Nano Science and Technology Institute
MSM 98
MSM 98
Technical Proceedings of the 1998 International Conference on Modeling and Simulation of Microsystems
Chapter 11: Applications: Microfluidics

Computational Two-Dimensional Finite-Element Analysis of Flow Behavior Inside Microfluidic Amplifiers

Authors:E.W. Simões, R. Furlan and J.N. Zemel
Affilation:Escola Politecnica da Universidade de Sao Paulo, BR
Pages:480 - 485
Keywords:micromachining, microfluidic amplifier, flow behavior
Abstract:Two-dimensional finite-element analysis was conducted using the commercial ANSYS (FLOTRAN) package to investigate nitrogen flow inside of two types of microfluidic amplifiers (wall attachment and jet deflection). Our simulations demonstrate that for supply pressures higher than 300 kPa these devices can operate with laminar flow conditions in the supply nozzle, choked flow conditions at the output of the supply nozzle and supersonic flow in the interaction region. This latter condition leads to the formation of shock waves. Although the analyzed microfluidic amplifiers present similar intemal flow behavior, the jet deflection device (with vents) has higher output velocities than the wall attachment device.
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