University of Khartoum

Numerical Study of Possibility of Using Shape Memory Alloy in Louvered Fins Radiators

Numerical Study of Possibility of Using Shape Memory Alloy in Louvered Fins Radiators

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Title: Numerical Study of Possibility of Using Shape Memory Alloy in Louvered Fins Radiators
Author: Mohamed, Khobib Abdelhafeiz
Abstract: The objective of the research was to enhance the heat transfer rate in automotive radiator by using shape memory alloy as active louvered fin. This thesis presents details of numerical study which were obtained by solving the two-dimensional Navier-Stokes equations with ANSYS Fluent 14.0. A two-dimensional model was constructed and Standard K-epsilon model was used for the models. The research has two major focuses relative to the performance of the louvered fin compact heat exchanger. The first is to determine the effect of louver walls temperature on optimum louver angle. The second is to study the ability of using shape memory alloys as active louvered fin to improve the heat transfer rate. Nine heat exchangers differing in values of fin pitch, louver angle and louver walls temperature were studied. The results indicated that the optimum angle for louver fins is independent of louver walls temperature and depends on fin pitch and Reynolds number. For fin pitch of 1.65 mm the optimum angle was 15 ̊ and for fin pitch of 2.02 and 3.25 mm it was 27 ̊. For these results the application of shape memory alloy is not required to enhance the heat transfer rate due to the fact that optimum angle is not affected by the louver fin temperature.
Description: 64page
URI: http://khartoumspace.uofk.edu/123456789/16907
Date: 2015-11-04


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