Author/Authors :
Sheikhzadeh، G. A نويسنده , , Ebrahim Qomi، M نويسنده Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran. , , Hajialigol، N نويسنده Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran. , , Fattahi، A نويسنده Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran. ,
Abstract :
The fluid flow and heat transfer in a three-dimensional microchannel
filled with Al
2 O 3
- water nanofluid is numerically investigated. The
hybrid scheme is used to discretize the convection terms and
SIMPLER algorithm is adopted to couple the velocity and pressure
field in the momentum equations. The temperature fields, variation of
horizontal velocity along the centre line of the channel, average
Nusselt number and the thermal resistance in different aspect ratios
are presented. It is observed that aspect ratio mainly affected the
temperature gradient as well as heat transfer. Analyzing the results of
numerical simulations indicates that with increasing aspect ratio,
horizontal velocity along the centre line increased and then, average
Nusselt number and the inlet and outlet thermal resistance decrease in
the microchannel.
