Talk:Blasius boundary layer

Sloppy and incomplete

Apart from the lack of citations I find this article lacking in other ways:

- The title covers only the first half of the article.

- I find the introduction to Prandtl's boundary layer equations inadequate and superfluous - there already exists a much better description on the Boundary layer page.

- Mention the application of Falkner-Skan to wedge flows.

- The boundary layer equations omit the pressure gradient which is essential for Falkner-Skan. I also think that it would be helpful to mention how Bernouilli's equation is used to express the pressure gradient in terms of velocity.

- It is remarked that the Falkner-Skan equation reduces to the Blasius equation for m=0. However, it does not in the form the presented here. One way to fix this is to add a trivial factor two to the similary parameter (in which case Blasius can be written as: $f'''+f''f=0$).

- The formulas are inconsitent using $f'$ in the first half and $df/d\eta$ in the second and it uses partial differentials where is should use ordinary differentials.

- A figure showing the effect of the pressure gradient (m) on the velocity profile would be useful.

Jprins66 (talk) 22:08, 9 February 2016 (UTC)

Prandtl y-momentum equation

-Someone changed the Prandtl y-momnentum equation to "0 = dP/dy" from the original true Prandtl momentum expression. This is obviously not the correct Prandtl expression. It is not even a correct momentum balance equation. Setting dP/dy to zero was never invoked by Blasius. It is not a condition that is required to obtain the Blasius solution. I am therefore changing it back to the correct expression. — Preceding unsigned comment added by David Weyburne (talk • contribs) 17:53, 6 April 2023 (UTC)

The link to the translation of the Blasius article is incorrect.

The linked paper is about cylinders, not walls. Aubrey Jaffer (talk) 17:31, 1 February 2024 (UTC)