STABILIZED NONSTATIONARY HEAT TRANSFER IN A CHANNEL WITH A BOUNDARY REGIME ON ITS SURFACE, THAT VARIES CYCLICALLY WITH TIME

Consideration has been given to laminar fl ow of a liquid with constant properties in a channel on whose surface
the temperature or density of the heat fl ux vary with time by a periodic law. An analytical solution to the problem of
convective heat transfer in general form has been obtained, using which it has been established that heat transfer
ceases to depend on the axial coordinate away from the inlet of the heated portion. Relations have been found
to calculate stabilized heat transfer. It has been shown that at a high frequency of the process, a nonstationary
stabilized heat-transfer coeffi cient varies noticeably over the period, however, its stabilization with time occurs as
the frequency is reduced. Data on fully stabilized heat transfer have been given for various shapes of the channel,
fl ow regimes, and boundary conditions.
   
Author:  M. I. Supel′nyak
Keywords:  laminar channel fl ow, nonstationary cyclic heat transfer, stabilized heat transfer, complex non-selfadjoint Sturm–Liouville problem
Page:  608