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Information-Based Symbolic Regression of Local Closures for RANS Transition Modeling
Capel-Jorquera J +4 more
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Turbulence Transport Equations
The Physics of Fluids, 1967A generalized eddy viscosity function σ, is introduced in order that the Reynolds stress in an incompressible fluid be expressible as a linear combination of the Kronecker and rate-of-strain tensors. A transport equation for the eddy viscosity is derived from the general turbulence energy equation, thereby introducing two additional functions, the ...
Harlow, F. H., Nakayama, P. I.
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Barriers for Transport in Turbulent Plasmas
Physical Review Letters, 2003The control of transport due to electrostatic turbulence is investigated using test-particle simulations. We show that a barrier for the transport, that is, a region where transport is reduced, can be generated through the randomization of phases of the turbulent field.
CARBONE, Vincenzo +2 more
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On the turbulent transport of a passive scalar by anisotropic turbulence
Physics of Fluids, 1996The effect of anisotropic turbulence on the vertical transport of a tracer in a fluid layer is investigated numerically. It is found that for a fixed vertical turbulence spectrum an increase in the intensity of horizontal turbulence reduces the efficiency of the vertical transport.
Vincent, A., Michaud, G., Meneguzzi, M.
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Turbulent Transport in Stellar Interiors
Theoretical and Computational Fluid Dynamics, 1998The authors consider differential rotation as a major cause of turbulence in stably stratified stellar interiors. It is shown that for an anisotropy \(A\) of horizontal to vertical velocities, the vertical diffusivity is a factor \(A^2\) less than the horizontal diffusivity. Transport by meridional circulation is also reduced, as well as the efficiency
Michaud, G., Zahn, J.-P.
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Turbulent Particle Transport in Magnetized Plasmas
Physical Review Letters, 2003Particle transport in magnetized plasmas is investigated with a fluid model of drift wave turbulence. An analytical calculation shows that magnetic field curvature and thermodiffusion drive an anomalous pinch. The curvature driven pinch velocity is consistent with the prediction of turbulence equipartition theory.
Garbet X +6 more
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AIP Conference Proceedings, 2008
Impurity transport is an important topic for ITER as impurity density in the core has to stay below a relative concentration of 5×10−5 [1] to reach ignition conditions. The reasons for that is mainly impurity radiation leading to cooling. In the edge region on the other hand site, higher impurity densities, going along with radiation energy losses are ...
Volker Naulin +7 more
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Impurity transport is an important topic for ITER as impurity density in the core has to stay below a relative concentration of 5×10−5 [1] to reach ignition conditions. The reasons for that is mainly impurity radiation leading to cooling. In the edge region on the other hand site, higher impurity densities, going along with radiation energy losses are ...
Volker Naulin +7 more
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Nondeterministic Dynamics and Turbulent Transport
Annales Henri Poincaré, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Transport Phenomena in Turbulent Flows
2015In this chapter we intend to provide a brief introduction to the study of transport phenomena in the presence of turbulent flows. This is a very large and quite specialized topic, and here we will confine our treatment to some basic features, above all in the context of pipe flow, referring the interested readers to more specialized texts (See, for ...
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