HEAT-TRANSFER AND FLOW OF A THERMODEPENDENT AND YIELD STRESS FLUID

In this paper, we study the flow of a fluid possessing a yield stress, in a cylindrical pipe being the wall heated with a constant flux; exp erimental and numerical results being presented here. We are intereste d in the influence of the different parameters on the Nusselt number, and in the pressure variation. We propose a model which enables us to estimate the Nusselt number and pressure variation, which takes into a ccount the variation of the physical properties due to temperature var iations. The proposed correlations agree well with experimental measur ement.