This paper presents a comprehensive computational work on the hydrodynamic, thermal, and mass transfer characteristics of a circular cylinder, subjected to confined flow at the cylinder Reynolds number of . As the two-dimensional, steady and incompressible momentum and energy equations are solved using ANSYS-CFX (version 11.0), the moisture distributions are computed by a new alternating direction implicit method based software. The significant results, highlighting the influence of blockage on the flow and heat transfer mechanism and clarifying the combined roles of and moisture diffusivity on the mass transfer behavior, are obtained for practical applications. It is shown that the blockage augments the friction coefficients and Nusselt numbers (Nu) on the complete cylinder surface, where the average Nu are evaluated as , 4.05, 4.97, and 6.51 for , 0.333, 0.571, and 0.800. Moreover, the blockage shifts separation and maximum locations downstream to the positions of , 50.20, 41.98, and 37.30 deg and , 53.4, 74.9, and 85.4 deg. The highest blockage of encourages the downstream backward velocity values, which as a consequence disturbs the boundary layer and weakens the fluid-solid contact. The center and average moisture contents differ significantly at the beginning of drying process, but in the last 5% of the drying period they vary only by 1.6%. Additionally, higher blockage augments mass transfer coefficients on the overall cylinder surface; however, the growing rate of back face mass transfer coefficients is dominant to that of the front face values , with the interpreting ratios of and 0.57 and and 1.43 for and 0.800.
Laminar Boundary Layer Development Around a Circular Cylinder: Fluid Flow and Heat-Mass Transfer Characteristics
Alper Ozalp, A., and Dincer, I. (September 20, 2010). "Laminar Boundary Layer Development Around a Circular Cylinder: Fluid Flow and Heat-Mass Transfer Characteristics." ASME. J. Heat Transfer. December 2010; 132(12): 121703. https://doi.org/10.1115/1.4002288
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