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Investigation of natural convection in convergent vertical channels
Author(s) -
Said S. A. M.
Publication year - 1996
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/(sici)1099-114x(199607)20:7<559::aid-er115>3.0.co;2-j
Subject(s) - natural convection , mechanics , rayleigh number , merge (version control) , rayleigh scattering , channel (broadcasting) , heat transfer , convection , mathematics , physics , materials science , geometry , thermodynamics , optics , engineering , telecommunications , computer science , information retrieval
Using air as the working fluid, natural convection heat transfer in a uniform wall temperature convergent vertical channel has been investigated numerically. The investigation encompassed half angles of convergence between 0° (parallel‐walled channel) and 10° and the solutions were performed for ( S/L ) Ra s range of 1 to 2 × 10 4 . In order to find a correlation format which will merge the convergent channel results for low Rayleigh number ranges ( Ra ′ < 10 2 ) with those for the parallel‐walled channel ones, the minimum ( S min ), mean ( S avg ), and maximum ( S max ) interval spacing between channel walls were used as characteristic dimensions. It was found that merging was best achieved by the use of maximum interval spacing ( S max ) as the characteristic dimension. These numerical findings agree with those for high Rayleigh number ranges ( RA ′ > 10 2 ) reported in the literature.