why is viscous force dissipative
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A measure of a fluid's resistance to flow. Viscous forces in a fluid are proportional to the rate at which the fluid velocity is changing in space; the proportionality constant is the viscosity.
Viscous Forces Here the frictional force increases as the first power of the relative speed between the surfaces and opposes the relative motion. Viscous friction is important for wet surfaces at small relative velocties.
Viscosity is not a force, it is a measure of resistance of movement between molecules to each other. It is shear stress in the fluid essentially. If they cannot move respective to each other then they would consist of a solid.
By dissipation I assume that you mean that this resistance will lessen, and this is true when most liquids heat up, however is the opposite with gasses.
Viscous Forces Here the frictional force increases as the first power of the relative speed between the surfaces and opposes the relative motion. Viscous friction is important for wet surfaces at small relative velocties.
Viscosity is not a force, it is a measure of resistance of movement between molecules to each other. It is shear stress in the fluid essentially. If they cannot move respective to each other then they would consist of a solid.
By dissipation I assume that you mean that this resistance will lessen, and this is true when most liquids heat up, however is the opposite with gasses.
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