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Forum: Main CFD Forum

June 15, 2020, 12:57

Replies: 7

Point where Shear Stress is 10 Pascals based on sin Velocity Profile

Views: 840

Posted By tas38

The methodology is fine. You made an error...

The methodology is fine.

You made an error going from (1) to (2) below...

(1) τw = 147651.75 * 0.00034641 * (1/2 / x^1/2)
(2) τw = 51.148 / x^1/2

Again, I cannot emphasize enough to...

Forum: Main CFD Forum

June 13, 2020, 05:35

Replies: 7

Point where Shear Stress is 10 Pascals based on sin Velocity Profile

Views: 840

Posted By tas38

1.) Your approach appears to be correct. But I...

1.) Your approach appears to be correct. But I believe you made a numerical error (it appears that 50 m/s was inserted for velocity).

2.) I highly recommend that you manipulate/derive equations...

Forum: Main CFD Forum

June 10, 2020, 09:55

Replies: 7

Point where Shear Stress is 10 Pascals based on sin Velocity Profile

Views: 840

Posted By tas38

You have an expression for \delta \left( x...

You have an expression for \delta \left( x \right). See your last image of your original post. Take the derivative and substitute into the equation you derived for the wall shear. Then insert...

Forum: Main CFD Forum

June 10, 2020, 06:50

Replies: 7

Point where Shear Stress is 10 Pascals based on sin Velocity Profile

Views: 840

Posted By tas38

Your analysis appears to be correct to me. Using...

Your analysis appears to be correct to me. Using your result for the wall shear stress, I get a location of x = 6.54 [m]. Note that in your calculation at the end, you seem to have the acceleration...

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