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Title: Heat transfer and sensitivity analysis in a double pipe heat exchanger filled with porous medium
Authors: Milani Shirvan, Kamel 
Mirzakhanlari, Soroush 
Kalogirou, Soteris A. 
Öztop, Hakan F. 
Mamourian, Mojtaba 
Major Field of Science: Engineering and Technology
Field Category: Other Engineering and Technologies
Keywords: Response surface methodology;Sensitivity analysis;Heat exchanger effectiveness double pipe;Heat exchanger;Heat transfer;Porous medium
Issue Date: Nov-2017
Source: International Journal of Thermal Sciences, 2017, vol. 121, pp. 124-137
Volume: 121
Start page: 124
End page: 137
Journal: International Journal of Thermal Sciences 
Abstract: In this paper, 2-D numerical investigation and sensitivity analysis are performed on heat transfer rate and heat exchanger effectiveness of a double pipe heat exchanger filled with porous medium. The Darcy -Brinkman-Forchheimer model is applied to model the flow field in the porous zone. The sensitivity analysis is performed utilizing the Response Surface Methodology. The studied parameters are: Reynolds number (50 <= Re <= 250), Darcy number (10(-5) <= Da <= 10(-3)), temperature difference between hot and cold fluids (30 <= Delta T <= 70) and the porous substrate thickness (1/3 <= delta <= 1). The obtained results showed that enhancement of the Nusselt number due to the increase in Reynolds and Darcy numbers is in the vicinity of the 77.84% for the case with delta = 2/3 and Da =10(-5) to 10(-3), and 203.25% for the case with delta =1 and Re = 50 to 250. Furthermore, increasing porous substrate thickness reduces the mean Nusselt number until delta = 2/3 and then increases it. In addition, it is found that the heat exchanger effectiveness increases with the Re number and reduces with enhancement of the Da number. The sensitivity analysis showed that the sensitivity of the mean Nusselt number to the Re and Da numbers and the porous substrate thickness is positive, while the sensitivity of the heat exchanger effectiveness to the Re number is positive but to the Da number is negative.
ISSN: 1290-0729
DOI: 10.1016/j.ijthermalsci.2017.07.008
Rights: © Elsevier
Type: Article
Affiliation : Cyprus University of Technology 
Ferdowsi University of Mashhad 
Islamic Azad University 
Firat University 
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