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Analysis and reduction of spurious noise generated at grid refinement interfaces with the lattice Boltzmann method
[article]
2020
arXiv
pre-print
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The present study focuses on the unphysical effects induced by the use of non-uniform grids in the lattice Boltzmann method. ...
In particular, the convection of vortical structures across a grid refinement interface is likely to generate spurious noise that may impact the whole computation domain. ...
Acknowledgments The authors would like to gratefully acknowledge Felix Gendre for the fruitful discussions on grid refinement algorithms. ...
arXiv:2004.11863v1
fatcat:mqt3kpp7tnfnrh2owuvos2633u
Hermite regularization of the lattice Boltzmann method for open source computational aeroacoustics
2017
Journal of the Acoustical Society of America
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The lattice Boltzmann method (LBM) is emerging as a powerful engineering tool for aeroacoustic computations. ...
The regularized LBM can be easily coupled with both non-reflective boundary conditions and a multi-level grid strategy, essential ingredients for aeroacoustic simulations. ...
We would like to thank the University of Geneva (Geneva, Switzerland) and the CADMOS project for providing the computational resources. ...
doi:10.1121/1.5006900
pmid:29092578
fatcat:3szjlif2djewbggufcm7vavi5u
Novel methods in the Particle-In-Cell accelerator Code-Framework Warp
2012
Computational Science & Discovery
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tunable numerical dispersion and efficient stride-19 based digital filtering), with great emphasis on the description of the mesh refinement 20 capability. ...
It is also applied in 11 various areas outside the Heavy Ion Fusion program to the study and design of 12 existing and next-generation high-energy accelerators, including the study of electron 13 cloud ...
waves at the mesh refinement interface [43]. ...
doi:10.1088/1749-4699/5/1/014019
fatcat:lahirbjcqbhczdwmfc74jrujdy
A shifting discontinuous-grid-block lattice Boltzmann method for moving boundary simulations
2016
Computers & Fluids
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A translating discontinuous-grid-block model for moving boundaries of finite thickness based on multirelaxation time version of lattice Boltzmann method has been developed. ...
It is shown that the implementation of a body-fitted refined mesh that moves along with the object reduces the spurious oscillations registered in the force and velocity measurements compared to a single ...
Acknowledgment The authors acknowledge the financial support received from the Aeronautics Research and Development Board (ARDB) under SIGMA project No. 1705. ...
doi:10.1016/j.compfluid.2015.11.003
fatcat:etadlab6gjdevi5k2hjdrmhsfu
Multiphase lattice Boltzmann simulations for porous media applications -- a review
[article]
2016
arXiv
pre-print
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In addition to single phase simulations allowing, for example, a precise quantification of the permeability of a porous sample, a number of extensions to the lattice Boltzmann method are available which ...
Over the last two decades, lattice Boltzmann methods have become an increasingly popular tool to compute the flow in complex geometries such as porous media. ...
Acknowledgements We thank Vahid Joekar Niasar and Cor van Kruijsdijk for the organisation of the workshop on "(sub) pore-scale modeling of multiphase flow and transport in porous media" which took place ...
arXiv:1404.7523v2
fatcat:vnmkcogmtzeqdjavoa4j6ulkju
Multiphase lattice Boltzmann simulations for porous media applications
2015
Computational Geosciences
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In addition to single phase simulations allowing, for example, a precise quantification of the permeability of a porous sample, a number of extensions to the lattice Boltzmann method are available which ...
Over the last two decades, lattice Boltzmann methods have become an increasingly popular tool to compute the flow in complex geometries such as porous media. ...
Further refinement of the method has been achieved by identifying general formalisms for deriving higher order expansions of the equilibrium distribution and lattice discretisations allowing to include ...
doi:10.1007/s10596-015-9542-3
fatcat:dgt4n4bwprgi5da3fxntgoipuy
Lattice Boltzmann Method Applied to Nuclear Reactors—A Systematic Literature Review
2020
Sustainability
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The Lattice Boltzmann Method (LBM), a numerical method with a mesoscopic approach to Computational Fluid Dynamic (CFD) derived from the Boltzmann equation and the Maxwell–Boltzmann distribution, can be ...
The purpose of this paper is to present a review of the recent applications of the Lattice Boltzmann Method in nuclear engineering research. ...
Figure 1 . 1 Common grids used in the Lattice Boltzmann Method (LBM) (a) D2Q9; (b) D3Q27. ...
doi:10.3390/su12187835
fatcat:g5gmapffuzd5pig3sgrsazkqiq
Multi-scale initial conditions for cosmological simulations
2011
Monthly notices of the Royal Astronomical Society
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The method uses an adaptive convolution of Gaussian white noise with a real space transfer function kernel together with an adaptive multi-grid Poisson solver to generate displacements and velocities following ...
