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JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 14, NO. 4, AUGUST 2005 847 Reconsideration of Low Reynolds Number
 

Summary: JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 14, NO. 4, AUGUST 2005 847
Reconsideration of Low Reynolds Number
Flow-Through Constriction Microchannels
Using the DSMC Method
Alina A. Alexeenko, Sergey F. Gimelshein, and Deborah A. Levin
Abstract--Gaseous flow through a microchannel is treated
numerically and analytically in order to assess pressure and mass
flow losses due to a constriction of a finite length. Numerical
modeling of two-dimensional (2-D) microchannel flow in the slip
and transitional regimes is carried out using the direct simulation
Monte Carlo (DSMC) method. The prediction of pressure losses
and mass flow based on a simple analytic model for constriction
microchannel flow are found to be in excellent agreement with
DSMC simulations. Constriction has a dramatic effect on pressure
loss and mass flow rate for the considered cases. The DSMC results
indicate that the flow in the constriction microchannel separates
in the transition section, but the separation does not significantly
impact pressure distributions. [1189]
Index Terms--Fluid flow, gases, losses, microfluidics, modeling,
Monte Carlo methods, numerical analysis, pressure effects,

  

Source: Alexeenko, Alina - School of Aeronautics and Astronautics, Purdue University

 

Collections: Engineering