Solving for Shear Stress Using Tau and Nu

[krnhseya]

Homework Statement

Tau = (some constant) * Nu

Homework Equations

Shear stress = (some constant) * Kinematic Viscosity

The Attempt at a Solution

n/a

Thanks!

 

[krnhseya]

Is it simply shear rate? ?

 

[HallsofIvy]

I honestly cannot tell what question you are asking!

 

[krnhseya]

Shear stress = (some constant) * Kinematic Viscosity

I am looking for (some constant)'s name.
I remember seeing this equation and I just can't remember this constant's name...(or perhaps what that is called.)

I am thinking the shear rate(?).

 

[stewartcs]

Shear stress = (some constant) * Kinematic Viscosity

I am looking for (some constant)'s name.
I remember seeing this equation and I just can't remember this constant's name...(or perhaps what that is called.)

I am thinking the shear rate(?).

For a Newtonian Fluid, it is the shear rate.

http://en.wikipedia.org/wiki/Newtonian_fluid

CS

 

[krnhseya]

For a Newtonian Fluid, it is the shear rate.

http://en.wikipedia.org/wiki/Newtonian_fluid

CS

Newtonian Fluid is linear so I guess the shear rate is wrong(?).
If it's non-Newtonian Fluid, is there such constants that goes right in?

 

[stewartcs]

Newtonian Fluid is linear so I guess the shear rate is wrong(?).
If it's non-Newtonian Fluid, is there such constants that goes right in?

In a Newtonian Fluid the relationship between the shear stress and strain rate is linear. The constant of proportionality is the viscosity. That's why it is linear. The shear rate is used in the equation you where asking about.

In Non-Newtonian Fluids, the viscosity is dependent on the relationship between the shear stress and strain rate which is non-linear.

CS