Viscosity and pressure relation

AI Thread Summary
The relationship between viscosity and pressure indicates that, generally, the viscosity of liquids increases with pressure, while gases remain largely unaffected. However, water is an exception, as its viscosity decreases under increased pressure. This phenomenon is attributed to the cohesive forces within liquids; as pressure rises, these forces can enhance flow in most liquids but not in water. The discussion highlights the distinction between chemical and physical principles in understanding viscosity behavior. Understanding these dynamics is crucial for applications in fluid mechanics and material science.
Hardik Batra
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i know the relation between these two.

with increase in pressure, the viscosity of liquids (expect water] increases while that of gases is practically independent of pressure.

The viscosity of water decreases with increase in pressure.

i want to know the reason behind this.
 
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Hardik Batra said:
i know the relation between these two.

with increase in pressure, the viscosity of liquids (expect water] increases while that of gases is practically independent of pressure.

The viscosity of water decreases with increase in pressure.

i want to know the reason behind this.


it is a bit of chemistry not physiics as the pressure increases the cohessive forces increases which in turn decreases the viscosity of liquuid as
cohesive force doesn't slow water to flow easily among its own.
 
Not everything is same iin chem and phy some differences are also there..
 

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