Developing fluid flow and heat transfer in a channel partially filled with porous medium
- Authors: Jen, Tien-Chien , Yan, T. Z.
- Date: 2005
- Subjects: Heat transfer , Fluid flow , Porous mediums
- Type: Article
- Identifier: uj:5264 , http://hdl.handle.net/10210/14933
- Description: A three-dimensional computational model is developed to analyze fluid flow in a channel partially filled with porous medium. In order to understand the developing fluid flow and heat transfer mechanisms inside the channel partially filled with porous medium, the conventional Navier–Stokes equations for gas channel, and volume-averaged Navier–Stokes equations for porous medium layer are adopted individually in this study. Conservation of mass, momentum and energy equations are solved numerically in a coupled gas and porous media domain along a channel using the vorticity–velocity method with power law scheme. Detailed development of axial velocity, secondary flow and temperature field at various axial positions in the entrance region are presented. The friction factor and Nusselt number are presented as a function of axial position, and the effects of the size of porous media inside the channel partially filled with porous medium are also analyzed in the present study.
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Numerical simulation of fluid flow and heat transfer in a curved square duct by using the Lattice Boltzmann method
- Authors: Liao, Quan , Jen, T.-C.
- Date: 2008
- Subjects: Fluid flow , Heat transfer
- Type: Article
- Identifier: uj:5274 , ISSN 1040-7782 , http://hdl.handle.net/10210/14943
- Description: The study of viscous flow in curved ducts is of fundamental interest in fluid mechanics due to the numerous applications such as flows through turbomachinery blade passages, aircraft intakes, diffusers, heat exchangers, and so on [1–6]. The major effect of curved ducts on the fluid flow involves the strong secondary flow due to the longitudinal curvature in the geometry [7–9]. The presence of longitudinal curvature generates centrifugal force (which is perpendicular to the main flow along the axis) and produces so-called secondary flow on the cross sections of ducts.
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