ... 
arXiv:2106.09576v1 fatcat:eww56r4bqbabpnllpwyrpoyvoe

Parallel computing works!

Marcin Paprzycki
1996 IEEE Parallel & Distributed Technology Systems & Applications  
grid), and the coarsest-grid solver.  ...  Soil mechanics is a macroscopic continuum model requiring an explicit constitutive law relating, for example; stress and strain.  ...  Initially, a small popula- An 11 x 9 array with block-linear rows (B = 2) and scattered columns on a 4 x 4 logical process grid.  ... 
doi:10.1109/mpdt.1996.7102339 fatcat:r6x46zu2pfd4rin4qpzt7ftqqq

Meshless techniques for anisotropic diffusion

Annamaria Mazzia, Giorgio Pini, Flavio Sartoretto
2014 Applied Mathematics and Computation  
A good numerical method would be locally mass conservative, produce no or minimal over/under-shoots, produce minimal numerical diffusion, and require no CFL time-step limit for stability.  ...  Transport processes are common in geoscience applications, and find their way into models of, e.g., the atmosphere, oceans, shallow water, subsurface, seismic inversion, and deep earth.  ...  We present complex scenarios of multicomponent reactive transport in 2-D and in 3-D. These scenarios are further developments of the setting given by the MoMaS benchmark.  ... 
doi:10.1016/j.amc.2014.03.032 fatcat:c527226gyfgbffnq4p67qxd7wi

Simulating Hydrodynamics in Cosmology with CRK-HACC [article]

Nicholas Frontiere, J.D. Emberson, Michael Buehlmann, Joseph Adamo, Salman Habib, Katrin Heitmann, Claude-André Faucher-Giguère
2022 arXiv   pre-print
In this work, we summarize the primary solver components and present a number of standard validation tests to demonstrate efficacy, including idealized hydrodynamic and cosmological setups, as well as  ...  The new framework couples the HACC gravitational N-body solver with a modern smoothed particle hydrodynamics (SPH) approach called CRKSPH.  ...  ACKNOWLEDGMENTS We thank Mike Owen and Cody Raskin for their continued collaboration and guidance, as well as their contributions in both the origination and extensions of Lastly, NF would like to thank  ... 
arXiv:2202.02840v1 fatcat:obn6y22w6ndzrjbbuphvaalu2y

Numerical simulations of quasar absorbers

Tom Theuns
2005 Proceedings of the International Astronomical Union  
This paper is meant as an introduction to this subject, and reviews techniques and methods for simulating the intergalactic medium.  ...  The spectra also contain metal lines, which can be used to constrain the star formation history and the feedback processes acting in large and small galaxies.  ...  Acknowledgements I thank the organisers for a very stimulating meeting, the IAU for travel support, PPARC for the award of an Advanced Fellowship, and my collaborators for allowing me to show our results  ... 
doi:10.1017/s1743921305002590 fatcat:gywad4ifp5ecdijlpc5vgurwai
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