Numerical analysis of laminar mixed convection in a channel
| Autor: | Da-Wei Hsu, 徐大為 |
|---|---|
| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 This study numerically investigates the laminar flow for mixed convection heat transfer problem between parallel plates. Constant plate wall temperature and uniform flow entry are assumed. Parameters of Reynolds number, inclined angle, and are varied to obtain the velocity and temperature distributions in the channel. Introducing the dimensionless quantities, the governing equations as well as boundary conditions are first non-dimensionalized. Then, all the equations are written in finite difference forms and simultaneously solved. Employing the trapezoidal integral method, Nusselt numbers in the channel are obtained with the calculated velocities and temperatures. The results show that backflow in the center of the flow is observed in the channel at a certain distance from the inlet for =10. This phenomenon also takes place for =1 but it occurs with the position shifting downstream. No backflow is found for =0.1. The effects of inclination on is insignificant for =0.1. As the inclined angle increases, Nusselt number decreases for =10. In addition, the in the channel increases with. Finally, it is expected that the results of this study may facilitate the prospective design of relevant heat exchangers. Keywords: Mixed convection, Channel flow, Finite difference method |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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