Entropy analysis of a flow past a heat-generated bluff body

✍ Scribed by S. Z. Shuja; B. S. Yilbas; M. O. Budair; I. S. Hussaini

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 150 KB
• Volume: 23
• Category: Article
• ISSN: 0363-907X
• DOI: 10.1002/(sici)1099-114x(19991025)23:13<1133::aid-er543>3.0.co;2-9

✦ Synopsis

Cooling of a blu! body is a topic of interest for many engineers and scientists. Forced convection over the blu! body generates #ow separation, which in turn a!ects the heat transfer characteristics and increases the irreversibilities involved in the system. In the present study, #ow over a rectangular solid body with constant heat #ux is considered. The governing #ow and energy equations are solved in two-dimensional space numerically using a control volume approach. In order to investigate the e!ect of the #uid properties on the heating process, three di!erent #uids are taken into account. These are air, ethylene glycol and therminol. To determine the irreversibilities involved in the system, entropy analysis is carried out. It is found that #uid properties have considerable e!ect on the entropy generation. The entropy generation due to heat transfer well exceeds the entropy generation due to #uid friction. The surface temperature of the solid body highly depends on the cooling #uid employed.