Numerical study of wall heat transfer in the recirculating flow region of a confined jet
Abstract
Wall heat transfer in the recirculating flow region of a confined jet is studied numerically within the framework of a kepsilon twoequation model of turbulence (where k is the turbulence kinetic energy and epsilon is its viscous dissipation rate). The numerical analysis is carried out using a finite difference scheme and staggered grid points. Fairly good agreement is obtained between experimental data and the numerical results when modified wall functions for enthalphy are used to account for the nonequilibrium structure of turbulence penetrating into the wall region from the jet shear layer. It is concluded that until a comprehensive method for nonequilibrium turbulence is well established, the present model can be tentatively used for predicting wall heat transfer from flows with a partially reversed flow region.
 Publication:

JSME Transactions
 Pub Date:
 March 1982
 Bibcode:
 1982JSMET..48..122K
 Keywords:

 Computational Fluid Dynamics;
 Heat Transfer;
 Jet Flow;
 Recirculative Fluid Flow;
 Wall Temperature;
 Boundary Value Problems;
 Coaxial Flow;
 Energy Dissipation;
 Enthalpy;
 Finite Difference Theory;
 KEpsilon Turbulence Model;
 Kinetic Energy;
 Nusselt Number;
 Pipe Flow;
 Reversed Flow;
 Turbulent Flow;
 Viscous Flow;
 Fluid Mechanics and Heat Transfer