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Results tagged with viscosity
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user 245414
The viscosity of a fluid is a measure of its resistance to flow, or be deformed, stirred, and changed shape.
1
vote
Suppose you have airflow through a narrow glass tube. Does the air slip at glass surface?
sufficient such that particles close to the wall are pressed against it (don't think of it as sticking) and left unable to move in any direction (You can see this is a question of diluteness and not viscosity … Physically this model is not correct: Even for high Reynolds number continuum flows near the wall viscosity and dissipation will prevail. …
- 1,849
0
votes
Is Coefficient of viscosity frame dependent? Why/Why not?
There are exotic substances such as para-azoxyanisol that have a flow-induced anisotropic viscosity (a different viscosity in flow direction, in the direction of the velocity gradient and perpendicular … So in those applications your viscosity would change with orientation to the main flow or magnetic field. Furthermore eddy viscosity of turbulence models in rotating flows is highly anisotropic. …
- 1,849
20
votes
Accepted
Deriving Stokes' law ($f_v=6\pi\eta Rv$) in a simple way
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As you can see there are three parameters that influence this behaviour: The macroscopic velocity, the length scale of the problem and the viscosity of the medium. … For very low Reynolds number $Re \ll 1$ clearly the viscosity will dominate over the inertia. …
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