Convective cooling of a thin flat plate in laminar and turbulent flows
Por:
Vallejo A., Treviño C.
Publicada:
1 ene 1990
Resumen:
This paper deals with the analysis for the cooling of a flat plate in a convective flow, taking into account the longitudinal heat conduction through the plate. The energy balance equations reduce to a single one-parameter integro-differential equation, for the evolution of the temperature of the plate. An asymptotic analysis based on the multiple scale technique is used iu order to obtain an analytical solution of the studied problem. Two time scales appear in the asymptotic limit of a very good conducting plate. At time t = 0, the plate at a temperature different from that of the fluid is placed parallel to the fluid stream. For large but finite plate thermal conductivity, a rapid transient generates and the temperature adjusts itself to a pseudo-equilibrium condition, needed for the slow further evolution of the plate temperature. Both laminar and turbulent boundary layer flows are considered and the three term asymptotic solution is compared with the numerical solution of the governing equation. A very good agreement is achieved even for values of the heat transfer parameter of the order of unity. © 1990.
Filiaciones:
Vallejo A.:
Departamento de Fluidos, Térmica. Facultad de Ingenieria, UNAM, 04510 Mexico D.F., Mexico
Treviño C.:
Departamento de Fluidos, Térmica. Facultad de Ingenieria, UNAM, 04510 Mexico D.F., Mexico
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