Rewetting analysis of hot surfaces with internal heat source by the heat balance integral method |
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Authors: | S K Sahu P K Das Souvik Bhattacharyya |
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Institution: | (1) Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, 721302, India |
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Abstract: | A two region conduction-controlled rewetting model of hot vertical surfaces with internal heat generation and boundary heat
flux subjected to constant but different heat transfer coefficient in both wet and dry region is solved by the Heat Balance
Integral Method (HBIM). The HBIM yields the temperature field and quench front temperature as a function of various model
parameters such as Peclet number, Biot number and internal heat source parameter of the hot surface. Further, the critical
(dry out) internal heat source parameter is obtained by setting Peclet number equal to zero, which yields the minimum internal
heat source parameter to prevent the hot surface from being rewetted. Using this method, it has been possible to derive a
unified relationship for a two-dimensional slab and tube with both internal heat generation and boundary heat flux. The solutions
are found to be in good agreement with other analytical results reported in literature. |
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