EFFECT OF INCLINED VORTEX GENERATORS ON HEAT TRANSFER ENHANCEMENT IN A THREE-DIMENSIONAL CHANNEL

Three-dimensional unsteady flow and heat transfer in a channel with inclined block shape vortex generators mounted on one side of a channel flow are investigated for different Reynolds numbers, Re H= 400 - 1500 , and Pr = 0.71. This study was informed to gain an understanding of the flow phenomena and calculate the heat transfer and pressure drop for different Reynolds numbers. The effect of computational domain, angle of incidence, size of the vortex generator, and the discretization schemes on the results are also investigated. Simulations use an incompressible finite volume code, based on a fractional step technique with a multigrid pressure Poisson solver and a nonstaggered grid arrangement.

[1]  Morgan Heikal,et al.  Two- and three-dimensional numerical models of flow and heat transfer over louvred fin arrays in compact heat exchangers , 1998 .

[2]  Martin Fiebig,et al.  Wing-type vortex generators for fin-and-tube heat exchangers , 1993 .

[3]  L. Davidson,et al.  Large Eddy Simulation of Flow Past a Square Cylinder: Comparison of Different Subgrid Scale Models , 2000 .

[4]  Gautam Biswas,et al.  Heat transfer enhancement in fin-tube heat exchangers by winglet type vortex generators , 1994 .

[5]  K. Hanjalić,et al.  LES of Recirculating Flow Without Any Homogeneous Direction : A Dynamic One-Equation Subgrid Model , .

[6]  T. Newell,et al.  An experimental study of flow and heat transfer in sinusoidal wavy passages , 1999 .

[7]  Danesh K. Tafti,et al.  Time-dependent calculation procedure for fully developed and developing flow and heat transfer in louvered fin geometries , 1999 .

[8]  P. Moin,et al.  Numerical studies of flow over a circular cylinder at ReD=3900 , 2000 .

[9]  Chi-Chuan Wang,et al.  Heat transfer and friction correlation for compact louvered fin-and-tube heat exchangers , 1999 .

[10]  C. Williamson.  Vortex Dynamics in the Cylinder Wake , 1996 .

[11]  Koichi Nishino,et al.  Numerical and experimental determination of flow structure and heat transfer effects of longitudinal vortices in a channel flow , 1996 .

[12]  Peter Emvin.  The Full Multigrid Method Applied to Turbulent Flow in Ventilated Enclosures Using Structured and Unstructured Grids , 1997 .

[13]  M. Breuer.  LARGE EDDY SIMULATION OF THE SUBCRITICAL FLOW PAST A CIRCULAR CYLINDER: NUMERICAL AND MODELING ASPECTS , 1998 .

[14]  Gautam Biswas,et al.  Heat transfer and flow structure in laminar and turbulent flows in a rectangular channel with longitudinal vortices , 1995 .