Near-Wall Second-Moment Closure for Rotating Multiple-Pass Cooling Channels
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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 second-order Reynolds stress (second-moment) closure model and a two-layer k-ε isotropic eddy viscosity model. The second-moment solutions show that the Coriolis and centrifugal buoyancy forces produced strong nonisotropic turbulent stresses and heat fluxes that significantly affected the friction factors and heat-transfer coefficients in the rotating two-pass square channel, particularly in the 180-deg bend region. The near-wall second-moment closure model provides an improved heat-transfer prediction in comparison with the k-ε model.
author list (cited authors)
Chen, H., Jang, Y., & Han, J.
complete list of authors
Chen, Hamn-Ching||Jang, Yong-Jun||Han, Je-Chin