Turbulent heat transport regimes in a channel

In this paper we focus on the turbulent transport of a scalar through a channel. The scalar flux, and the corresponding scalar concentration gradient along the channel allow to define a Nusselt number and a Grashof number. While the relation between the large scale velocity field and the input energ...

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Bibliographic Details
Published in:Physical review fluids 2017-06, Vol.2 (6), Article 062801
Main Authors: Castaing, B., Rusaouën, E., Salort, J., Chillà, F.
Format: Article
Language:English
Subjects:
Fluid mechanics
Mechanics
Physics
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Summary:In this paper we focus on the turbulent transport of a scalar through a channel. The scalar flux, and the corresponding scalar concentration gradient along the channel allow to define a Nusselt number and a Grashof number. While the relation between the large scale velocity field and the input energy rate show a perfect inertial (turbulent) behavior, three different regimes can be distinguished, with different scalings between Nusselt and Grashof numbers.
ISSN:2469-990X
2469-990X
DOI:10.1103/PhysRevFluids.2.062801