Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session F48: Fluid Mechanics -- General
11:15 AM–1:27 PM,
Tuesday, March 5, 2019
BCEC
Room: 251
Sponsoring
Units:
DFD GSNP
Chair: Michael Allshouse, Northeastern University
Abstract: F48.00008 : A Random Choice SPH Scheme with Adaptive Viscosity*
12:39 PM–12:51 PM
Presenter:
Zhixuan Cao
(FBU (Fluids Business Unit), ANSYS Inc.)
Authors:
Zhixuan Cao
(FBU (Fluids Business Unit), ANSYS Inc.)
Abani K Patra
(Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo)
E. Bruce Pitman
(Department of Materials Design and Innovation, The State University of New York at Buffalo)
We propose a new SPH scheme that combines an approximate version of Glimm\rq{}s Random Choice method (RCM) with SPH. Our version approximately resolves hydrodynamic waves, and samples the approximate solution without explicit artificial viscosity. Several attractive features of this method is demonstrated by 1D shock tube tests. First, this method introduces adaptive artificial viscosity, assigning larger dissipation near discontinuities and smaller elsewhere. Secondly, it is less dissipative than classical SPH and GSPH resulting in less smearing of shock. Thirdly, this method also ameliorates pressure ``wiggle" around contact discontinuity.
*The wrok is supported by Grants No. NSF ACI/1131074.
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