Thermal convection for large Prandtl numbers

Siegfried Grossmann, Detlef Lohse

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Abstract

The Rayleigh-Bénard theory by Grossmann and Lohse [J. Fluid Mech. 407, 27 (2000)] is extended towards very large Prandtl numbers Pr. The Nusselt number Nu is found here to be independent of Pr. However, for fixed Rayleigh numbers Ra a maximum in the Nu(Pr) dependence is predicted. We moreover offer the full functional dependences of Nu(Ra,Pr) and Re(Ra,Pr) within this extended theory, rather than only give the limiting power laws as done in J. Fluid. Mech. 407, 27 (2000). This enables us to more realistically describe the transitions between the various scaling regimes.
Original languageUndefined
Pages (from-to)3316-3319
Number of pages4
JournalPhysical review letters
Volume86
Issue number15
DOIs
Publication statusPublished - 2001

Keywords

  • METIS-202009
  • IR-36431

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