A NUMERICAL STUDY OF FORCED CONVECTION HEAT TRANSFER OVER A SERIES OF FLAT TUBES BETWEEN PARALLEL PLATES

This paper presents the numerical study of the two-dimensional forced convection heat transfer across three in-line flat tubes confined in a channel the flow under incompressible, steady-state conditions. This system is solved in the body fitted coordinates (BFC) using the finite volume method (FVM). The constant temperature is imposed on the surface of the tubes as the thermal boundary conditions. The range of the longitudinal pitch-to-diameter ratio SL/Ds is considered of 2.0-4.0 and Reynolds numbers varies within the range of 25-300, and Prandtl number is taken as 0.7. The temperature contours, local Nusselt number distributions at the tube surface and mean Nusselt number were analyzed. The strength of the heat transfer between the surface of the tubes and the air flow increases with increasing Reynolds number and increasing pitch-to-diameter the ratio.

[1]  David Sumner,et al.  Two circular cylinders in cross-flow: A review , 2010 .

[2]  J. V. C. Vargasa,et al.  OPTIMALLY STAGGERED FINNED CIRCULAR AND ELLIPTIC TUBES IN FORCED CONVECTION , 2004 .

[3]  Adrian Bejan,et al.  Forced convection in banks of inclined cylinders at low Reynolds numbers , 1994 .

[4]  Kuppan Thulukkanam.  Heat Exchanger Design Handbook , 2013 .

[5]  Martin Fiebig,et al.  CONJUGATE HEAT TRANSFER OF A FINNED OVAL TUBE PART A: FLOW PATTERNS , 1998 .

[6]  E. Schlunder.  Heat exchanger design handbook , 1983 .

[7]  T. A. Cowell,et al.  Heat transfer and pressure drop characteristics of flat tube and louvered plate fin surfaces , 1988 .

[8]  K. V. Sharma,et al.  Turbulent Film Condensation of Pure Vapors FlowingNormal to a Horizontal Condenser Tube - Constant HeatFlux at the Tube Wall , 2011 .

[9]  C. H. Marchi,et al.  Numerical solution of staggered circular tubes in two-dimensional laminar forced convection , 2007 .

[10]  D. Spalding,et al.  A NUMERICAL STUDY OF UNSTEADY FLUID FLOW IN IN-LINE AND STAGGERED TUBE BANKS , 1999 .

[11]  M. Ijaz,et al.  Numerical Study of Fluid Flow and Heat Transfer Over a Series of In-Line Noncircular Tubes Confined in a Parallel-Plate Channel , 2006 .

[12]  M. Khalil Bassiouny,et al.  Modeling of heat transfer for flow across tube banks , 2000 .

[13]  A. Zukauskas.  Heat Transfer from Tubes in Crossflow , 1972 .

[14]  CONJUGATE HEAT TRANSFER OF A FINNED OVAL TUBE PART B: HEAT TRANSFER BEHAVIORS , 1998 .

[15]  R. Rahmani,et al.  COMPUTATION OF A LAMINAR FLOW AND HEAT TRANSFER OF AIR FOR STAGGERED TUBE ARRAYS IN CROSS-FLOW , 2005 .

[16]  Y. Q. Wang,et al.  ANALYSIS OF LAMINAR FORCED CONVECTION OF AIR FOR CROSSFLOW IN BANKS OF STAGGERED TUBES , 2000 .

[17]  S. Jayavel,et al.  Numerical study of heat transfer and pressure drop for flow past inline and staggered tube bundles , 2009 .

[18]  Joe F. Thompson,et al.  Numerical grid generation: Foundations and applications , 1985 .

[19]  R. P. Chhabra,et al.  Forced convection heat transfer in tube banks in cross flow , 2002 .

[20]  C. Balaji,et al.  Unsteady fluid flow and heat transfer over a bank of flat tubes , 2008 .

[21]  K. N. Seetharamu,et al.  Convection Heat Transfer , 2005 .