DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf
ISBN Print: 978-1-56700-262-1
ISSN: 2377-2816
Numerical investigation of spectrums of turbulent convection
ABSTRAKT
Three-dimensional turbulent convectional flows of viscous and incompressible fluid in a horizontal layer numerically is simulated at heating from below. The boundaries of a layer are stress-free. For temperature pulsations the Kolmogorov k−5/3 and k−2.4 spectrums have been found. Also we observed for velocity pulsations the Obukhov-Bolgiano k−11/5, k−3 and k−5 spectrums. The last spectrum had been suggested in theoretical works for liquid with large Prandtl number and spectrum k−3 has been derived in numerical simulations of turbulent convection. The present results are in agreement with experimental results and expand the numerical results of other authors.