'T-RANS' simulation of deterministic eddy structure in flows driven by thermal buoyancy and lorentz force. Hanjali?, K. & Kenjere?, S. Flow, Turbulence and Combustion, 2001. abstract bibtex The paper reports on the application of the Time-dependent Reynolds-Averaged Navier-Stokes (T-RANS) approach to analysing the effects of magnetic force and bottom-wall configuration on the reorganisation of a large coherent structure and its role in the transport processes in Rayleigh-B?nard convection. The large-scale deterministic motion is fully resolved in time and space, whereas the unresolved stochastic motion is modelled by a 'subscale' model for which the conventional algebraic stress/flux expressions were used, closed with the low-Re number -- three-equation model. The applied method reproduces long-term averaged mean flow properties, turbulence second moments, and all major features of the coherent roll/cell structure in classic Rayleigh-B?nard convection in excellent agreement with the available DNS and experimental results. Application of the T-RANS approach to Rayleigh-B?nard convection with wavy bottom walls and a superimposed magnetic field yielded the expected effects on the reorganisation of the eddy structure and consequent modifications of the mean and turbulence parameters and wall heat transfer.
@article{
title = {'T-RANS' simulation of deterministic eddy structure in flows driven by thermal buoyancy and lorentz force},
type = {article},
year = {2001},
identifiers = {[object Object]},
keywords = {[Deterministic eddy structure, Numerical simulatio},
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abstract = {The paper reports on the application of the Time-dependent Reynolds-Averaged Navier-Stokes (T-RANS) approach to analysing the effects of magnetic force and bottom-wall configuration on the reorganisation of a large coherent structure and its role in the transport processes in Rayleigh-B?nard convection. The large-scale deterministic motion is fully resolved in time and space, whereas the unresolved stochastic motion is modelled by a 'subscale' model for which the conventional algebraic stress/flux expressions were used, closed with the low-Re number <k>-<?>-<?2> three-equation model. The applied method reproduces long-term averaged mean flow properties, turbulence second moments, and all major features of the coherent roll/cell structure in classic Rayleigh-B?nard convection in excellent agreement with the available DNS and experimental results. Application of the T-RANS approach to Rayleigh-B?nard convection with wavy bottom walls and a superimposed magnetic field yielded the expected effects on the reorganisation of the eddy structure and consequent modifications of the mean and turbulence parameters and wall heat transfer.},
bibtype = {article},
author = {Hanjali?, K. and Kenjere?, S.},
journal = {Flow, Turbulence and Combustion},
number = {4}
}
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