ISSN:
1573-1987
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A numerical solution using a combination of boundary vorticity method and line iterative relaxation method is presented for the hydrodynamically and thermally fully developed combined free and forced laminar convection with upward flow in inclined tubes subjected to the thermal boundary conditions of axially uniform wall heat flux and peripherally uniform wall temperature at any axial position. The numerical solution converges up to a reasonably high value of the characteristic parameter where an asymptotic behaviour for flow and heat transfer resultsfalready appears, and further results can be obtained by a linear extrapolation. The tube inclination angle or body-force orientation effects on flow and heat transfer characteristics are clarified for upward laminar flow configuration, and show that in high Rayleigh number regime the tube orientation effect has considerable influence on the results in the neighborhood of horizontal direction. Typical graphical results for flow and heat transfer are presented, mainly to illustrate the effects of Rayleigh number and tube inclination. The numerical results show that the perturbation method is invalid for the present problem.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00382474
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