Miscible displacement with combined free and forced convection: Laminar flow in a vertical tube

AIChE Journal ◽  
1973 ◽  
Vol 19 (1) ◽  
pp. 151-158 ◽  
Author(s):  
Martin Posner ◽  
William N. Gill
Keyword(s):  
Laminar Flow ◽  
Forced Convection ◽  
Vertical Tube ◽  
Miscible Displacement ◽  
Free And Forced Convection

On the Conjugate Problem of Laminar Combined Free and Forced Convection through Vertical Non-Circular Ducts

1972 ◽  
Vol 94 (1) ◽  
pp. 52-56 ◽  
Author(s):  
M. Iqbal ◽  
B. D. Aggarwala ◽  
A. K. Khatry
Keyword(s):  
Heat Conduction ◽  
Laminar Flow ◽  
Forced Convection ◽  
Small Variation ◽  
Conjugate Problem ◽  
Momentum Equation ◽  
Variational Technique ◽  
Fluid Properties ◽  
Free And Forced Convection ◽  
Axial Heat

The present analysis deals with the conjugate problem of combined free and forced convection through vertical non-circular ducts. The equations coupling heat conduction in the walls with the convection inside the fluid are solved to establish the influence of peripheral wall conduction, using variational technique. Fully developed laminar flow with uniform axial heat input and constant fluid properties, except for the small variation of density in the buoyancy term of the momentum equation, is assumed. The problem has been solved in a generalized way and the results have been presented for rectangular ducts. It is found that large values of the free convection effects and/or of the conduction parameter tend to minimize the asymmetries in circumferential wall temperature.

Combined Free and Forced Convection Heat Transfer for Laminar Flow in Horizontal Tubes

1965 ◽  
Vol 7 (4) ◽  
pp. 440-448 ◽  
Author(s):  
A. R. Brown ◽  
M. A. Thomas
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Laminar Flow ◽  
Forced Convection ◽  
Convection Heat Transfer ◽  
Convection Heat ◽  
Forced Convection Heat Transfer ◽  
Horizontal Tubes ◽  
New Correlation ◽  
Free And Forced Convection

This paper describes an investigation into combined free and forced convection heat transfer for laminar water flow in horizontal tubes. The experimental data obtained do not agree with existing correlations, which relate mainly to oils. A new correlation has been derived which fits the water data to within ±8 per cent.

Combined Free and Forced-Convection Heat-Generating Laminar Flow Inside Vertical Pipes With Circular Sector Cross Sections

1960 ◽  
Vol 82 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Pau-Chang Lu
Keyword(s):  
Laminar Flow ◽  
Forced Convection ◽  
Cross Sections ◽  
Body Force ◽  
Convection Heat ◽  
Circular Sector ◽  
Numerical Example ◽  
Sine Transform ◽  
Fourier Sine Transform ◽  
Free And Forced Convection

Combined free and forced-convection, heat-generating laminar flow inside cylindrical pipes with elements parallel to the direction of the generating body force is solved by applying the finite Fourier sine transform and finite Hankel transforms when the cross sections of the pipes are circular sectors. A numerical example is provided to show the effects of various parameters.

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