A DNS simulation of an interface between a decaying turbulent flow without mean shear and a quiescent non-turbulent region is presented here. The analysis of the instantaneous fields highlight a complex multi-scale behaviour at the turbulent/non-turbulent interface. According to previous results in the literature, by analysing the enstrophy budgets it is possible to observe that enstrophy propagate from the turbulent region mainly by inviscid process while viscous diffusion is relevant only at the interface.
A numerical study of the shear-less turbulent/non-turbulent interface / Cocconi, G., Cimarelli, A., Frohnapfel, B., De Angelis, E. (SPRINGER PROCEEDINGS IN PHYSICS). - In: Springer Proceedings in PhysicsHEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY : Springer Science and Business Media, LLC, 2016. - ISBN 9783319291291. - pp. 37-40 [10.1007/978-3-319-29130-7_6]
A numerical study of the shear-less turbulent/non-turbulent interface
Cimarelli A.;
2016
Abstract
A DNS simulation of an interface between a decaying turbulent flow without mean shear and a quiescent non-turbulent region is presented here. The analysis of the instantaneous fields highlight a complex multi-scale behaviour at the turbulent/non-turbulent interface. According to previous results in the literature, by analysing the enstrophy budgets it is possible to observe that enstrophy propagate from the turbulent region mainly by inviscid process while viscous diffusion is relevant only at the interface.
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