Viscosity and pressure relation

In summary, the viscosity of liquids, except for water, increases with an increase in pressure while that of gases remains relatively constant. This is due to cohesive forces that increase with pressure, making it easier for liquids to flow. However, there are differences between chemistry and physics, so not all substances behave the same way under pressure.
  • #1
Hardik Batra
130
5
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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  • #2
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.
 
  • #3
Not everything is same iin chem and phy some differences are also there..
 

1. What is viscosity?

Viscosity is a measure of a fluid's resistance to flow. It is a property of a fluid that describes how easily it can deform and flow. The higher the viscosity, the more resistant the fluid is to flow.

2. How does viscosity affect pressure?

The viscosity of a fluid is directly related to the pressure required to move it. In other words, as viscosity increases, so does the pressure required to move the fluid. This is because more pressure is needed to overcome the resistance to flow caused by the higher viscosity.

3. What is the relationship between viscosity and pressure?

The relationship between viscosity and pressure is known as the viscosity-pressure relation. It describes how changes in viscosity affect pressure and vice versa. Generally, an increase in viscosity leads to an increase in pressure.

4. How does temperature affect viscosity and pressure?

Temperature has a significant effect on both viscosity and pressure. As temperature increases, the viscosity of a fluid decreases, which means it becomes easier to flow and requires less pressure to move. On the other hand, as temperature increases, the pressure required to move the fluid also increases due to the decrease in viscosity.

5. What are some real-world applications of the viscosity-pressure relation?

The viscosity-pressure relation is critical in various fields, including fluid dynamics, engineering, and geology. It is used to understand and predict the behavior of fluids in pipes, pumps, and other systems. It is also essential in fields such as oil and gas exploration, where knowledge of viscosity and pressure is crucial for determining the flow of fluids through porous materials.

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