Numerical simulations of soft and hard turbulence - Preliminary results for two-dimensional convection

Details Numerical simulations of soft and hard turbulence - Preliminary results for two-dimensional convection Numerical simulations of soft and hard turbulence - Preliminary results for two-dimensional convection

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..64.2370d&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 64, May 14, 1990, p. 2370-2373. Research supported by NASA.

Mathematics

Probability

57

Boussinesq Approximation, Rayleigh-Benard Convection, Turbulence, Two Dimensional Flow, Heat Flux, Probability Density Functions, Rayleigh Number, Temperature Distribution

Scientific paper

Results on the transition from soft to hard turbulence in simulations of two-dimensional Boussinesq convection are reported. The computed probability densities for temperature fluctuations are exponential in form in both soft and hard turbulence, unlike what is observed in experiments. In contrast, a change is obtained in the Nusselt number scaling on Rayleigh number in good agreement with the three-dimensional experiments.

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