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questions :viskosity what is?
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[Member (365WT)]answers [Chinese ]Time :2019-05-31
Viscosity is a physicochemical property of a substance, defined as a pair of parallel plates, with an area of A, a distance of dr, filled with a liquid between the plates; now a thrust F is applied to the upper plate to produce a speed change required force.

Due to the viscosity, the object is subjected to frictional resistance and differential pressure resistance when moving in the fluid, resulting in loss of mechanical energy (see flow resistance).


Basic Features


Velocity gradient


τ= ηdv/dx =ηD


Material properties

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