We discuss a new algorithm to generate multi-scale initial conditions with multiple levels of refinements for cosmological "zoom-in" simulations. ...
Finally, the authors thank the referee, Simon Prunet, for very valuable suggestions to improve the presentation of the paper. All simulations were run on the Orange cluster at KIPAC/SLAC. ...
doi:10.1111/j.1365-2966.2011.18820.x
fatcat:przjbxva6fc53mzzzbt523j7m4
A Review of Multiscale Analysis: Examples from Systems Biology, Materials Engineering, and Other Fluid–Surface Interacting Systems
[chapter]
2005
Advances in Chemical Engineering
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The ideas on spatial coarse graining of the lattice MC method have been developed in collaboration with Prof. Markos A. Katsoulakis. The research of Robert Lam, Dr. Stephanie Raimondeau, Dr. ...
Proofreading by graduate students (Mark Snyder, Jeff Ludwig, Kapil Mayawala, and Dan Zak) of the University of Delaware is also greatly appreciated. ...
The use of a threshold eliminates spurious mesh refinement in ''wrong'' regions. ...
doi:10.1016/s0065-2377(05)30001-9
fatcat:qulpsmltmvdsrk4wpetev4gn3a
Table of contents
2017
2017 IEEE International Symposium on Circuits and Systems (ISCAS)
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R-63 -Phase Noise Analysis of a Homodyne Radar System Driven by a Phase-Locked Loop
R-64 -Multi Component Carrier, Sub-Band DPD and GNURadio Implementation
R-65 -Design Guidelines for the High-Speed ...
MAY 30 TH A Two-Step Radio Receiver Architecture Fully Embedded Into a Charge-Sharing SAR ADC INVITED: Hardware Security at the Heart of IoT Computational Complexity Reduction for Signal Cyclostationarity ...
doi:10.1109/iscas.2017.8049750
fatcat:csazlovzq5g4bmzlf7uss65sy4
A computational study of turbulent flow separation for a circular cylinder using skin friction boundary conditions
[chapter]
2011
ERCOFTAC Series
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From the time discretisation point of view, the Newmark method has a tendency to introduce high frequency noise in the solution field, especially in the vicinity of sharp spatial gradients. ...
as drag and lift of turbulent flow with instead millions of mesh points. ...
of the Extended Abstracts and Full Contributions, and the organization of ADMOS 2013, VI International Conference on Adaptive Modeling and Simulation:
Acknowledgments The authors thank the financial ...
doi:10.1007/978-94-007-0231-8_5
fatcat:f6ll6iawcbeo7pbj4rb7t4o2tq
Modelling of jet noise: a perspective from large-eddy simulations
2019
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
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One contribution of 12 to a theme issue 'Frontiers of aeroacoustics research: theory, computation and experiment' . ...
Subject Areas: fluid mechanics, acoustics, mechanical engineering, power and energy systems, computational physics, computer modelling and simulation ...
method and overset/Chimera method with embedded finer grids. ...
doi:10.1098/rsta.2019.0081
fatcat:iuswyybfs5ffrok3mmnqlrkdu4
Lattice–Boltzmann simulations for complex geometries on high-performance computers
2020
CEAS Aeronautical Journal
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Grid generation for intricate objects is often difficult and requires accurate and scalable geometrical methods to generate meshes for large-scale computations. ...
Simulations on large-scale meshes are performed by a high-scaling lattice-Boltzmann method using the second-order accurate interpolated bounce-back boundary conditions for no-slip walls. ...
A promising numerical method for the efficient simulation of flows are lattice-Boltzmann (LB) methods [3, 27, 31] . ...
doi:10.1007/s13272-020-00450-1
fatcat:tblfyydgyjgbfcztqjs5egp5gq
A new class of high order semi-Lagrangian schemes for rarefied gas dynamics
[article]
2016
arXiv
pre-print
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We propose a proof of concept of this new approach along with numerical tests and comparisons with classical numerical methods. ...
points being located at different positions for any fixed velocity of the lattice. ...
Acknowledgements This work was partly supported by Campus France under the PHC Gallileo 2015-2016 number 32272UL. ...
arXiv:1603.04745v1
fatcat:adxy7jytrbgnfgt2yfo6astpuq
Progress in particle-based multiscale and hybrid methods for flow applications
2016
Microfluidics and Nanofluidics
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Acknowledgments This work has been supported by the Centre of Fluid Mechanics and Computational Science, EEB6001R. ...
, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. ...
Lattice Boltzmann method The lattice Boltzmann method (LBM) is strictly speaking not a direct particle method. ...
doi:10.1007/s10404-016-1729-y
fatcat:z7l5bu4o3fea3mcg5cznlodppu
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