INFLUENCE OF SOME VARIABLE PARAMETERS ON HORIZONTAL ELLIPTIC MICRO-CHANNELS WITH INTERNAL LONGITUDINAL FINS

Authors

  • IK Adegun DEPARTMENT OF MECHANICAL ENGINEERING, FACULTY OF ENGINEERING AND TECHNOLOGY, UNIVERSITY OF ILORIN, ILORIN, NIGERIA
  • TS Jolayemi DEPARTMENT OF MECHANICAL ENGINEERING, INSTITUTE OF TECHNOLOGY, KWARA STATE POLYTECHNIC, ILORIN, NIGERIA
  • OO Olayemi DEPARTMENT OF MECHANICAL ENGINEERING, FACULTY OF ENGINEERING AND TECHNOLOGY, UNIVERSITY OF ILORIN, ILORIN, NIGERIA
  • OT Popoola DEPARTMENT OF MECHANICAL ENGINEERING, FACULTY OF ENGINEERING AND TECHNOLOGY, UNIVERSITY OF ILORIN, ILORIN, NIGERIA

DOI:

https://doi.org/10.4314/njt.322.666

Keywords:

Ellipse, Micro-channels, internal fins, Heat transfer, Fluid flow

Abstract

The study investigates the laminar flow and heat transfer characteristics in elliptic micro-channels of varying axis ratios and with internal longitudinal fins, operating in a region that is hydrodynamically and thermally fully developed; purposely to determine the effects of some salient fluid and geometry parameters such as Reynolds number, Prandtl number, aspect ratio ( and fin heights on flow pattern and rate of heat transfer. Numerical method using the finite difference technique was adopted for the solution. A code in Quick Basic was developed to generate the results. Results show that fin height of H=0.6 provided the optimum heat transfer enhancement for the configuration of e = 0, e= 0.433 and e=0.714; for e=0.866, fin height of H= 0.4 is tolerable. Result also show that Nusselt number increases with Reynolds number for all axis ratios investigated. However, at Re=200 a slight trough was observed in Nusselt number Versus Reynolds number relationship indicating a critical flow condition. It was also established that at , Nusselt number and bulk fluid temperature, are independent of fluid properties.

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Research papers of General Interest

How to Cite

INFLUENCE OF SOME VARIABLE PARAMETERS ON HORIZONTAL ELLIPTIC MICRO-CHANNELS WITH INTERNAL LONGITUDINAL FINS. (2013). Nigerian Journal of Technology, 32(2), 350-362. https://doi.org/10.4314/njt.322.666