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On a physically-consistent nonlinear subgrid-scale heat flux model for LES of buoyancy driven flows

Author
Trias, F. X.; Dabbagh, F.; Gorobets, A.; Oliva, A.
Type of activity
Presentation of work at congresses
Name of edition
10th International Conference on Computational Fluid Dynamics
Date of publication
2018
Presentation's date
2018-07-10
Book of congress proceedings
ICCFD10 Proceedings
First page
1
Last page
13
Project funding
Advanced numerical algorithms for the improvement of the efficiency applied to wind-energy and solar thermal: tackling with new computational arquitectures
Ajut per a contractació RYC-2012-11996
Repository
http://hdl.handle.net/2117/127736 Open in new window
URL
http://www.iccfd.org/iccfd10/papers/ICCFD10-313-Paper.pdf Open in new window
Abstract
Small-scale dynamics is the spirit of turbulence physics. It delivers complex mechanisms when turbulence is purely sustained by buoyancy. This takes place in Rayleigh-Bénard convection (RBC). Most of the existing RBC dynamics is ruled by hard turbulent regime and a deep understanding of small scale dynamics with its relevant nonlinearities, is still unsatis¿ed. To do so, the evolution of QG =-1/2tr(G2) and RG =-1/3tr(G3), invariants of the velocity gradient tensor, G = Gradu u u, in their phas...
Citation
Trias, F. X. [et al.]. On a physically-consistent nonlinear subgrid-scale heat flux model for LES of buoyancy driven flows. A: International Conference on Computational Fluid Dynamics. "ICCFD10 Proceedings". 2018, p. 1-13.
Keywords
Buoyancy-driven ¿ows, LES, SGS models, Turbulence
Group of research
CTTC - Heat and Mass Transfer Technological Center

Participants