viscosity of fluid

Forces between molecules make fluid stick together {viscosity}|.

causes

In liquids, van der Waals forces cause viscosity. In gases, non-ideal molecular collisions cause viscosity.

pressure

Gas viscosity increases if pressure increases.

temperature

Temperature increase increases gas viscosity and decreases liquid viscosity.

factors

Fluid viscosity depends on fluid density, pressure, temperature, and velocity. In pipe, pipe-opening size affects viscosity. Intermolecular forces tend to pull fluid sideways in pipes and contribute to turbulence. Fluid sideways pressure P equals viscosity V times velocity change dv divided by length change dl: P = v * dV/dl.

Whole Section in One File

5-Physics-Dynamics-Fluid-Viscosity

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Technical Information

Date Modified: 2022.0224