Computation of heat transfer in rotating cavities using a twoequation model of turbulence
Abstract
A lowReynolds number kepsilon turbulence model has been used to predict convective heat transfer in symmetrically heated rotating cavities with a superimposed radial outflow of cooling air. The predictions extend to rotational Reynolds numbers of 3.7 x 10 to the 6th and encompass cases where the disk temperatures may be increasing, constant or decreasing in the radial direction. The model demostrates good predictive accuracy for the heat transfer from the free disk, but systematic errors remain for the symmetrically heated rotating cavity, particularly for the upstream disk. It is found that predictive accuracy improves as the rotational Reynolds number is increased, apart from test cases where nonasymmetric flow oscillations are postulated to occur. The global accuracy of the computational procedure regarding calculation of the local Nusselt numbers is estimated as + or  10 percent, with the values tending generally to be on the low side.
 Publication:

ASME, 35th International Gas Turbine and Aeroengine Congress and Exposition
 Pub Date:
 June 1990
 Bibcode:
 1990gatu.confS....M
 Keywords:

 Computational Fluid Dynamics;
 Heat Transfer;
 KEpsilon Turbulence Model;
 Rotating Fluids;
 Cavities;
 Finite Difference Theory;
 Low Reynolds Number;
 Radial Flow;
 Rotating Cylinders;
 Fluid Mechanics and Heat Transfer