Laminar heat transfer and fluid flow in the entrance region of a rotating duct with rectangular cross section : the effect of aspect ratio
- Authors: Jen, T.-C. , Lavine, A. S.
- Date: 1992
- Subjects: Heat transfer , Laminar convection , Isothermic square channels , Aspect ratio
- Type: Article
- Identifier: uj:5260 , http://hdl.handle.net/10210/14929
- Description: Please refer to full text to view abstract
- Full Text: false
Simultaneously developing laminar convection in rotating isothermal square channels
- Authors: Jen, Tien-Chien , Lavine, Adrienne S. , Hwang, Guang-Jyh
- Date: 1992
- Subjects: Laminar convection , Isothermic square channels
- Type: Article
- Identifier: uj:5257 , http://hdl.handle.net/10210/14926
- Description: Please refer to full text to view abstract
- Full Text: false
The effect of perforation sizes on laminar heat transfer characteristics of an array of perforated fins
- Authors: Shaeri, Mohammad Reza , Jen, Tien-Chien
- Date: 2012
- Subjects: Perforated fins , Heat transfer , Laminar convection
- Type: Article
- Identifier: uj:5285 , http://hdl.handle.net/10210/14954
- Description: Shaeri and Yaghoubi [25] reported the highest heat transfer rate in a laminar flow for a perforated fin with the most perforations (porosity), regardless of investigation on the effects of perforation sizes. In this study, the effects of size and number of perforations on laminar heat transfer characteristics of an array of perforated fins at the highest porosity of the study of Shaeri and Yaghoubi [25] have been numerically investigated. The Navier–Stokes and energy equations are solved by the finite volume procedure using the SIMPLE algorithm. Results show that at a specific porosity, the thermal entrance length of each perforation of a fin with a lower number of perforations is larger than that of each perforation of a fin with a higher number of perforations. Therefore, in a laminar flow and at a constant porosity, a fin with fewer perforations is more efficient to enhance the heat transfer rate compared with a fin with more perforations. Although perforated fins have higher friction drag and lower pressure drag with respect to solid fins, perforated fins do not affect total drag.
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