Thermal study of the laminar flow of a Bingham plastic in a horizontal circular pipe maintained at uniform temperature
Multi-scale and/or multi-disciplinary approach to process-product innovation
CFD & Multiscale Modelling in Chemical Engineering (T3-4P)
Keywords: Bingham fluid, yield stress, forced convection, hypothesis of Boussinesq
The Bingham fluid is a viscoplastic medium which verifies the general laws of mechanic of continuous mediums. It has a particular nonlinear behaviour law and is the simplest representation of fluids characterized by a yield stress.
The purpose of this work is the numerical study by means of finite volume method, of heat transfer in forced convection of an incompressible viscoplastic fluid in a circular pipe maintained at uniform temperature. All the physical properties of the fluid considered are supposed to be constant except for the density for which the hypothesis of Boussinesq is adopted. A subroutine based on the model of Papanastasiou was developed, in order to take into account the rheological behaviour of the Bingham type.
The study is based on the influence of Reynolds, Bingham and Prandtl numbers on the coefficient of heat transfer represented by the Nusselt number. The comparison between the obtained results and those of Taegee Min et al. as well as those of George C. et al. proves to be satisfactory.
Presented Tuesday 18, 13:30 to 15:00, in session CFD & Mutliscale Modelling in Chemical Engineering (T3-4P).
