Dresden 2009 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 12: Poster I

DY 12.14: Poster

Dienstag, 24. März 2009, 14:30–16:30, P1A

Experimental and numerical studies of avalanche motion — •Christian Kröner, Birte Domnik, and Shiva P. Pudasaini — Steinmann Institut, Universität Bonn

The motion of avalanches can be divided into three parts: starting zone, track and deposition area. Normally the flow along the track can be described by the Savage-Hutter model[1], a depth-integrated continuum model. Since in the beginning and the end of the motion the vertical velocity cannot be neglected, a non depth-integrated model is required. This also holds for the impact of an avalanche on obstacles, which are often mounted on avalanche paths for protection. The main challenge in modelling a real three dimensional flow, is to find an appropriate description of the stresses inside the material. Therefore, numerical simulations using different stress models[2] are compared to a model experiment.

[1] S.B. Savage, K. Hutter, J. Fluid Mech. 199,177-215 (1989)

[2] C. Fang, Y. Wang, K. Hutter, Continuum Mech. Thermodyn. 19,423-440 (2008)