The temperature field above a concentrated heat source on a vertical adiabatic surface
Abstract
Detailed measurements are presented for the laminar temperature field above a highly localized heat source on a transparent vertical adiabatic surface in water through the use of thermocouples and a Schlieren optical system. The physical parameters measured for a range of heat source strength are the surface temperature decay directly above the heat source, the centerplane-normal temperature distribution in the fluid, the spanwise-surface temperature distribution, the spanwise and normal thermal boundary-layer thicknesses, and the variation of the source temperature with heat flux. Results of thermocouple measurements indicate that the surface temperature directly above a concentrated heat source follows a power-law variation with downstream distance, with the exponent of the parameter x (vertical distance above heat source) being equal to -0.77. The Schlieren photographs reveal that the thermal boundary layer thickness grows about linearly with x in the direction normal to the surface and very slowly (exponentially, in the spanwise direction, which is consistent with the detailed thermocouple measurements.
- Publication:
-
International Journal of Heat and Mass Transfer
- Pub Date:
- October 1977
- Bibcode:
- 1977IJHMT..20.1059C
- Keywords:
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- Adiabatic Conditions;
- Boundary Layer Flow;
- Heat Sources;
- Temperature Distribution;
- Three Dimensional Flow;
- Flow Geometry;
- Flow Visualization;
- Flux Density;
- Thermocouples;
- Fluid Mechanics and Heat Transfer