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Research Papers: Evaporation, Boiling, and Condensation

Turbulent Mixed Convection Inside a Vertical Tube With Wetted Wall

[+] Author and Article Information
X. Chesneau1

S. Abide, B. Zeghmati

Laboratoire de Mathématiques et Physique- Groupe de Mécanique Energétique (L.AM.P.S.- G.M.E.),  Université de Perpignan, Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan, France

1

Corresponding author.

J. Heat Transfer 133(10), 101503 (Aug 11, 2011) (7 pages) doi:10.1115/1.4003574 History: Received September 20, 2010; Revised January 21, 2011; Published August 11, 2011; Online August 11, 2011

The authors present a numerical investigation of turbulent mixed convection inside a wetted—wall tube. The mixture air and water vapor flows downwards the vertical tube. Turbulent momentum, heat and mass transfer equations combined with a low Reynolds number model are discretized by using the finite volume method. The algebraic system equations deduced from this discretization are solved with the Thomas and Gauss algorithms. Results show that the evaporative cooling of the wetted wall and the air flow through the tube can be produced by low heat flux applied to the tube wall.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 7

Temperature profile, q=75Wm-2

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Figure 8

Local sensible Nusselt evolution along the tube, q=75Wm-2

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Figure 9

Wall and bulk temperature evolution along the tube

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Figure 10

Local Sherwood number evolution along the tube

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Figure 11

Local sensible Nusselt number evolution along the tube—effect of the inlet air relative humidity humidity

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Figure 12

Local Sherwood number evolution along the tube—effect of the Reynolds number

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Figure 13

Local Nusselt number evolution along the tube—effect of the Reynolds number

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Figure 14

Cumulative evaporated rate evolution along the tube—effect of inlet air temperature

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Figure 15

Local Nusselt number evolution along the tube—influence of the inlet temperature

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Figure 1

Schematic diagram

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Figure 3

Temperature profile, q=25Wm-2

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Figure 4

Local sensible Nusselt number evolution along the tube, q=25Wm-2

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Figure 5

Temperature profile, q=50Wm-2

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Figure 6

Local sensible Nusselt evolution along the tube, q=50Wm-2

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