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ISSN Печать: 1065-5131
ISSN Онлайн: 1563-5074
Indexed in
Boundary Element Analysis of Mechanisms to Enhance Heat Transport by Solitary Waves on Falling Thin Liquid Films
Краткое описание
A boundary element method for analysing heat transport phenomena in solitary wave on falling thin liquid films at high Reynolds numbers has been developed. The divergence theorem is applied to the non-linear convective volume integral of the boundary element formulation with the pressure penalty function. Consequently, velocity and temperature gradients are eliminated and the complete formulation is written in terms of velocity and temperature. This avoids the difficulty of convective discretizations, and provides considerable reduction in storage and computational requirements while improving accuracy. The shape of solitary wave has been calculated employing normal stress balance condition and shooting iterative method. The streamline maps and the temperature distributions in solitary wave and wavy film flow have been obtained; the variations of Nusselt numbers along the wall-liquid interface are also given. There are large cross-flow velocities and S-type temperature distribution in the recirculating region of solitary wave; this special flow and thermal process can be a mechanism to enhance heat transport.
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