It is true that pressure is a contributor to the stress tensor, but this contribution is independent of the portion related to the shear viscosity.werson tan said:Homework Statement
I was told that kinematic viscosity depends on pressure , but not dynamic viscosity
Homework Equations
The Attempt at a Solution
in my opinion, the dynamic viscosity depends on pressure , since it's formula is μ = tau / (du/dy) , where tau is the stress . and stress can be somehow related to pressure
so , which is correct ? kinematic viscosity or dynamic viscosity depends on pressure?Chestermiller said:It is true that pressure is a contributor to the stress tensor, but this contribution is independent of the portion related to the shear viscosity.
For an ideal gas, kinematic viscosity varies inversely with pressure (because density is proportional to pressure), and dynamic viscosity does not vary with pressure.werson tan said:so , which is correct ? kinematic viscosity or dynamic viscosity depends on pressure?
Kinematic viscosity is a measure of a fluid's resistance to flow under the influence of gravity, and is defined as the ratio of dynamic viscosity to density.
As pressure increases, the molecules in a fluid are pushed closer together, resulting in a higher density and a decrease in kinematic viscosity.
No, the relationship between kinematic viscosity and pressure is not always linear and can depend on the properties of the fluid being studied.
No, kinematic viscosity is typically calculated using measurements of dynamic viscosity and density, as these are easier to measure directly.
Kinematic viscosity is an important parameter in industries such as oil and gas, where it is used to determine the flow properties of fluids and can help with the design and optimization of pipelines and other equipment.