THERMAL SCIENCE

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Rajendran Vinoth

,

Duraisamy Senthil Kumar

NUMERICAL STUDY OF INLET CROSS-SECTION EFFECT ON OBLIQUE FINNED MICROCHANNEL HEAT SINK

ABSTRACT
The current study is focused on the heat transfer and flow characteristics of an oblique finned micro-channel heat sink with different inlet cross-sections. Water and Al2O3-water nanofluid with 0.25% volume fraction were used as heat trans¬fer fluids. The oblique finned micro-channel heat sinks of size 48 × 80 mm were designed with three different inlet cross-sections, namely square, semicircle and trapezoidal. The ANSYS FLUENT simulations validated with the aid of an existing experimental work. The flow regime in micro-channel heat sink is constrained to laminar flow in the study. The three inlet cross-sections have been investigated by varying Reynolds number for Water and Al2O3-water nanofluid. The trapezoidal cross-section with average heat transfer rate 3.35% and pressure drop 8.6% is more efficient than other cross-sections due to larger wall area and effective entrance length. The oblique finned micro-channel heat sink with the trapezoidal cross-section is suitable for the micro-electronic cooling systems.
KEYWORDS
oblique finned microchannel, CFD, nanofluid, trapezoidal cross-section, heat transfer rate
PAPER SUBMITTED: 2016-11-19
PAPER REVISED: 2017-05-23
PAPER ACCEPTED: 2017-05-28
PUBLISHED ONLINE: 2017-06-04
DOI REFERENCE: https://doi.org/10.2298/TSCI161119133V
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 6, PAGES [2747 - 2757]
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Numerical study of inlet cross-section effect on oblique finned microchannel heat sink

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