Titlebook: Dynamic Response of Granular and Porous Materials under Large and Catastrophic Deformations; Kolumban Hutter,Nina Kirchner Book 2003 Sprin

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Fazit, recent years significant progress has been made in describing the flow of granular avalanches over complex rigid topography. Often the fluid-like granular avalanches flow over a region of solid-like grains at which there may be erosion or deposition. These phase-transition flows are very poorly und

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Oktay Bilgi,Marie Frühauf,Kathrin Schulzeated experiments over the past 60 years. Both full-size tests in instrumented avalanche tracks and laboratory experiments with snow or substitute materials are used to extract information on two major questions: (i) Which flow regimes are possible in avalanches and under which conditions do they occ

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Zwischen Schutzauftrag und Generalverdachtapted to describe the dense, lower part of a snow avalanche. In order to account for the high velocities of snow avalanches, a velocity dependent bed shear stress in addition to the . law for dry friction is introduced. Since the model has to be applied to arbitrarily shaped topographies, certain si

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Zwischen Schutzauftrag und Generalverdachtxtures of solid particles and of an interstitial fluid and are easily modelled on the microscopic level by the laws of mechanics. On mesoscopic and macroscopic levels the different scales of the influence of the particles, the fluid and their interaction lead to various models of avalanching flows.

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Oktay Bilgi,Marie Frühauf,Kathrin Schulzeurface flow of granular avalanches. All similarity solutions of this system are found by means of group analysis. The family of solutions which are invariant to stretching transformations is investigated in greater detail. Explicit solutions are constructed in three cases and their physical interpre

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Oktay Bilgi,Marie Frühauf,Kathrin Schulze of bulk waves in fully saturated materials. These materials are modelled by a two-component immiscible mixture. We present general propagation conditions for such a model which yield three modes of propagation: P1-, S-, and P2-waves. Then we discuss the dispersion relation and show that results are

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