Title

Study Of Transitional Regime Gas Flows Over A Backward-Facing Step

Abstract

As in the macro-scale conventional counterparts, microscale flow systems require robust simulation tools for early-stage design iterations. This paper concentrates on a typical such flow process, namely flow over a backward facing step. Direct simulation Monte Carlo (DSMC) is used as the simulation tool. Separating the macroscopic velocity from the molecular velocity through the use of the IP method eliminates the high-level of statistical noise as typical in DSMC calculation of low-speed flows. The non-isothermal IP method is modified to incorporate the pressure boundary conditions, which are expected to be more prevalent in design of thermal management systems. The flow mechanisms over a backward-facing step in a microchanael at different pressures are investigated. The range of parameter values for this investigation are: Re from 0.03 to 0.64, Ma from 0.013 to 0.083, and Kn from 0.24 to 4.81, all based on maximum values.

Publication Date

12-21-2006

Publication Title

Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

Volume

3

Number of Pages

1973-1987

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

33845531492 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33845531492

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