Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session V22: Computational Methods for Statistical Mechanics: Advances and Applications - II
3:00 PM–6:00 PM,
Thursday, March 18, 2021
Sponsoring Units: DCOMP GSNP
Chair: Alfred Farris, Emory University
Abstract: V22.00002 : Deriving LBM Collision Operator using the Coarse-Graining MDLG Approach*
3:36 PM–3:48 PM
(Physics, North Dakota State University)
In this talk, we present the MDLG analysis to derive the LBM collision operator from an underlying MD simulation of a system undergoing a simple shear flow. This gives us insights into the physical underpinnings of the LBM collision operator. In particular, over-relaxation has been seen as a useful numerical trick without a fundamental physics basis. However, we obtain over-relaxation directly from the MDLG approach which shows that over-relaxation is indeed a physical effect.
 Parsa, M. Reza and Wagner, Alexander J., Phys. Rev. E96, 013314 (2017).
*AP acknowledges the support of the CNLS and the LDRD program at LANL.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
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