Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2447
Title: Diffused bounce-back condition and refill algorithm for the lattice Boltzmann method
Authors: Krithivasan, Siddharth
Wahal, Siddhant
Ansumali, Santosh
Keywords: Fluids & Plasmas Physics
Mathematical Physics
Particulate Suspensions
Boundary-Condition
Simulations
Equation
Flow
Models
Issue Date: 2014
Publisher: American Physical Society
Citation: Krithivasan, S; Wahal, S; Ansumali, S, Diffused bounce-back condition and refill algorithm for the lattice Boltzmann method. Physical Review E 2014, 89 (3), 33313 http://dx.doi.org/10.1103/PhysRevE.89.033313
Physical Review E
89
3
Abstract: A solid-fluid boundary condition for the lattice Boltzmann (LB) method, which retains the simplicity of the bounce-back method and leads to positive definite populations similar to the diffusive boundary condition, is presented. As a refill algorithm, it is proposed that quasi-equilibrium distributions be used to model distributions at fluid nodes uncovered due to solid movement. The method is tested for flow past an impulsively started cylinder and demonstrates considerable enhancement in the accuracy of the unsteady force calculation at moderate and high Reynolds numbers. Furthermore, via simulations, we show that momentum exchange procedure used in LB to compute forces is not Galilean invariant. A modified momentum exchange procedure is proposed to reduce the errors due to violation of Galilean invariance.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2447
ISSN: 1539-3755
Appears in Collections:Research Articles (Santosh Ansumali)

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