Mixed convection from an open cavity in a horizontal channel

✍ Scribed by J.C. Leong; N.M. Brown; F.C. Lai

• Book ID: 103830882
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 323 KB
• Volume: 32
• Category: Article
• ISSN: 0735-1933
• DOI: 10.1016/j.icheatmasstransfer.2004.10.018

✦ Synopsis

Heat transfer results for mixed convection from a bottom heated open cavity subjected to an external flow are reported in this study for a wide range of the governing parameters (i.e., 1V Re V 2000, 0 V Gr V 10 6 ) over cavities with various aspect ratios (A= 0.5, 1, 2 and 4). It has been found that the Reynolds number and Garshof number control the flow pattern and the occurrence of recirculating cells while the aspect ratio has a significant influence on the orientation of these cells. Heat transfer from the cavity base approaches that of natural convection at a low Reynolds number (i.e., the asymptotic natural convection regime) and approaches that of forced convection at a high Reynolds number (i.e., the asymptotic forced convection regime). In the mixed convection regime, the heat transfer rate is reduced and the flow may become unstable. A unique heat transfer correlation which covers all three convection regimes is also presented.