Physics – Fluid Dynamics
Scientific paper
2009-07-11
Physical Review E, 81, 056316 (2010)
Physics
Fluid Dynamics
Final published version
Scientific paper
10.1103/PhysRevE.81.056316
We compute the spectra and fluxes of the velocity and temperature fields in Rayleigh-B\'{e}nard convection in turbulent regime for a wide range of Prandtl numbers using pseudo-spectral simulations on $512^3$ grids. Our spectral and flux results support the Kolmogorov-Obukhov (KO) scaling for zero Prandtl number and low Prandtl number ($P=0.02$) convection. The KO scaling for the velocity field in zero-Prandtl number and low-Prandtl number convection is because of the weak buoyancy in the inertial range (buoyancy is active only at the very low wavenumbers). We also observe that for intermediate Prandtl numbers ($P=0.2$) the KO scaling fits better with the numerical results than the Bolgiano-Obukhov (BO) scaling. For large Prandtl number ($P=6.8$), the spectra and flux results are somewhat inconclusive on the validity of the KO or BO scaling, yet the BO scaling is preferred over the KO scaling for these cases. The numerical results for P=1 is rather inconclusive.
Mishra Pankaj Kumar
Verma Mahendra K.
No associations
LandOfFree
Energy spectra and fluxes for Rayleigh-Benard convection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Energy spectra and fluxes for Rayleigh-Benard convection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy spectra and fluxes for Rayleigh-Benard convection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-619918