Hostname: page-component-74656f9884-2dmjx Total loading time: 0 Render date: 2026-11-09T21:28:39.550Z Has data issue: false hasContentIssue false

A Direct Solver for Initial Value Problems of Rarefied Gas Flows of Arbitrary Statistics

Published online by Cambridge University Press:  03 June 2015

Jaw-Yen Yang*
Affiliation:
Institute of Applied Mechanics, National Taiwan University, Taipei 10764, Taiwan
Bagus Putra Muljadi*
Affiliation:
Institute of Applied Mechanics, National Taiwan University, Taipei 10764, Taiwan FCS STAE, Université Paul Sabatier, Institut de mathématiques de Toulouse, Toulouse 31400, France
Zhi-Hui Li*
Affiliation:
National Laboratory for Computational Fluid Dynamics, Beijing 100191, China China Aerodynamics Research and Development Center, Mianyang, 621000, China
Han-Xin Zhang*
Affiliation:
National Laboratory for Computational Fluid Dynamics, Beijing 100191, China China Aerodynamics Research and Development Center, Mianyang, 621000, China
Get access

Abstract

An accurate and direct algorithm for solving the semiclassical Boltzmann equation with relaxation time approximation in phase space is presented for parallel treatment of rarefied gas flows of particles of three statistics. The discrete ordinate method is first applied to discretize the velocity space of the distribution function to render a set of scalar conservation laws with source term. The high order weighted essentially non-oscillatory scheme is then implemented to capture the time evolution of the discretized velocity distribution function in physical space and time. The method is developed for two space dimensions and implemented on gas particles that obey the Maxwell-Boltzmann, Bose-Einstein and Fermi-Dirac statistics. Computational examples in one- and two-dimensional initial value problems of rarefied gas flows are presented and the results indicating good resolution of the main flow features can be achieved. Flows of wide range of relaxation times and Knudsen numbers covering different flow regimes are computed to validate the robustness of the method. The recovery of quantum statistics to the classical limit is also tested for small fugacity values.

Information

Type
Research Article
Copyright
Copyright © Global Science Press Limited 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable