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research-article

Heat Transfer Enhancement in a Radial Sink Flow Cooling System

[+] Author and Article Information
Medhat Sorour

Faculty of Engineering, Mechanical Engineering Department, Alexandria University, Alexandria, Egypt
sorour1950@gmail.com

Mohamed Fayed

Faculty of Engineering, Mechanical Engineering Department, Alexandria University, Alexandria, Egypt
mohamed.fayed@aum.edu.kw

Noha Alaa El-Din

Faculty of Engineering, Mechanical Engineering Department, Pharos University, Alexandria, Egypt
noha.alaaeldin@pua.edu.eg

1Corresponding author.

ASME doi:10.1115/1.4041883 History: Received August 13, 2018; Revised October 19, 2018

Abstract

The steady forced convection between two stationary parallel circular disks in a radial sink flow cooling system is investigated numerically. This investigation is devoted to study the effect of swirling flow and /or grooved surface on the heat transfer and on the thermo-hydraulic parameter. A wide range of inlet Reynolds number (Re), 100 = Re = 105, inlet swirl ratio (S), 0 = S = 20 and the gap spacing ratio (G), 0.01 = G = 0.1 is considered in the study. The rectangular grooves are characterized by ribs with three dimensionless lengths; height (t/d), 0.1 = t/d = 0.35, the interval spacing between ribs (i /Ro), 0.025 = i /Ro = 0.1, and the width of rib (w/Ro), 0.025 = w/Ro = 0.1. The results of the heat transfer analysis indicate that swirling flow enhance the cooling system for plain and ribbed surfaces. However, the thermal hydraulic study indicated that swirling flow is beneficial for plain surfaces only. And the ribs are beneficial with pure radial inflow.

Copyright (c) 2018 by ASME
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