Heat transfer experiments in rotating boundary layer flow

✍ Scribed by Yoshihiro Edo; Shinnosuke Obi; Sigeaki Masuda

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 511 KB
• Volume: 21
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00061-8

✦ Synopsis

The in¯uence of Coriolis force on heat transfer in a rotating transitional boundary layer has been experimentally investigated. The experiments have been conducted for local G ortler numbers up to 150. Heat transfer measurements have been performed for a ¯at plate with nearly uniform heat ¯ux applied to the surface, where the temperature was measured by the thermochromic liquid crystal method. The results indicate that heat transfer is enhanced when Coriolis force acts towards the wall, i.e., on the pressure surface. The velocity measurements under equivalent conditions show that Coriolis instability induces counter-rotating longitudinal vortices which augment the lateral transport of the ¯uid on the pressure surface. On the other hand, the heat transfer on the suction surface remains at the same level as compared to the case without system rotation. As a consequence, the heat transfer coecient on the pressure surface is 1.8 times higher than that measured on the suction surface when averaged over the measured surface.