Double diffusive unsteady free convection on two-dimensional and axisymmetric bodies in a porous medium

1989 ◽  
Vol 13 (4) ◽  
pp. 379-391 ◽  
Author(s):  
M. Kumari ◽  
G. Nath
Keyword(s):  
Porous Medium ◽  
Free Convection ◽  
Two Dimensional ◽  
Axisymmetric Bodies ◽  
Double Diffusive

DOUBLE DIFFUSIVE FREE CONVECTION ALONG A VERTICAL SURFACE IN A DOUBLY STRATIFIED POROUS MEDIUM WITH SORET AND DUFOUR EFFECTS UNDER MHD FORCES

2017 ◽  
Vol 20 (10) ◽  
pp. 865-879
Author(s):  
S.V.S.S.N.V.G. Krishna Murthy ◽  
Frédéric Magoulès ◽  
B. V. Rathish Kumar ◽  
Vinay Kumar
Keyword(s):  
Porous Medium ◽  
Free Convection ◽  
Vertical Surface ◽  
Soret And Dufour Effects ◽  
Double Diffusive

Two-Phase Boundary Layer Treatment for Subcooled Free-Convection Film Boiling Around a Body of Arbitrary Shape in a Porous Medium

1987 ◽  
Vol 109 (4) ◽  
pp. 997-1002 ◽  
Author(s):  
A. Nakayama ◽  
H. Koyama ◽  
F. Kuwahara
Keyword(s):  
Boundary Layer ◽  
Porous Medium ◽  
Free Convection ◽  
Phase Boundary ◽  
Flat Plate ◽  
Arbitrary Shape ◽  
Film Boiling ◽  
Two Phase ◽  
The One ◽  
Axisymmetric Bodies

The two-phase boundary layer theory was adopted to investigate subcooled free-convection film boiling over a body of arbitrary shape embedded in a porous medium. A general similarity variable which accounts for the geometric effect on the boundary layer length scale was introduced to treat the problem once for all possible two-dimensional and axisymmetric bodies. By virtue of this generalized transformation, the set of governing equations and boundary conditions for an arbitrary shape reduces into the one for a vertical flat plate already solved by Cheng and Verma. Thus, the numerical values furnished for a flat plate may readily be tranlsated for any particular body configuration of concern. Furthermore, an explicit Nusselt number expression in terms of the parameters associated with the degrees of subcooling and superheating has been established upon considering physical limiting conditions.

Non-Darcy Free Convection of Power-Law Fluids Over a Two-Dimensional Body Embedded in a Porous Medium

2010 ◽  
Vol 86 (3) ◽  
pp. 965-972 ◽  
Author(s):  
M. F. El-Amin ◽  
S. Sun ◽  
M. A. El-Ameen ◽  
Y. A. Jaha ◽  
Rama Subba Reddy Gorla
Keyword(s):  
Porous Medium ◽  
Free Convection ◽  
Power Law ◽  
Two Dimensional ◽  
Power Law Fluids

Laminar Free Convection Over Two-Dimensional and Axisymmetric Bodies of Arbitrary Contour

1974 ◽  
Vol 96 (4) ◽  
pp. 435-442 ◽  
Author(s):  
F. N. Lin ◽  
B. T. Chao
Keyword(s):  
Free Convection ◽  
Experimental Information ◽  
The Body ◽  
Two Dimensional ◽  
Universal Functions ◽  
Body Contour ◽  
Convection Boundary ◽  
Smooth Objects ◽  
Elliptical Cylinders ◽  
Axisymmetric Bodies

A rapid computation procedure is described for the prediction of heat transfer in laminar free convection boundary layers, either two-dimensional or axisymmetrical, over isothermal smooth objects with fairly arbitrary shape. The analysis employs suitable coordinate transformation which makes it possible to express the solutions of the governing conservation equations in terms of a sequence of universal functions that depend on the fluid Prandtl number and a configuration function. The latter is completely determined by the body contour and its orientation relative to the body force that generates the motion. Several of the leading universal functions have been evaluated and tabulated. The theory was applied to a number of body configurations and the results compared well with published analytical and/or experimental information. Some new results are also obtained for the local Nusselt number over horizontal elliptical cylinders and ellipsoids or revolution.

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