Potential Flow Field around an Ellipse

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Discussion Overview

The discussion revolves around the theoretical approaches to creating a potential flow field around an ellipse in non-uniform flow conditions. Participants explore various methods and theories, including potential theory, conformal transformations, and panel methods, while seeking recommendations and insights on the topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant, Trent, inquires about theories applicable to potential flow fields around an ellipse in non-uniform flow, expressing difficulty in finding relevant resources.
  • Another participant shares a link to a paper on flow around ellipses, suggesting it may be relevant to the discussion.
  • A different participant proposes the use of a panel method and asks for clarification on the nature of the non-uniform flow.
  • Another participant references historical work by Joukowski, who applied potential theory and complex transformations to derive solutions for airfoils, suggesting that similar methods might be applicable to ellipses.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as multiple approaches and theories are suggested without agreement on a specific method or solution.

Contextual Notes

The discussion highlights the challenges of applying existing theories to non-uniform flow around ellipses, with references to various mathematical and theoretical frameworks that may or may not be directly applicable.

Who May Find This Useful

Researchers and students interested in fluid dynamics, particularly those focusing on potential flow theory and its applications to geometries like ellipses.

Trenthan
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Potential Flow Field around an Ellipse**

Ey guys

Just wondering if anyone knows of any theory's that can be used to create a potential field around an ellipse in non uniform flow?

I would have used a full Rankine body, but that requires uniform flow so it won't work in non uniform flow.

I looked at various theorem's like the "Circle Theorem", and modifications of it. Nothing for ellipses as far as i could find, evening stretching the search to IEEE etc.

Looked briefly at conformal transformations, tried some modeling as well no real luck.

Starting to struggle with idea's, and places to hunt, hence the post.

Any idea's, recommendations or even a hint of where to look?
I'm happy to do the footwork, just looking for some bread crumbs i could follow, that may lead me to a solution.

Cheers Trent
 
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Not sure if this is completely relevant, but here is a paper on flow around elipses:

http://pubs.acs.org/doi/abs/10.1021/ie100251w
 


Have you tried using a panel method?

How exactly is the flow non-uniform?
 


I have cited a paper from a long time ago (20s maybe) by a man named Joukowski, for which the airfoil is named. He used potential theory to come up with exact solutions for all sorts of airfoil conditions (pitching, plunging, etc). He used a complex transform of a circle to do this all. Since an ellipse is a transform of a circle, then perhaps similar methods could be used to find solutions.
 

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