Open AccessInvestigation of Subsonic and Hypersonic Rarefied Gas Flow over a Backward Facing Step
Author(s) -
Deepak Nabapure,
Jayesh Sanwal,
Sreeram Rajesh,
K. Ram Chandra Murthy
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1276/1/012007
Subject(s) - mach number , hypersonic speed , rarefaction (ecology) , mechanics , direct simulation monte carlo , flow (mathematics) , work (physics) , physics , aerospace engineering , monte carlo method , thermodynamics , mathematics , geology , engineering , paleontology , statistics , dynamic monte carlo method , species richness
In the present study the Direct Simulation Monte Carlo (DSMC) method, which is one of the widely used numerical method to study the rarefied gas flows, is applied to investigate the flow characteristics of a hypersonic and subsonic flow over a backward-facing step. The work is driven by the interest in exploring the effects of the Mach number on the rarefied flow behaviour. The primary objective of this paper is to study the variation of velocity, pressure and temperature with Mach number. The numerical tool is validated with well established results from the literature and a good agreement is found among them. The computational results indicate that the flow downstream of the step is effected by the strong expansion near the step. The compressiblity and rarefaction effects also influence the velocity and temperature distributions in the hydrodynamic and thermal boundary layers.