Volume 15, Issue 1 (3-2015)                   Modares Mechanical Engineering 2015, 15(1): 323-331 | Back to browse issues page

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Ghassabi G, Kahrom M. Experimental Investigation of dissimilarity between heat transfer and momentum transfer in a distributed boundary layer using design of experiments method. Modares Mechanical Engineering 2015; 15 (1) :323-331
URL: http://mme.modares.ac.ir/article-15-8169-en.html
Experimental Investigation of dissimilarity between heat transfer and momentum transfer in a distributed boundary layer using design of experiments method
Ghodrat Ghassabi , Mohsen Kahrom * 1
1- Professor of Mechanical Engineering/ Thermodynamics and Fluid Mechanics
Abstract:   (5304 Views)
In previous studies, there is no comprehensive experimental study that has evaluated dissimilarity between heat transfer and momentum transfer for all the interactions between effective variables. On the other hand, when a rectangular cylinder is located near a flat plate, skin friction coefficient and heat transfer coefficient are effected some variables that change in an extensive range. Therefore, testing all possible combinations of effective variables will not be reasonable. In this paper, maximum and minimum of skin friction coefficients and heat transfer coefficients were determined using robust Taguchi design. Design of experiments method was applied for decreasing the number of experiments without losing the required information in the first step. Then, experiments were performed in a wind tunnel, the maximum speed of which was 13 m/s. Finally, skin friction coefficient and heat transfer coefficient were optimized using Taguchi method and Minitab software. Results showed that dissimilarity between heat transfer and momentum transfer has occurred for all the possible combinations of the effective variables. Additionally, the gap height between the rectangular cylinder and flat plate was the most effective variable on generating the dissimilarity.
Keywords: Skin friction coefficient, Heat Transfer Coefficient, dissimilarity, Taguchi
Full-Text [PDF 462 kb]   (5544 Downloads)    
Article Type: Research Article | Subject: Heat & Mass Transfer
Received: 2014/10/3 | Accepted: 2014/11/9 | Published: 2014/12/14
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