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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 56, 2009 - Issue 5
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Original Articles

Conjugate Heat and Mass Transfer from a Drying Rectangular Cylinder in Confined Air Flow

, , &
Pages 379-405 | Received 21 Jan 2009, Accepted 03 Jul 2009, Published online: 25 Sep 2009
 

Abstract

Heat and mass transfer from a porous body subject to convective drying is investigated numerically based on Luikov's equations. The air flow is assumed incompressible, two-dimensional, laminar, confined in a channel, and parallel to the rectangular-shaped solid. The finite-volume method is used and the computed temporal and spatial variations of moisture content, temperature, concentration, and flow parameters for two different flow rates are analyzed. Two flow configurations are studied: with and without a flow divider upstream of the cylinder in an attempt to eliminate the presence of separation zones and study their effect on drying. It was found that such effects may greatly affect the drying process, along with frontal area stagnation and the thickness of the body.

The authors would like to acknowledge the financial support by the European Social Fund of the European Community and the Greek General Secretariat for Research and Technology through the Operational Program “Competitiveness” (Measure 8.3, Human Resources in Research & Technology), grant no. 03 E▵303.

Notes

1It should be noted that in the present nondimensionalization Re is based on Hs /2, therefore, for comparisons with results from literature studies in rectangular cylinders (e.g., Okajima [Citation13]) normally using Re∗ = uiHs /ν, Re = Re∗/2 should be taken.

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