Thermal Results for Forced Heat Convection Through Elliptical Ducts

1962 ◽  
Vol 29 (1) ◽  
pp. 165-170 ◽  
Author(s):  
N. T. Dunwoody
Keyword(s):  
Heat Transfer ◽  
Viscous Fluid ◽  
Cross Section ◽  
Constant Temperature ◽  
Fluid Flows ◽  
Numerical Results ◽  
Heat Convection ◽  
Elliptic Cross Section ◽  
Cross Sectional ◽  
Elliptic Cross

The purpose of the present investigation is to determine numerical results in respect of the heat transfer to the wall of a duct which has an elliptic cross section and through which a hot viscous fluid flows with a steady established laminar motion. The wall of the channel is at a constant temperature which is less than that of the entering fluid. Results for several cross-sectional eccentricities are presented and correlated.

On the Convective Heat Transfer in a Tube of Elliptic Cross Section Maintained Under Constant Wall Temperature

1986 ◽  
Vol 108 (1) ◽  
pp. 33-39 ◽  
Author(s):  
M. A. Ebadian ◽  
H. C. Topakoglu ◽  
O. A. Arnas
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Temperature Distribution ◽  
Convective Heat Transfer ◽  
Cross Section ◽  
Convective Heat ◽  
Wall Temperature ◽  
Elliptic Cross Section ◽  
Constant Wall Temperature ◽  
Elliptic Cross

The convective heat transfer problem along the portion of a tube of elliptic cross section maintained under a constant wall temperature where hydrodynamically and thermally fully developed flow conditions prevail is solved in this paper. The successive approximation method is used for the solution utilizing elliptic coordinates. Analytical expressions for temperature distribution and Nusselt number corresponding to the first cycle of approximation are obtained in terms of the ellipticity of the cross section. In the case of a circular section, the first cycle approximation of the Nusselt number is obtained as 3.7288 compared to the exact value of 3.6568. Representative temperature distribution curves are plotted and compared to those corresponding with constant wall heat flux conditions.

scholarly journals On a pulsatile flow of a two-phase viscous fluid in a tube of elliptic cross-section

1990 ◽  
Vol 13 (4) ◽  
pp. 669-676 ◽  
Author(s):  
A. K. Ghosh ◽  
A. R. Khan ◽  
L. Debnath
Keyword(s):  
Viscous Fluid ◽  
Cross Section ◽  
Fluid Velocity ◽  
Small Time ◽  
Spherical Particles ◽  
Elliptic Cross Section ◽  
Two Phase ◽  
Elliptic Cross ◽  
Periodic Pressure ◽  
Small Times

A study is made of an unsteady flow of an incompressible viscous fluid with embedded small inert spherical particles contained in a tube of elliptic cross-section due to a periodic pressure gradient acting along the length of the tube. The solutions for the fluid velocity and the particle velocity are obtained for large and small times. It is shown that the effect of particles on the flow is significant in the small-time solution while the large-tlme solution shows no effect of the particles on the flow.

The Acceleration of Thin Cylindrical Bodies in a Viscous Fluid

1978 ◽  
Vol 45 (1) ◽  
pp. 1-6 ◽  
Author(s):  
H. J. Lugt ◽  
H. J. Haussling
Keyword(s):  
Viscous Fluid ◽  
Incompressible Fluid ◽  
Cross Section ◽  
Viscous Incompressible Fluid ◽  
Cylindrical Body ◽  
Elliptic Cross Section ◽  
Trailing Edges ◽  
Elliptic Cross

The start from rest of a thin cylindrical body with elliptic cross section in a viscous incompressible fluid is studied numerically for various acceleration models. Force and moment coefficients are computed. The role of the starting vortices behind the leading and trailing edges in the generation of lift is investigated.

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