Title

Modeling of microscale gas flows in transition regime Part I: Flow over backward facing steps

Authors

Authors

U. Kursun;J. S. Kapat

Comments

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Abbreviated Journal Title

Nanoscale Microscale Thermophys. Eng.

Keywords

DSMC; IP Method; microscale; low speed gas flow heat transfer; SIMULATION MONTE-CARLO; MICRODEVICES; Thermodynamics; Engineering, Mechanical; Nanoscience & Nanotechnology; Materials Science, Characterization & Testing; Physics, Applied

Abstract

Design of thermal management solutions for future nanoscale electronics or photonics devices will require knowledge of flow and transport through micron-scale ducts. This article concentrates on a typical flow process, namely flow over a backward-facing step with pressure boundary conditions at inlet and exit. Discrete simulation Monte Carlo (DSMC) is used as the simulation tool. An IP method is used to separate the macroscopic velocity from the molecular velocity, thus reducing statistical noise as typical in DSMC calculation of lowspeed flows. Simulation is conducted for Re of 0.03 to 0.64, Ma of 0.013 to 0.083, and Kn of 0.24 to 4.81. For these parameter values no recirculating region is observed, and the high heat flux associated with reattachment is also absent.

Journal Title

Nanoscale and Microscale Thermophysical Engineering

Volume

11

Issue/Number

1-2

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

15

Last Page

30

WOS Identifier

WOS:000247374100002

ISSN

1556-7265

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