Mixed convection heat transfer and flow in vertically heated channels

C. Gau, K. A. Yih

Research output: Contribution to conferencePaperpeer-review

Abstract

Experiments are performed to study and understand buoyancy effect on the heat transfer process and flow in a finite vertical, rectangular channel. One of the wall is insulated and the opposite wall is heated uniformly. Uniform air flow is made to enter the channel. Both the case for buoyancy assisted flow and the case for opposed flow are studied. The mean velocity is controlled at values that the channel flow is either laminar or turbulent when the plate is not heated. Both flow visualization and temperature fluctuation measurements are conducted and used to provide informations on flow structure. Flow reversal occurs initially in the downstream and moves periodically upstream as the buoyancy parameter Gr/Re increases, which destabilizes the flow structure and enhances the heat transfer process in the range it traverses. The effect of buoyancy force on the local and averaged Nusselt number over the heated plate is studied. The buoyancy parameter studied ranges from 8 x 102 to 6 x 104.

Original languageEnglish
Publication statusPublished - 1990 Jan 1
EventAIAA/ASME 5th Joint Thermophysics and Heat Transfer Conference, 1990 - Seattle, United States
Duration: 1990 Jun 181990 Jun 20

Other

OtherAIAA/ASME 5th Joint Thermophysics and Heat Transfer Conference, 1990
CountryUnited States
CitySeattle
Period90-06-1890-06-20

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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