Analysis of vortex heat transfer in a transverse flow past a trench on a plane using multiblock computation technologies and different semi-empirical models of turbulence

2004 ◽  
Vol 77 (6) ◽  
pp. 1236-1246 ◽  
Author(s):  
S. A. Isaev ◽  
P. A. Baranov ◽  
N. A. Kudryavtsev ◽  
A. E. Usachov
Keyword(s):  
Heat Transfer ◽  
Transverse Flow ◽  
Empirical Models ◽  
Flow Past ◽  
Semi Empirical

Heat transfer and drag for transverse flow past bundles of finned tubes at low reynolds numbers

1978 ◽  
Vol 14 (10) ◽  
pp. 905-907
Author(s):  
A. S. Lyshevskii ◽  
V. G. Sokolov ◽  
V. M. Sychev ◽  
L. Ya. Shkret
Keyword(s):  
Heat Transfer ◽  
Reynolds Numbers ◽  
Transverse Flow ◽  
Low Reynolds Numbers ◽  
Finned Tubes ◽  
Flow Past ◽  
Low Reynolds

Heat Transfer and Pressure Drop During Condensation of R-134a Inside Parallel Microchannels

2011 ◽  
Author(s):  
Gil Goss Ju´nior ◽  
Stefano Frasson Macarini ◽  
Ju´lio Ce´sar Passos
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Empirical Models ◽  
Test Conditions ◽  
R 134A ◽  
Parallel Microchannels ◽  
Semi Empirical ◽  
Convective Condensation

In this study the pressure drop and local heat transfer coefficient were investigated experimentally during the convective condensation of R-134a inside eight round (D = 0.8 mm) horizontal and parallel microchannels. The test conditions included mass velocity and pressure ranges of 57 to 125 kg.m−2s−1 and 6.8 to 11.2 bar, respectively. The experimental results are compared with correlations and semi-empirical models described in the literature.

Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

2005 ◽  
Vol 43 (5) ◽  
pp. 746-759 ◽  
Author(s):  
S. A. Isaev ◽  
A. I. Leontiev ◽  
N. A. Kudryavtsev ◽  
T. A. Baranova ◽  
D. A. Lysenko
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Circular Cylinder ◽  
Transverse Flow ◽  
Unsteady State ◽  
State Heat ◽  
Flow Past

Some comments on heat-transfer laws for fine wires

1972 ◽  
Vol 51 (3) ◽  
pp. 487-495 ◽  
Author(s):  
L. J. S. Bradbury ◽  
I. P. Castro
Keyword(s):  
Heat Transfer ◽  
Time Constants ◽  
Transfer Rates ◽  
Flow Past ◽  
Semi Empirical ◽  
Relationship Of ◽  
The Relationship

The semi-empirical heat-transfer laws of Collis & Williams (1959) and Davies & Fisher (1964) give values of the heat-transfer rates for the flow past fine wires which are generally very different from one another. This paper describes some measurements of heat-transfer and convective time constants which show that the relationship of Collis & Williams is the more representative expression.

Polishing and Honing Processes: An Investigation of the Thermal Properties of Mixtures of Polyborosiloxane and Silicon Carbide Abrasive

1996 ◽  
Vol 210 (3) ◽  
pp. 255-265 ◽  
Author(s):  
A J Fletcher ◽  
A Fioravanti
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Thermal Properties ◽  
Empirical Models ◽  
Surface Heat ◽  
Transfer Processes ◽  
Surface Heat Transfer Coefficient ◽  
Semi Empirical

The passage of an ultrasonic wave through a mixture of polyborosiloxane and silicon carbide abrasive, when used in a honing process, causes heating due to the attenuation of the said wave. This is critical to the honing process since the temperature in the components being treated must be limited to about 70° C. A numerical model of the heat generation and transfer processes in the polishing medium is being formulated, which requires knowledge of the thermophysical properties of the mixture. This investigation concentrates on the experimental determination of thermal conductivity, specific heat capacity and surface heat transfer coefficient for various mixtures of polyborosiloxane and silicon carbide abrasive. Theoretical, semi-empirical and empirical models are derived for the variation of these thermal properties as functions of both material composition and temperature.

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