Numerical investigations of flow and heat transfer characteristics between turbulent double jet impingement and a moving plate

The analysis of fluid flow and heat transfer characteristics of double turbulent jet flow impinging on a stationary and moving plate has been studied numerically. Unsteady state two dimensional incompressible turbulent forced convection flow is considered for present analysis. Turbulence is modelled by Reynolds Averaged Navier-Stokes (RANS) equation with k − ɛ model and enhanced wall treatment at the wall. The governing equations are solved using a finite volume based commercial solver. Results for effect of single jet and double jet, jet Reynolds number, plate velocity, location and center spacing between two jets on flow and heat transfer characteristics are reported. Results show that enhancement of heat transfer is 32.70% for double jet compared to single jet impingement on a stationary plate. Significant enhancement of heat transfer is observed with increase in second jet Reynolds number and plate velocity. Results show that the size and shape of the recirculation zones between jets are greatly altered with respect to spacing between jets to plate and centre distance between jets. Results show that the enhancement of heat transfer is 37.3% for moving plate velocity with decreasing the spacing between jets and plate from 6 to 4. Results show that the local peak Nusselt number is influenced by the plate velocity. The present results are validated with experimental and numerical results available in the literature