Conjugate heat transfer predictions in two-dimensional ribbed passages☆

The effect of thermal boundary conditions on numerical heat transfer predictions in rib-roughened passages is investigated. Results obtained using constant heat flux at the walls and conjugate heat transfer are compared to illustrate how the recirculation bubbles upstream and downstream of the rib have different effects on the local heat transfer. Comparison between numerical predictions, experimental measurements and data correlations show that the predicted heat transfer is very sensitive to the type of boundary conditions used in the numerical model. It is illustrated that some of the discrepancies observed between experimental and numerical data can be eliminated if conduction heat transfer in the rib is taken into account. 2002 Published by Elsevier Science Inc.

[1]  M. Chyu,et al.  COMBINED EFFECTS OF RIB ANGLE-OF-ATTACK AND PITCH-TO-HEIGHT RATIO ON MASS TRANSFER FROM A SURFACE WITH TRANSVERSE RIBS , 1989 .

[2]  Jenn-Jiang Hwang,et al.  Simulation and measurement of enhanced turbulent heat transfer in a channel with periodic ribs on one principal wall , 1993 .

[3]  Wolfgang Rodi,et al.  Experience with two-layer models combining the k-epsilon model with a one-equation model near the wall , 1991 .

[4]  Je-Chin Han,et al.  Heat transfer enhancement in channels with turbulence promoters , 1984 .

[5]  P. Durbin.  SEPARATED FLOW COMPUTATIONS WITH THE K-E-V2 MODEL , 1995 .

[6]  Tony Arts,et al.  The Effect of Periodic Ribs on the Local Aerodynamic and Heat Transfer Performance of a Straight Cooling Channel , 1996 .

[7]  M. Raisee,et al.  Recent progress in the computation of flow and heat transfer in internal cooling passages of turbine blades , 1999 .

[8]  Robert J. Simoneau,et al.  Progress towards understanding and predicting heat transfer in the turbine gas path , 1993 .

[9]  M. Stephens,et al.  Computation of flow and heat transfer in a rectangular channel with ribs , 1995 .

[10]  B. Launder,et al.  Application of the energy-dissipation model of turbulence to the calculation of flow near a spinning disc , 1974 .

[11]  Gianluca Iaccarino,et al.  Predictions of a turbulent separated flow using commercial CFD codes , 2001 .

[12]  Je-Chin Han,et al.  An investigation of heat transfer and friction for rib-roughened surfaces , 1978 .

[13]  T. S. Ravigururajan,et al.  Development and verification of general correlations for pressure drop and heat transfer in single-phase turbulent flow in enhanced tubes , 1996 .

[14]  Masud Behnia,et al.  Reynolds averaged simulation of flow and heat transfer in ribbed ducts , 2002 .