Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/73632
Title: Modeling of flow characteristic and heat transfer for micro couette flow
Authors: Xue, H.
Xie, L.
Chou, S.K. 
Issue Date: 2001
Source: Xue, H.,Xie, L.,Chou, S.K. (2001). Modeling of flow characteristic and heat transfer for micro couette flow. American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD 369 (1) : 385-388. ScholarBank@NUS Repository.
Abstract: Gaseous flow encountered in micro/nano electromechanical systems experiences change in Kn number across a wide range of flow regime due to variation in characteristic length in the system and significant compressibility of the rarefied gas. In this study, we attempt to develop a general, physics-based model to predict the flow and heat transfer in the slip and transition regimes. Such an extension is constructed on the fact that Chapman-Enskog's approximation of the Boltzmann equation can be revised using a function of Kn number as a perturbation. Velocity slip and temperature jump at the solid boundaries are modified accordingly. Rarefaction effects on dynamic viscosity and thermal conductivity are considered. As a first step to evaluate the model, it is applied to the simplest shear-driven flow, micro Couette flow. Compared with the results of DSMC, satisfactory agreement has been achieved in a wide range of Kn and Ma numbers.
Source Title: American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
URI: http://scholarbank.nus.edu.sg/handle/10635/73632
ISSN: 02725673
Appears in Collections:Staff Publications

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