DNS of differentially heated cavity of aspect ratio 4, Ra=1011
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- Mesh size: 111 millions of nodes (128x680x1280)
- 4-th order discretization
- 512 CPU of MareNostrum supercomputer of BSC
- Computing time around a million of CPU hours
- Performed by F. X. Trias and A. V. Gorobets at CTTC UPC.
- CFD code SCH3D.
- Rayleigh number up to 1011
- Prandtl number 0.71 (air)
- Boundary conditions: Adiabatic horizontal walls (Z axis), Isothermal vertical wall (Y axis)
Periodic (X axis)
- Non compressible newtonian fluid
- Boussinesq approximation for density variations
DNS results should be found at CTTC UPC web site.
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Illustrative results for the highest Ra number
Evolution in time of the temperature field to a statistically stationary state
Some first order statistics: temperature field and Nusselt number distribution
Some turbulent statistics
Comparison of the results for the sequence of Ra numbers
Zebra temperature snapshots
Turbulent kinetic energy
Local Nusselt number distribution
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Publications:
- F. X. Trias, A. Gorobets, M. Soria, A. Oliva,
”Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Ra-number up to 1011 - Part I: Numerical methods and time-averaged flow”,
International Journal of Heat and Mass Transfer, 53 (2010), 665-673
- F. X. Trias, A. Gorobets, M. Soria, A. Oliva,
”Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Ra-number up to 1011 - Part II: Heat transfer and flow dynamics”,
International Journal of Heat and Mass Transfer, 53 (2010), 674-683
- F. X. Trias and M. Soria and A. Gorobets and A. Oliva,
"DNS of an air-filled differentially heated cavity of aspect ratio 4 at Ra-numbers 6.4*108, 2*109, 1010,
3*1010 and 1011",
5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008), Venice, Italy, July 2008
- F.X.Trias and R. W. C. P. Verstappen and M. Soria and A. Gorobets and A. Oliva,
"Regularization modelling of a turbulent differentially heated cavity at Ra=1011",
5th European Thermal-Sciences Conference, EUROTHERM 2008,
Eindhoven, The Netherlands, May 2008
- F. X. Trias, A.V. Gorobets, M. Soria and A. Oliva, “DNS of natural convection flows on MareNostrum supercomputer”, Parallel CFD 2007, Antalya (Turkey), May 2007
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