by K.J. Hsieh and F.S. Lien
Department of Mechanical Engineering, University of Waterloo
sponsored by MMO/Nortel under MMO Project #DE708
Stage 1: Modeling Turbulent Forced Convective Heat Transfer in a Channel with Periodic Ribs
Stage 2: Modeling Turbulent Natural Convective Heat Transfer in a Tall Cavity
Stage 3: Modeling Turbulent Natural Convective Heat Transfer in a Square Cavity at Low Turbulence Level
The CFD code STREAM [1] employs a general nonorthogonal fully collocated finitevolume strategy, incorporates the monotonic highresolution approximation “UMIST” [2] for meanflow as well as turbulence convection, uses the “SIMPLE” pressurecorrection algorithm to satisfy mass conservation, and incorporates a range of turbulence models.



Rib pitch to rib height ratio (Pi/H)



Channel height to rib height ratio (D/H)



Reynolds number




to investigate the effect of 
Model LL +
Yap


Model LL


Model LL + Yap + NLSS


HRN ke
model + wall functions


Model LCL + Yap

Mean velocity at four channel locations. (o) Experimental data; (—) model LL with Yap; (– –) model LL without Yap.
Mean velocity at four channel locations. (o) Experimental data; (—) model LL with Yap; (– –) model LL with Yap and NLSS.
Mean velocity at four channel locations. (o) Experimental data; (—) model LL with Yap; (– –) HRN ke model with wall functions; (– –) model LCL with Yap.
TurbulenceIntensity Profiles:
Turbulence intensity at four channel locations. (o) Experimental data;(—) model LL with Yap; (– –) model LL without Yap.
Turbulence intensity at four channel locations. (o) Experimental data;(—) model LL with Yap; (– –) model LL with Yap and NLSS.
Turbulence intensity at four channel locations. (o) Experimental data;(—) model LL with Yap; (– –) HRN ke model with wall functions; (– –) model LCL with Yap.
The abscissa in the Nusselt number distributions figures, denoted by “s”, is defined along the rib faces and ribbed channel wall surface, where s=0 corresponds to the leftupper corner of the rib. The following figure illustrates the scoordinate system along the surfaces.
(a)