INFLUENCE OF SOME VARIABLE PARAMETERS ON HORIZONTAL ELLIPTIC MICRO-CHANNELS WITH INTERNAL LONGITUDINAL FINS
No Thumbnail Available
Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
Faculty of Engineering, University of Nigeria, Nsukka
Abstract
he study investigates the laminar flow and heat transfer characteristics in elliptic microchannels 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 Pr >5, Nusselt number
and bulk fluid temperature, are independent of fluid properties.
Description
Keywords
Ellipse, Micro-channels, internal fins, Heat transfer, Fluid flow
Citation
Adegun, I. K., Jolayemi, T. S., Olayemi, O. O., & Popoola, O. T. (2013). Influence of Some Variable Parameters on Horizontal Elliptic Micro-Channels with Internal Longitudinal Fins. Nigerian Journal of Technology, 32(2), 350-362.