ABSTRACT

Numerical analysis is conducted to investigate the fluid flow and heat transfer characteristics in a laminar plane wall jet with rib. The rib is placed at the bottom wall. All walls are assumed adiabatic. External cold fluid flows inside the wall through an opening at the bottom of the vertical wall and is exited through the right side opening. Fluid also enters through the top entrainment boundary. The two dimensional continuity, Navier-Stokes equation and energy equation are solved by the finite difference method. Uniform grids are used in entire computational domain. The discritized equations with proper boundary conditions of numerical solutions are sought by Successive under relaxation method. It has been done on the basis of stream function and vorticity formulation. The flow field is investigated by numerical simulations for fluid flowing with a Reynolds number (Re) in the range 30≤Re≤80, 0.0≤Ri≤1.2 and Rib height = 0.22 to 0.33. Numerical results are obtained for different values of Reynolds number, Prandlt Number, Richardson Number, Rib height and Rib location. Heat transfer rates at the heated Rib are presented in terms of average Nusselt Number. It is observed that maximum heating efficiency is achieved with this configuration for the higher values of Reynolds Number. The average Nusselt Number increased with- Reynolds Number, Prandlt Number. The heating efficiency increases with- Reynolds Number, Prandlt Number and Rib height

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