Accession Number:

AD0687056

Title:

UNSTEADY-STATE CONVECTIVE HEAT EXCHANGE AND HYDRODYNAMICS IN CHANNELS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1969-01-20

Pagination or Media Count:

21.0

Abstract:

The report reviews previously published theoretical and experimental studies treating nonsteady-state heat transfer and hydrodynamics in channels. On the basis of the review the following conclusions are drawn 1 The flow pattern during detached and attached flow in channels differs from the quasisteady-state pattern. This can result in a significant deviation of the heat transfer and hydraulic resistance from the quasisteady-state calculations. 2 In steady-state hydrodynamics and thermal nonsteady-state conditions, the heat transfer can differ from quasisteady-state values as a result of the nonsteady-state thermal conductivity. 3 The published theoretical investigations are qualitative and are presented in approximations. The theoretical investigation presents very complex mathematical problems. 4 Experimental studies of nonsteady-state hydrodynamics and heat transfer in channels are still in the initial stages of investigation. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE