Numerical Simulation of Turbulent Forced Convection Coupled to Heat Conduction in Square Ducts

Abstract

In the present work, the numerical simulation was adopted to resolve the problem of the turbulent forced convection coupled to heat conduction in a square cross-section duct. The governing equations for turbulent convection are the continuity, momentum, and energy equations. These equations are coupled to heat conduction comings through of four plates situated around of the channel flow. The plates among itself with thermal resistance of ideal contact are coupled. Two turbulence models to resolve the momentum equations and one model to resolve the energy equation were used. To determine the profiles of velocity, the models of turbulence, k-ε Non Linear Eddy Viscosity Model (NLEVM) and Reynolds Stress Model (RSM) were adopted. The fluid temperature field was determined from the model Simple Eddy Diffusivity (SED). The dimensionless energy equation was developed in a code of programming FORTRAN. The models have been validated in base the experimental and numerical results of literature. Finally, the results of this investigation allow evaluating the fluid temperature field for different square cross-sectional sections throughout of the main flow direction, which is influenced mainly by the temperature distribution at the wall.