Publication

Simulating Viscoplastic Avalanches.

2008
Talks

Abstract

We present a comparison between experiment and numerical results for the dam-break problem involving viscoplastic fluids. The laboratory experiment consists in releasing a fine volume of a viscoplastic fluid down inclined plane and tracking the evolution of the free surface. A finite volume, two-phase Navier-Stokes solver was extended to treat fluids with shear-rate dependent viscosity. A semiimplicit Chorin’s projection scheme in combination with a bi-conjugate gradient method is used.

Official source

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2008
Talks

Abstract

Official source

Related concepts (32)

Non-Newtonian fluid

A non-Newtonian fluid is a fluid that does not follow Newton's law of viscosity, that is, it has variable viscosity dependent on stress. In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid. Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. Many salt solutions and molten polymers are , as are many commonly found substances such as custard, toothpaste, starch suspensions, corn starch, paint, blood, melted butter, and shampoo.

Viscoplasticity

Viscoplasticity is a theory in continuum mechanics that describes the rate-dependent inelastic behavior of solids. Rate-dependence in this context means that the deformation of the material depends on the rate at which loads are applied. The inelastic behavior that is the subject of viscoplasticity is plastic deformation which means that the material undergoes unrecoverable deformations when a load level is reached. Rate-dependent plasticity is important for transient plasticity calculations.

Viscosity

The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity is defined scientifically as a force multiplied by a time divided by an area. Thus its SI units are newton-seconds per square metre, or pascal-seconds. Viscosity quantifies the internal frictional force between adjacent layers of fluid that are in relative motion.

Related publications (32)

Simulating Viscoplastic Avalanches.

Chat with Graph Search

Mimetic finite difference schemes for transport operators with divergence-free advective field and applications to plasma physics

Energy balance of fluid driven frictional rupture in fractured rocks

Verification of techniques for accelerated and stable SOLPS-ITER simulations including plasma drifts