Turbulent flow and heat transfer enhancement of mixed convection over heated blocks in a channel

Purpose – To investigate the heat transfer enhancement performed by installing a rectangular plate turbulator for internal flow modification induced by vortex shedding.Design/methodology/approach – The large eddy simulation (LES) and SIMPLE‐C method coupled with preconditioned conjugate gradient methods have been applied to the turbulent flow field and heat transfer enhancement of mixed convection in a block‐heated channel.Findings – Provides information about heat transfer performance indicating that heat transfer performance can be affected by various width‐to‐height ratio of turbulator and Grasehof numbers with a constant Reynolds number. The results show that the installation of turbulator in cross‐flow above an upstream block can effectively enhance the heat transfer performance by suitable width‐to‐height ratio of turbulator and Grasehof numbers.Research limitations/implications – It is limited to two‐dimensional mean flow for the turbulent vortex‐shedding flow past a long square cylinder.Practical ...

[1]  Sumanta Acharya,et al.  Laminar mixed convection in a partially blocked, vertical channel , 1986 .

[2]  A. Gosman,et al.  A comparative study of subgrid scale models in homogeneous isotropic turbulence , 1997 .

[3]  E. Sparrow,et al.  Enhanced and local heat transfer, pressure drop, and flow visualization for arrays of block-like electronic components , 1983 .

[4]  M. Collins,et al.  LARGE-EDDY SIMULATION OF TURBULENT FLOW AND HEAT TRANSFER IN PLANE AND RIB-ROUGHENED CHANNELS , 1992 .

[5]  A. Mosyak,et al.  Nonuniform Temperature Distribution in Electronic Devices Cooled by Flow in Parallel Microchannels , 2000, Packaging of Electronic and Photonic Devices.

[6]  J. Whitelaw,et al.  Convective heat and mass transfer , 1966 .

[7]  A. Okajima.  Strouhal numbers of rectangular cylinders , 1982, Journal of Fluid Mechanics.

[8]  A. W. Vreman,et al.  A finite volume approach to large eddy simulation of compressible, homogeneous, isotropic, decaying turbulence , 1992 .

[9]  S. Murakami,et al.  Numerical study on flow past 2D square cylinder by Large Eddy Simulation: Comparison between 2D and 3D computations , 1993 .

[10]  Akira Yoshizawa,et al.  A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows , 1985 .

[11]  J. Lockett.  Heat Transfer from Roughened Surfaces using Laser Interferometry , 1987 .

[12]  J. Smagorinsky,et al.  GENERAL CIRCULATION EXPERIMENTS WITH THE PRIMITIVE EQUATIONS , 1963 .

[13]  Heat transfer augmentation of mixed convection through vortex shedding from an inclined plate in a vertical channel containing heated blocks , 1998 .

[14]  D. Kershaw.  The incomplete Cholesky—conjugate gradient method for the iterative solution of systems of linear equations , 1978 .

[15]  J. P. V. Doormaal,et al.  ENHANCEMENTS OF THE SIMPLE METHOD FOR PREDICTING INCOMPRESSIBLE FLUID FLOWS , 1984 .

[16]  C. Jayatilleke,et al.  The influence of Prandtl number and surface roughness on the resistance of the laminar sub-layer to momentum and heat transfer , 1966 .

[17]  Henk A. van der Vorst,et al.  Bi-CGSTAB: A Fast and Smoothly Converging Variant of Bi-CG for the Solution of Nonsymmetric Linear Systems , 1992, SIAM J. Sci. Comput..

[18]  Michel Visonneau,et al.  A new fully coupled solution of the Navier‐Stokes equations , 1994 .

[19]  U. Piomelli.  High Reynolds number calculations using the dynamic subgrid‐scale stress model , 1993 .

[20]  B. Mikic,et al.  Parametric optimization of multichanneled heat sinks for VLSI chip cooling , 2001 .

[21]  The Effect of Placing Vortex Generators Above Ribs in Ribbed Ducts on the Flow, Flow Temperature, and Heat Transfer Behavior , 1996 .

[22]  Yeng-Yung Tsui,et al.  A STUDY OF UPSTREAM-WEIGHTED HIGH-ORDER DIFFERENCING FOR APPROXIMATION TO FLOW CONVECTION , 1991 .

[23]  H. Sung,et al.  MIXED CONVECTION FROM MULTIPLE-LAYERED BOARDS WITH CROSS-STREAMWISE PERIODIC BOUNDARY-CONDITIONS , 1992 .