Abstract
This paper discusses the forced convection problem for the steady laminar fully developed flow in a straight channel when the fluid properties are functions of temperature. The energy equation has been analysed by taking into account the effect of compression work as well as that of viscous dissipation. The complex variable technique is used to tackle the case of an arbitrary channel. The constant property and variable property flows characteristics have been compared. For illustration some constant property flows have been obtained in a closed form and the results investigated by taking into account the effect of compression work have been compared with those obtained by neglecting it. For an arbitrary cross-section, the expressions giving the difference of the wall temperature from the initial temperature and the temperature drop in the duct, have been derived. In the concluding section, the results have been discussed.
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