28 September 2001 Simulation of interfacial dynamics of time-dependent converging flows in microchannels
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Proceedings Volume 4560, Microfluidics and BioMEMS; (2001) https://doi.org/10.1117/12.443048
Event: Micromachining and Microfabrication, 2001, San Francisco, CA, United States
Abstract
With the growing interest and development of microfluidic systems, the need for micro-scale laminar flow mixing techniques is evident. Traditional mixing methods often rely upon turbulent flow for mixing which is generally not present on the micro-scale and so alternative approaches must be sought. In this work we investigate the potential for destabilizing the interface between converging flows using flow pulsation. A 3-D computational model of the converging flow at a 90 degrees junction is developed using the Fluent CFD software whereby the time-dependent behavior of the interface can be studied downstream of the junction. The interface is tracked using the Volume-of-Fluid method. Our results show the formation of a complex, evolving interfacial distortion which propagates and persists downstream of the junction; the degree of distortion observed suggests the possible onset of a hydrodynamic instability. The results also show that the complexity of the interfacial structure is only significant at higher frequencies (order of kHz) which is appropriate for MEMS pumping devices.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. D. Prabhu, R. D. Prabhu, Darren L. Hitt, Darren L. Hitt, } "Simulation of interfacial dynamics of time-dependent converging flows in microchannels", Proc. SPIE 4560, Microfluidics and BioMEMS, (28 September 2001); doi: 10.1117/12.443048; https://doi.org/10.1117/12.443048
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