Stagnation point region overshoot is the augmentation of total heat transfer owing to the presence of insulation at the stagnation point region of an otherwise isothermal body. Evidence summarized by the present work indicates that this paradoxical event can be made to occur. The overshoot is due to the singularly high temperature gradient that is impressed upon the boundary layer just as it arrives at the leading edge of the heated surface after passing over the insulated central portion. The evidence comprises experimental results based on the mass-heat analog using sublimation of naphthalene and on theoretical boundary layer calculations using a method of local similarity. In the experiments, the insulated surfaces were simulated with inert wax, and isothermal regions with active naphthalene. The surfaces were circular disks facing uniform airstreams. The finding was that the total rate of mass transfer would be as much as 10 percent greater than that of a fully active disk if the radius of the central inert region were half the radius of the disk. Put another way, if only the 30-percent annulus at the outer edge of the disk were active, it would transfer mass at the same rate as the completely active disk under the same circumstances of flow. Corresponding results are expected from analogically heated disks operating with Prandtl number near unity and disk Reynolds number ranging from 5000 to 250,000.
Skip Nav Destination
Article navigation
Research Papers
Evaluation of the Stagnation Point Region Overshoot
H. H. Sogin
H. H. Sogin
Tulane University, New Orleans, LA 70118
Search for other works by this author on:
H. H. Sogin
Tulane University, New Orleans, LA 70118
J. Heat Transfer. Feb 1992, 114(1): 73-78 (6 pages)
Published Online: February 1, 1992
Article history
Received:
October 18, 1990
Revised:
July 1, 1991
Online:
May 23, 2008
Citation
Sogin, H. H. (February 1, 1992). "Evaluation of the Stagnation Point Region Overshoot." ASME. J. Heat Transfer. February 1992; 114(1): 73–78. https://doi.org/10.1115/1.2911270
Download citation file:
Get Email Alerts
Cited By
On Prof. Roop Mahajan's 80th Birthday
J. Heat Mass Transfer
Thermal Hydraulic Performance and Characteristics of a Microchannel Heat Exchanger: Experimental and Numerical Investigations
J. Heat Mass Transfer (February 2025)
Related Articles
An Improved Correlation of Stagnation Point Mass Transfer From Naphthalene Circular Disks Facing Uniform Airstreams
J. Heat Transfer (August,1991)
Effect of Flow Angle-of-Attack on the Local Heat/Mass Transfer From a Wall-Mounted Cube
J. Heat Transfer (August,1994)
Heat and Mass Transfer With Dehumidification in Laminar Boundary Layer Flow Along a Cooled Flat Plate
J. Heat Transfer (August,1993)
Local Heat/Mass Transfer Distributions on the Surface of a Wall-Mounted Cube
J. Heat Transfer (November,1991)
Related Proceedings Papers
Related Chapters
Hydraulic Resistance
Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications
Heat Transfer Enhancement by Using Nanofluids in Laminar Forced Convection Flows Considering Variable Properties
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)
Laminar Fluid Flow and Heat Transfer
Applications of Mathematical Heat Transfer and Fluid Flow Models in Engineering and Medicine