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Fluid flows over surfaces are a very common application in fluid mechanics and heat transfer calculation. This friction force is related to the wall shear stress phenomenon. Also, by using this wall shear stress, we can calculate the total friction force of fluids over the surfaces. We prepared the friction shear force of fluids over the surfaces calculator.

## Friction Force of a Fluid Calculator

You can use the calculator below to calculate the friction forces to see if this force is bigger than the maximum allowable stress of the surface material. This calculator will be very useful in the calculation of complex engineering calculations.

The use of calculator above is very simple to use. Firstly, you just need to enter these variables;

**Skin friction coefficient:**This is the experimental coefficient between the fluid and the surface material. The friction coefficient value is unitless.**Surface area:**The area of the surface where the fluid flow takes place upon it. The unit of the surface area is m2 or ft2 in English units.**The density of fluid:**Density of the flowing fluid. The unit of density is kg/m3 or lbs/ft3.**Upstream velocity:**Velocity of the fluid flowing on the surface.

After that, click on the calculate button to see the total shear force acting on the surface. Also, the unit of the force is N or lbf.

## What is the Formula of This Friction Shear Force?

Above all, the calculation of the friction shear force is very basic. The formula to calculate it;

So, according to this formula, the coefficient of friction between the fluid and the surface has a great effect on the shear force. There is a direct correlation between the friction force of fluid and the coefficient of friction.

Also, with the increasing area of the surface, the shear friction force of the fluid increases.

In addition, there is a direct proportion between the fluid shear force and the density of the fluid. So, with the increasing density, the force increases.

The flowing velocity of the fluid has a tremendous effect on the friction force of the fluid. So the force increases by the square, with the increasing stream velocity.

## Conclusion

Finally, our calculator is very simple to use. You can use this calculator to calculate fluid shear forces acting on surfaces effectively.

Above all, Mechanicalland does not accept any responsibility for calculations made by users in calculators. A good engineer must check calculations again and again.

Also, You can find out much more calculators like this in Mechanicalland! Take a look at the other engineering calculators available in Mechanicalland!

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