A three-dimensional inverse problem in imaging the local heat transfer coefficients for plate finned-tube heat exchangers

2003 ◽  
Vol 46 (19) ◽  
pp. 3629-3638 ◽  
Author(s):  
Cheng-Hung Huang ◽  
I-Cha Yuan ◽  
Herchang Ay
Keyword(s):  
Heat Transfer ◽  
Inverse Problem ◽  
Heat Exchangers ◽  
Three Dimensional ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Finned Tube ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients

Numerical Analysis of Local Heat Transfer From a Flat Plate to a Pair of Circular Air Impingining Jets

2004 ◽  
Author(s):  
X. Terry Yan ◽  
Yavaraj Saravanan
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Flat Plate ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Impinging Jets ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients

Local heat transfer from a flat plate to a pair of circular air impinging jets is investigated numerically. A pair of impinging jets from fully-developed pipe flows are used for the numerical simulations. The Reynolds Averaged Navier-Stokes equations(RANS) and energy equation are solved for the three dimensional flow. Eddy-viscocity based turbulence models, RNG k-epsilon and V2F models, are used. Hybrid meshes are used for the three dimensional flows and mesh independent solutions are obtained. The flow Reynolds number, which is based on the jet diameter, is kept at 23,000. In the analysis, local heat transfer coefficients are obtained for the jet-to-plate distance, L/D, ranging from 2 to 10 and the jet-to-jet spacing, S/D, in the range of 1.75 to 7.0. Both local and average heat transfer coefficients are evaluated and compared with available experimental data under same flow conditions. The effect of using different turbulence models in the numerical analysis is evaluated and the selection of proper turbulence models under such a flow condition is suggested.

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