Accession Number : AD0687056

Title :   UNSTEADY-STATE CONVECTIVE HEAT EXCHANGE AND HYDRODYNAMICS IN CHANNELS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kalinin,E. K.

Report Date : 20 JAN 1969

Pagination or Media Count : 21

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)

Descriptors :   (*HYDRODYNAMICS, LAMINAR FLOW), (*CONVECTION(HEAT TRANSFER), LAMINAR FLOW), APPROXIMATION(MATHEMATICS), THEORY, PIPES, USSR

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE