000013942 001__ 13942
000013942 005__ 20161115094006.0
000013942 04107 $$aeng
000013942 046__ $$k2016-08-21
000013942 100__ $$aJin, Ting
000013942 24500 $$aThe influence of large-scale turbulent structure on saltation sand transport

000013942 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013942 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013942 506__ $$arestricted
000013942 520__ $$2eng$$aSaltation is an important process on aeolian sand transport, as it contributes to dust raising, bedform dynamics, and aeolian abrasion. However, the mass flux prediction remains notoriously unreliable, especially for close-to-onset saltation. Large eddy simulation and discrete particle method are employed to model the close-to-onset sand saltation in this paper. Two kinds of wall models for large eddy simulation are used as wall boundary condition, the standard model that can predict the mean wall shear stress and a new wall-model that is able to predict the fluctuating wall shear-stress from a large-scale velocity input. The results show that the latter can lead to more fluid-sheared particles and therefore higher mass flux, which demonstrate the significance of large-scale turbulent structure to unsteady environmental sediment transport.

000013942 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013942 653__ $$a

000013942 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013942 720__ $$aJin, Ting
000013942 8560_ $$ffischerc@itam.cas.cz
000013942 8564_ $$s156662$$uhttps://invenio.itam.cas.cz/record/13942/files/PO.FM09-1.02.50.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 1131, code PO.FM09-1.02.50).
000013942 962__ $$r13812
000013942 980__ $$aPAPER