How to Create More Pathlines (Streamlines?) over Airfoil

- May 1, 2019 at 12:57 am
  
  Antang
  Subscriber
  
  Hi,
  
  I've done a simulation of airflow over a modified airfoil but I want to see and possibly get a video of the streamlines over the airfoil. I recently switched to ANSYS 19.2 and I cannot seem to find a streamline function and the pathlines function does not have enough pathlines. I've played around and cannot find it anywhere on how to add more streamlines to have a more accurate representation. I have attached what I see and you can see that i would probably want like 10x more streamlines around the arifoil but I don't see any defined input on how many lines there are.
- May 1, 2019 at 1:18 pm
  
  Rob
  Forum Moderator
  
  Staff can't open attachments so please post images into your text.
  
  In Fluent pathlines are released at every facet centre. If you need more, create a line (rake) where you want it and make sure you create that with many points.
- May 8, 2019 at 6:19 am
  
  Antang
  Subscriber
  
  Hi, is there anyway to have pathlines show in CFD post? Or can you make pathlines show in the backward direction in Fluent?
- May 8, 2019 at 6:21 am
  
  Antang
  Subscriber
- May 8, 2019 at 6:22 am
  
  Antang
  Subscriber
  
  I want to show the pathline direction at an outlet of a modified winglet and the streamlines are very sensitive so I can only make it appear when I do the backwards streamlines in CFD post, but CFD post does not allow for pathlines so I only can have streamlines like this
- May 8, 2019 at 6:23 am
  
  Antang
  Subscriber
  
  The vector function doesnt look any better
- May 8, 2019 at 6:29 am
  
  Antang
  Subscriber
  
  So basically I want to create pathlines that look like the 2nd figure with directional arrows but over the whole modified airfoil (or that region between the winglet and the mainbody) such as the streamlines in the 3rd figure which were obtained when I did streamlines in the backwards direction from a created line directly next to the outlet of the airfoil
- May 8, 2019 at 9:28 am
  
  Rob
  Forum Moderator
  
  In terms of capability pathlines (Fluent) and streamlines (CFD Post) do the same thing: it's only a different label because of the product history.
  
  In Post (or Fluent) you can create lines (or rakes) and then release the path/stream lines from those. Both methods have an option to set a higher number of points, so adjust those until you get what you want.