Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/36393
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dc.contributor.authorChar, M.I.en_US
dc.contributor.author賈明益zh_TW
dc.contributor.authorHsu, Y.H.en_US
dc.date1998zh_TW
dc.date.accessioned2014-06-06T07:55:23Z-
dc.date.available2014-06-06T07:55:23Z-
dc.identifier.issn0271-2091zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/36393-
dc.description.abstractA computational study is performed on two-dimensional mixed convection in an annulus between a horizontal outer cylinder and a heated, rotating, eccentric inner cylinder. The computation has been done using a non-orthogonal grid and a fully collocated finite volume procedure. Solutions are iterated to convergence through a pressure correction scheme and the convection is treated by Van Leer's MUSCL scheme. The numerical procedure adopted here can easily eliminate the 'Numerical leakage' phenomenon of the mixed convection problem whereby strong buoyancy and centrifugal effects are encountered in the case of a highly eccentric annulus. Numerical results have been obtained for Rayleigh number Ra ranging from 7 x 10(3) to 10(7), Reynolds number Re from 0 to 1200 and Prandtl number Pr from 0.01 to 7. The mixed rotation parameter sigma (= Ra/PrRe2) varies from infinity (pure natural convection) to 0.01 with various eccentricities epsilon. The computational results are in good agreement with previous works which show that the mixed convection heat transfer characteristics in the annulus are significantly affected by sigma and epsilon. The results indicate that the mean Nusselt number Nu increases with increasing Ra or Pr but decreases with increasing Re. In the case of a highly eccentric annulus the conduction effect becomes predominant in the throat gap. Hence the crucial phenomenon on whereby Nu first decreases and then increases can be found with increasing eccentricity. (C) 1998 John Wiley & Sons, Ltd.en_US
dc.language.isoen_USzh_TW
dc.relationInternational Journal for Numerical Methods in Fluidsen_US
dc.relation.ispartofseriesInternational Journal for Numerical Methods in Fluids, Volume 26, Issue 3, Page(s) 323-343.en_US
dc.relation.urihttp://dx.doi.org/10.1002/(sici)1097-0363(19980215)26:3<323::aid-fld631>3.0.coen_US
dc.relation.uri2-2en_US
dc.subjectmixed convectionen_US
dc.subjectfinite volume algorithmen_US
dc.subjecteccentricityen_US
dc.subjectNusselt numberen_US
dc.subjectlaminar mixed convectionen_US
dc.subjectrotating inner cylinderen_US
dc.subjectnatural-convectionen_US
dc.subjectheat-transferen_US
dc.subjecthorizontal cylindersen_US
dc.subjectcylindrical annulien_US
dc.subjectfieldsen_US
dc.subjectschemeen_US
dc.titleComputation of buoyancy-driven flow in an eccentric centrifugal annulus with a non-orthogonal collocated finite volume algorithmen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1002/(sici)1097-0363(19980215)26:3<323::aid-fld631>3.0.co;2-2zh_TW
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