Assessment of a near-wall second-moment closure for rotating multiple-pass cooling channels

1999, American Institute of Aeronautics and Astronautics, Inc. All rights reserved. A multiblock numerical method has been employed together with chimera domain decomposition technique to calculate three-dimensional flow and heat transfer in rotating two-pass square channels with smooth walls. The method solves Reynolds-Averaged Navier- Stokes equations in conjunction with a near-wall secondorder Reynolds stress (second-moment) closure model and a two-layer k - isotropic eddy viscosity model. The second-moment solutions show that the Coriolii and centrifugal bouyancy forces produced strong nonisotropic turbulent stresses and heat fluxes that significantly affected the friction factors and heat transfer co efficients in the rotating twopass square channel, particularly in the 180 bend region. The near-wall secondmoment closure model provides au improved heat transfer prediction in comparison with the k - model.

Assessment of a near-wall second-moment closure for rotating multiple-pass cooling channels Conference Paper