A three-dimensional modal discontinuous Galerkin method for the second-order Boltzmann-Curtiss-based constitutive model of rarefied and microscale gas flows

S Singh, A Karchani, T Chourushi, RS Myong - Journal of Computational …, 2022 - Elsevier
A three-dimensional mixed modal discontinuous Galerkin (DG) method based on tetrahedral
meshes was developed for simulating all flow regimes from subsonic to hypersonic rarefied …

Impact of bulk viscosity on flow morphology of shock-accelerated cylindrical light bubble in diatomic and polyatomic gases

S Singh, M Battiato, RS Myong - Physics of Fluids, 2021 - pubs.aip.org
Shock-accelerated bubbles have long been an intriguing topic for understanding the
fundamental physics of turbulence generation and mixing caused by the Richtmyer …

Numerical investigation of thermal non-equilibrium effects of diatomic and polyatomic gases on the shock-accelerated square light bubble using a mixed-type modal …

S Singh - International Journal of Heat and Mass Transfer, 2021 - Elsevier
In this article, a numerical investigation is carried out for analyzing the thermal non-
equilibrium effects of diatomic and polyatomic gases on the flow dynamics of a shock …

An explicit modal discontinuous Galerkin method for Boltzmann transport equation under electronic nonequilibrium conditions

S Singh, M Battiato - Computers & Fluids, 2021 - Elsevier
The present paper deals with the development of a numerical scheme for the solution of two-
dimensional Boltzmann transport equation (BTE) under electronic nonequilibrium …

Numerical simulations of Richtmyer–Meshkov instability of SF6 square bubble in diatomic and polyatomic gases

S Singh, M Battiato - Computers & Fluids, 2022 - Elsevier
Abstract The Richtmyer–Meshkov instability of a shock-driven SF 6 square bubble in
monatomic, diatomic, and polyatomic gases is investigated numerically. The focus was …

Contribution of Mach number to the evolution of the Richtmyer-Meshkov instability induced by a shock-accelerated square light bubble

S Singh - Physical Review Fluids, 2021 - APS
The Richtmyer-Meshkov (RM) instability has long been an interesting subject due to its
fundamental significance in scientific research, as well as its crucial role in engineering …

Thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic gases in cylindrical Couette flow based on second-order non-Navier–Fourier …

T Chourushi, A Rahimi, S Singh, O Ejtehadi… - International Journal of …, 2022 - Elsevier
The thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic
gases in cylindrical Couette flow are investigated using first-and second-order Boltzmann …

Strongly out-of-equilibrium simulations for electron Boltzmann transport equation using modal discontinuous Galerkin approach

S Singh, M Battiato - International Journal of Applied and Computational …, 2020 - Springer
In this study, we present simulations of strongly out-of-equilibrium conditions for the one-
dimensional electron Boltzmann transport equation (BTE) in semiconductor devices. An …

Behavior of a shock-accelerated heavy cylindrical bubble under nonequilibrium conditions of diatomic and polyatomic gases

S Singh, M Battiato - Physical Review Fluids, 2021 - APS
The physical problem based on a shock-accelerated bubble has long been a fascinating
subject in the study of the Richtmyer-Meshkov (RM) instability. In this study the behavior of a …

High-order compact gas-kinetic schemes for three-dimensional flow simulations on tetrahedral mesh

F Zhao, X Ji, W Shyy, K Xu - Advances in Aerodynamics, 2023 - Springer
A general framework for the development of high-order compact schemes has been
proposed recently. The core steps of the schemes are composed of the following. 1). Based …