Bagnold Number

Encyclopedia : B : BA : BAG : Bagnold Number

Bagnold Number is used in granular flow calculations defined by:

[Ba=\frac]

Where [m] is the mass, [D] is the grain diameter, [\gamma] is the surface tension and [\mu] is the interstitial fluid viscosity.

Bagnold conducted experiments with 1 mm wax spheres suspended in a glycerin-water-alcohol mixture were sheared in a coaxial cylinder rheometer. The rheometer was cleverly designed to measure both the shear and normal forces applied to the walls. He identified two distinct flow regimes: the macroviscous and the grain inertia. These regimes can be distinguished using a quantity that is now referred to as the Bagnold number.

External links

This article contains material that originally came from a NASA website. According to their site usage guidelines, "NASA material is not protected by copyright unless noted". For more information, please review [NASA's use guidelines].

From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.