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Chemical Reaction and Thermal Diffusion Effects on Mass Transfer Flow through an inclined plate

Open Journal of Fluid Dynamics 2016年第1期6卷 62-74页

作者： Farjana Akter Md. Manjiul Islam Ariful Islam Md. Shakhaoath Khan Md. Saddam Hossain Mathematics Discipline Khulna University Khulna Bangladesh Discipline of Chemical Engineering University of Newcastle Callaghan Australia

A numerical investigation of boundary layer mass transfer flow through an inclined plate with the effect of chemical reaction and thermal diffusion is presented in this study. The governing partial differential equations (PDE) are transformed to a system of dimensionless non-similar coupled PDEs. The transformed, non-similar conservations equations (momentum balance equation, energy balance equation and concentration balance equation) are then solved using a numerical approach known as explicit finite difference method (EFDM). Basically EFDM introduced for the unsteadiness in the momentum, temperature, and concentration fluid fields is based on the time dependent fluid velocity, temperature and concentration of the boundary surface. During the course of discussion, it is found that the various parameters related to the problem influence the calculated resultant expressions. The computed numerical solution results for the velocity, temperature, and concentration distribution with the effect of various important dimensionless parameters (Grashof number, Modified Grashof number, Prandtl number, Schmidt number, Soret number, Dufour number, chemical reaction parameter and inclination parameter) entering into the problems are critically analyzed and discussed graphically. It can be seen that two physical phenomena chemical reaction and thermal diffusion can greatly effect on the boundary layer fluid flows through an inclined plate.

关键词： Chemical Reaction Mass Transfer inclined plate Soret Effects Dufour Effects

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Modeling natural convection heat transfer from perforated plates

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第5期13卷 353-360页

作者： Zan WU Wei LI Zhi-jian SUN Rong-hua HONG Department of Energy Engineering Zhejiang University Hangzhou 310027 China

Staggered pattern perforations are introduced to isolated isothermal plates,vertical parallel isothermal plates,and vertical rectangular isothermal fins under natural convection *** performance of perforations was evaluated theoretically based on existing correlations by considering effects of ratios of open area,inclined angles,and other geometric *** was found that staggered pattern perforations can increase the total heat transfer rate for isolated isothermal plates and vertical parallel plates,with low ratios of plate height to wall-to-wall spacing(H/s),by a factor of 1.07 to 1.21,while only by a factor of 1.03 to 1.07 for vertical rectangular isothermal fins,and the magnitude of enhancement is proportional to the ratio of open ***,staggered pattern perforations are detrimental to heat transfer enhancement of vertical parallel plates with large H/s ratios.

关键词： Staggered pattern perforation Natural convection inclined plate Parallel plate Rectangular fins

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