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contributor authorKumar Hotta, Tapano
contributor authorBalaji, C.
contributor authorVenkateshan, S. P.
date accessioned2017-05-09T01:09:44Z
date available2017-05-09T01:09:44Z
date issued2014
identifier issn0022-1481
identifier otherht_136_10_104503.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/155395
description abstractSteady state experiments are conducted in a low speed horizontal wind tunnel under mixed convection for five discrete heat sources (aluminum) of nonidentical sizes arranged at different positions on a substrate board (bakelite) to determine the optimal configuration. The optimal configuration is one for which the maximum temperature excess (difference between the maximum temperature among the heat sources of that configuration, and the ambient temperature) is the lowest among all the other possible configurations and is determined by a heuristic nondimensional geometric parameter خ». The maximum temperature excess is found to decrease with خ», signifying an increase in heat transfer coefficient. In view of this, the configuration with highest خ» is deemed to be the optimal one. The effect of surface radiation on the heat transfer characteristic of heat sources is also studied by painting their surface with black, which reduces their temperature by as much as 12%. An empirical correlation is developed for the nondimensional maximum temperature excess (خ¸) in terms of خ», by taking into account the effect of surface radiation. The correlation when applied for highest خ» of the configuration returns the minimum value of خ¸ at the optimal condition, which is a key engineering quantity that is sought in problems of this class.
publisherThe American Society of Mechanical Engineers (ASME)
titleOptimal Distribution of Discrete Heat Sources Under Mixed Convection—A Heuristic Approach
typeJournal Paper
journal volume136
journal issue10
journal titleJournal of Heat Transfer
identifier doi10.1115/1.4027350
journal fristpage104503
journal lastpage104503
identifier eissn1528-8943
treeJournal of Heat Transfer:;2014:;volume( 136 ):;issue: 010
contenttypeFulltext


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