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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

ICE GROWTH IN LAMINAR FLOW THROUGH A CHANNEL WITH TWO PARALLEL FLAT WALLS

Get access (open in a dialog) DOI: 10.1615/IHTC6.3660
pages 173-178

Resumo

The problem of water ice growth in the plane laminar flow in the channel between two vertical and parallel walls is solved analytically and verified experimentally. The boundary conditions on the outer surfaces of the walls are non-symmetrical: one (cold) surface is maintained at a constant temperature TC lower than the fluid freezing temperature TF, while the second one is either adiabatic or isothermal (with the temperature TH>TF). The solutions of the problem of channel gap freezing were numerically obtained for the case when product PrEc<<l (Pr = CpfηFF is Prandtl number and Ec = U2/[cpf(TF−TC)] is Eckert number). The initial temperature was assumed constant, and equal to TH, throughout the channel configuration except for the outer surface of the cold wall, where the temperature TC was maintained.

The relationships for the ice thickness variations and the time required for the gap sealing are presented in terms of the associated parameters: Stefan number, Ste = cpi (TF−TC)/Δhm; temp, ratio, ζ = (TH−TF)/(TF−TC); and properties of the walls (three different systems of walls were considered, namely: plexiglass-copper, steel-steel and steel-copper). Experimental results are compared with the theory for the case of the plexiglass-copper system only.