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Analysis and reduction of spurious noise generated at grid refinement interfaces with the lattice Boltzmann method [article]

Thomas Astoul, Gauhier Wissocq, Jean-François Boussuge, Alois Sengissen, Pierre Sagaut
2020 arXiv   pre-print
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

F. Brogi, O. Malaspinas, B. Chopard, C. Bonadonna
2017 Journal of the Acoustical Society of America  
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

J-L Vay, D P Grote, R H Cohen, A Friedman
2012 Computational Science & Discovery  
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

Nipun Arora, Amit Gupta, Wei Shyy
2016 Computers & Fluids  
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]

Haihu Liu, Qinjun Kang, Christopher R. Leonardi, Sebastian Schmieschek, Ariel Narváez, Bruce D. Jones, John R. Williams, Albert J. Valocchi, Jens Harting
2016 arXiv   pre-print
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

Haihu Liu, Qinjun Kang, Christopher R. Leonardi, Sebastian Schmieschek, Ariel Narváez, Bruce D. Jones, John R. Williams, Albert J. Valocchi, Jens Harting
2015 Computational Geosciences  
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

Johan Augusto Bocanegra Cifuentes, Davide Borelli, Antonio Cammi, Guglielmo Lomonaco, Mario Misale
2020 Sustainability  
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

Oliver Hahn, Tom Abel
2011 Monthly notices of the Royal Astronomical Society  
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]

Dionisios G. Vlachos
2005 Advances in Chemical Engineering  
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)  
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]

Johan Hoffman, Niclas Jansson
2011 ERCOFTAC Series  
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

Guillaume A. Brès, Sanjiva K. Lele
2019 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
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

Andreas Lintermann, Wolfgang Schröder
2020 CEAS Aeronautical Journal  
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]

Giacomo Dimarco, Cory Hauck, Raphaël Loubère
2016 arXiv   pre-print
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

Tom-Robin Teschner, László Könözsy, Karl W. Jenkins
2016 Microfluidics and Nanofluidics  
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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