Radial and tangential velocities for Inviscid flow (fluid mechanics)

  • Thread starter wahaj
  • Start date
  • #1
156
2
After I have an expression for the stream-function in a problem, I can differentiate to get the tangential and radial velocities because I need those to solve the problem. But I don't understand when the tangential velocity will be 0 and when the radial is 0. Can some on explain?
 

Answers and Replies

  • #2
20,463
4,362
After I have an expression for the stream-function in a problem, I can differentiate to get the tangential and radial velocities because I need those to solve the problem. But I don't understand when the tangential velocity will be 0 and when the radial is 0. Can some on explain?
Is this for flow past a cylinder or past a sphere?

Chet
 
  • #3
156
2
I didn't realize there was a difference but cylinders for this question.
 
  • #4
20,463
4,362
If you're referring to the radial and tangential velocity components at the surface of the cylinder, then the radial component has to be zero, since you can't have flow through the solid surface of the cylinder. For inviscid flow, the tangential component of the velocity does not have to be zero at a solid surface. The leading edge and the trailing edge of the cylinder are both stagnation points, so both components of velocity are zero at these points.

Chet
 
  • #5
156
2
Thanks for clearing this up.
 

Related Threads on Radial and tangential velocities for Inviscid flow (fluid mechanics)

Replies
13
Views
1K
Replies
17
Views
2K
  • Last Post
Replies
7
Views
6K
Replies
7
Views
997
Replies
2
Views
12K
Replies
3
Views
836
Replies
12
Views
1K
Replies
5
Views
3K
  • Last Post
Replies
7
Views
1K
  • Last Post
Replies
4
Views
7K
Top