NUMERICAL STUDY OF PRESSURE DROP AND HEAT TRANSFER IN A STRAIGHT RECTANGULAR AND SEMI CYLINDRICAL PROJECTIONS MICROCHANNEL HEAT SINK

Year 2017, Volume: 3 Issue: 5, 1453 - 1465, 19.09.2017

Mohammad Zunaıd

https://doi.org/10.18186/journal-of-thermal-engineering.338903

Cited By: 14

Abstract

The
heat transfer and pressure drop characteristics of a straight rectangular and
semi cylindrical projections microchannel heat sink were investigated. The heat
sinks, made of copper, were aligned in row as a cluster of 21 microchannels, 231 µm wide and
713 µm deep. Water was used as cooling fluid and was made to flow through the
channels. A three dimensional analysis was done for Reynolds number ranging
between 200 to 1000 with constant heat flux of 10⁶ W/m²
defined relative to the platform area of the heat sink. The temperature rise
and pressure drop of the fluid in straight microchannel heat sink was evaluated
using ANSYS-CFX package and was validated using experimental data. Similar
analysis was done for semi cylindrical projections microchannel heat sink by
solving the conjugate heat transfer problem. A comparison of heat transfer and
pressure drop between rectangular and semi cylindrical projections microchannel
was done and the results were laid out. Results shows that heat transfer increases
with the use of semi cylindrical projections microchannel heat sink.

Keywords

Heat Sink, Microchannel, Heat Transfer, Reynolds Number, Conjugate Heat Transfer, Semi Cylindrical Projections

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