Naslov
Improvements of the viscous treatment of the snow phase in two-way coupled Eulerian-Eulerian simulations of drifting snow

Autori
Boutanios, Z. ; Jasak, H.

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), ostalo

Izvornik
Proceedings of the 8th International Conference on Snow Engineering / Delpech, P. ; Thiis, T. - Lahti : CSTB - Centre scientifique et technique du bâtiment, France, 2016, 20-25

Skup
8th International Conference on Snow Engineering

Mjesto i datum
Nantes, Francuska, 12.06.2016. - 17.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
drifting snow, Eulerian-Eulerian, viscous treatment

Sažetak
This paper presents an extension to a viscous model of the snow phase developed by the authors. The original model is developed from first principles, based on analogy between Lagrangian and Eulerian representations of the snow phase in the creeping layer. Here, the original model is extended to the snowbed, the saltation and the suspension layers, and both original and new viscous models are compared and discussed. The original formulation consists of a two-way coupled four-equation Navier-Stokes system with all drifting snow layers resolved, for a single snow particle size. Validations of the original viscous model against controlled wind tunnel drifting snow experiments showed good agreement in the snow fluxes in the saltation layer, provided the separately computed contributions of several snow particle size classes are combined in a two-parameter Gamma particle size distribution. The extended viscosity model is seen to greatly improve the predictions of snow fluxes in the suspension layer, providing a good match to experimental measurements. No improvements are seen in the airflow velocity and turbulent kinetic energy profiles since the momentum coupling term between phases is not affected by the improvements. Recommendations are made for future work.

Izvorni jezik
Engleski

POVEZANOST RADA