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Numerical Simulation of Single Phase Liquid Flow in Narrow Rectangular Channels With Structured Roughness Walls

[+] Author Affiliations
Rishabh R. Srivastava, Nicholas M. Schneider, Satish G. Kandlikar

Rochester Institute of Technology, Rochester, NY

Paper No. ICNMM2009-82255, pp. 689-695; 7 pages
doi:10.1115/ICNMM2009-82255
From:
  • ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels
  • Pohang, South Korea, June 22–24, 2009
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 978-0-7918-4349-9 | eISBN: 978-0-7918-3850-1
  • Copyright © 2009 by ASME

abstract

Laminar flow in rough channels is receiving considerable attention recently due to its application in microfluidic devices. Developing a proper understanding of the fundamental effects of roughness in narrow channels is essential. In the present study, single-phase laminar flow of an incompressible fluid through narrow rectangular channels with structured roughness walls is investigated numerically using CFD software, FLUENT. The results for smooth channel geometries are first compared with the previously validated experimental data of Brackbill [1]. Triangular ribbed roughness structures, defined by pitch and height, are incorporated in the CFD model and the fully developed region is analyzed. Pressure drop results from CFD simulations are presented and the friction factor, f, is calculated for comparison with published experimental results of Brackbill and Kandlikar [2–4] and Brackbill [1]. The validated numerical scheme will be used in future work for the evaluation of the effect of different roughness features on laminar flow.

Copyright © 2009 by ASME

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