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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

Heat transfer in dry granular flows. Another tur bulence

pages 1365-1368
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1390
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SINOPSIS

We consider a special kind of liquid, granular matter, and investigate its ability to transfer heat while flowing. Using discrete element simulations, we show that large correlated motions of grains develop in dense granular sheared layer, and lead to a strong heat transfer across the streamlines. This process is similar to the convection induced by eddies in turbulent flows. However, granular eddies do not result from the visco-inertial instability, but from the steric exclusion of closely packed grains. As a result, they seem to develop even at very low shear rates, which could have a significant practical interest. Beyond their different natures, classical turbulence and granular turbulence face similar challenges, and it is hoped that research in these two fields can benefit from each other.

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