Experimental and analytical study of transient heat transfer for turbulent flow in a circular tube
Abstract
A circular tube cooled by constant turbulent flow of water was heated stepwise with time. Variation of heat-transfer coefficient was obtained. When the tube was heated prior to the step increase of heat input, a maximum appeared in the variation of heat-transfer coefficient. Reason for the maximum is discussed. Numerical analysis is made for the same configuration as that of the experiment. The numerical results agree well with the experimental ones. An analytical expression for the variation of heat-transfer coefficient is obtained. Time required for the heat-transfer coefficient to reach steady state is studied.
- Publication:
-
International Journal of Heat and Mass Transfer
- Pub Date:
- May 1977
- Bibcode:
- 1977IJHMT..20..443K
- Keywords:
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- Circular Tubes;
- Convective Heat Transfer;
- Heat Transfer Coefficients;
- Transient Heating;
- Turbulent Heat Transfer;
- Liquid Cooling;
- Numerical Analysis;
- Steady State;
- Time Dependence;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer