As for liquids, the viscosity decreases with an increase in temperature, the same is true for water. The viscosity of water at 20 0 C is 1 centipoise or 1 cP. Suspended Particles: Suspended materials increases the viscosity.Multiphase flow: The viscosity of multiphase flow is affected by the volume of each phase.Liquids being incompressible does not have much impact. Pressure: With an increase in pressure, the viscosity of gases usually increase.Flow Conditions: For laminar flow the viscosity of liquid remains constant while for turbulent flow viscosity changes.On the contrary, the viscosity of gases increase with increase in temperature.
Fluid Temperature: Usually the viscosity of liquids decreases with an increase in temperature.
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