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Journal of Enhanced Heat Transfer
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ISSN Druckformat: 1065-5131
ISSN Online: 1563-5074

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v13.i1.40
pages 53-64

Transient Fluid Flow and Heat Transfer in a Porous Structure with Partial Heating and Evaporation on the Upper Surface

Piyasak Damronglerd
Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211, USA
Yuwen Zhang
University of Missouri, Columbia, MO 65201, USA

ABSTRAKT

A numerical study of transient fluid flow and heat transfer in a porous medium with partial heating and evaporation on the upper surface is performed. The dependence of the saturation temperature on the pressure was accounted for by using the Clausius-Clapeyron equation. The model was tested first by reproducing the analytical results given in a previous research. A new kind of boundary conditions was applied in order to reduce restrictions used in an analytical solution and to study changes in velocity and temperature distributions before reaching the steady-state evaporation. The results showed that as time passes the magnitude of velocity increases until the process reached the steady state. The maximum velocity occurred near the end of the heated plate. Also, the temperature near the heated surface was higher than the saturation temperature representing superheated liquid.


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