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

    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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