# Problem with streamline in CFX (results)

Member

Hi guys, I'm trying to plot streamline around my airfoil after aerodynamics analysis (inviscid) at lift coefficient =0.
I've a problem in the post-processing when i try to plot streamline around the airfoil using CFX tool (Results) of ANSYS 19 R2. I've obtained that the streamline pass through the airfoil instead of surrounding it. How can I solve the problem ?

• GermanyForum Coordinator
edited February 3

Can you show velocity vectors?

• Member
edited February 3

Hi Amine, of course!

p.s. How can I remove velocity vectors from airfoil perimeter ?

• GermanyForum Coordinator
edited February 3

Inviscid= there is a slip at wall + no penetration.

• Member
edited February 3

Ok, Is this prompt to solve the streamlines problem or that one regarding the velocity vector on "perimeter"?

• GermanyForum Coordinator
edited February 3

I do not understand your question: the suggestion to use vectors is just a workaround for you. If you think the behavior with streamlines is buggy you need to share more details about their creation and where you created the solution.

• Member
edited February 3

I've obtained the solution using Fluent, it's an inviscid, incompressible analysis. I chose the angle of attack to obtain Cl=0(zero lift). Then I've used CFD-post for the results post-processing and there is the problem that I've showed in the first message of this discussion: streamlines passing through the airfoil.
Running other simulations, I did not have this problem.

• GermanyForum Coordinator
edited February 11

If the streamlines in Fluent are looking fine just use them from Fluent or do export massless particle tracks from Fluent to CFD-Post if you prefer post-processing in Fluent. Also check if you can create surface streamlines in Post, as I assume you ran it 2D in Fluent.

• Member
edited February 11

Hi everyone! I've solved the problem using the following commands: geometry->type>surface streamline.

• GermanyForum Coordinator
edited February 11

Thanks for the update and sharing what worked with your case.