What is the dynamic viscosity of air?

[Angelina21]

Homework Statement

Considering an airfoil (a flat plate) flying at 100 m/s under sea-level conditions, so the density is 1.225 kg/m³ and the length being 1 m, what is the dynamic viscosity of air? The problem is that I have two variables in one formula, Reynolds number and the viscosity.

Homework Equations

Dynamic viscosity=(density*velocity*length)/Re

The Attempt at a Solution

 

[Chestermiller]

Homework Statement

Considering an airfoil (a flat plate) flying at 100 m/s under sea-level conditions, so the density is 1.225 kg/m³ and the length being 1 m, what is the dynamic viscosity of air? The problem is that I have two variables in one formula, Reynolds number and the viscosity.

Homework Equations

Dynamic viscosity=(density*velocity*length)/Re

The Attempt at a Solution

What is the temperature? You are aware that, under these conditions, the dynamic viscosity (a physical property of the air) is a unique function of temperature that you can look up on line, right?

 

[Angelina21]

What is the temperature? You are aware that, under these conditions, the dynamic viscosity (a physical property of the air) is a unique function of temperature that you can look up on line, right?

The temperature according to sea level conditions is 15^oC. I'm aware that it's online. But doesn't the viscosity depend on velocity? Or it's always constant, no matter the velocity?

 

[Chestermiller]

The temperature according to sea level conditions is 15^oC. I'm aware that it's online. But doesn't the viscosity depend on velocity? Or it's always constant, no matter the velocity?

Like I said, it's a physical property of the air, independent of anything being done to the air.