The effect of precursory cooling on conduction-controlled rewetting of both slab and solid cylinder is analyzed by the heat balance integral method. A constant heat transfer coefficient is assumed in the wet region behind the wet front, while an exponentially decaying heat flux is assumed in the dry region ahead of the wet front. The physical problem is characterized by two dimensionless constants describing the extent of precursory cooling and three dimensionless numbers, namely, Peclet number, Biot number, and the nondimensional temperature. Results of the present solution are found to be in good agreement with other analytical solutions obtained through the Weiner–Hopf technique and the separation of variables as well as with the published experimental data for different coolants over a varied range of coolant flow rate. It is seen that precursory cooling increases the rewetting velocity particularly at higher flow rates. If it is neglected, the model grossly underpredicts the quench velocities.
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Rewetting Analysis of Hot Vertical Surfaces With Precursory Cooling by the Heat Balance Integral Method
S. K. Sahu,
S. K. Sahu
Graduate Student
Department of Mechanical Engineering,
e-mail: sksahu@mech.iitkgp.ernet.in
Indian Institute of Technology Kharagpur
, Kharagpur-721302, India
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P. K. Das,
P. K. Das
Professor
Department of Mechanical Engineering,
e-mail: pkd@mech.iitkgp.ernet.in
Indian Institute of Technology Kharagpur
, Kharagpur-721302, India
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S. Bhattacharyya
S. Bhattacharyya
Professor
Department of Mechanical Engineering,
e-mail: souvik@mech.iitkgp.ernet.in
Indian Institute of Technology Kharagpur
, Kharagpur-721302, India
Search for other works by this author on:
S. K. Sahu
Graduate Student
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur
, Kharagpur-721302, Indiae-mail: sksahu@mech.iitkgp.ernet.in
P. K. Das
Professor
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur
, Kharagpur-721302, Indiae-mail: pkd@mech.iitkgp.ernet.in
S. Bhattacharyya
Professor
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur
, Kharagpur-721302, Indiae-mail: souvik@mech.iitkgp.ernet.in
J. Heat Transfer. Feb 2008, 130(2): 024504 (5 pages)
Published Online: February 15, 2008
Article history
Received:
June 8, 2006
Revised:
June 18, 2007
Published:
February 15, 2008
Citation
Sahu, S. K., Das, P. K., and Bhattacharyya, S. (February 15, 2008). "Rewetting Analysis of Hot Vertical Surfaces With Precursory Cooling by the Heat Balance Integral Method." ASME. J. Heat Transfer. February 2008; 130(2): 024504. https://doi.org/10.1115/1.2787021
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