User talk:Thierry Dugnolle

ArbCom 2023 Elections voter message

Hello! Voting in the 2023 Arbitration Committee elections is now open until 23:59 (UTC) on Monday, 11 December 2023. All eligible users are allowed to vote. Users with alternate accounts may only vote once.

The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to impose binding solutions to disputes between editors, primarily for serious conduct disputes the community has been unable to resolve. This includes the authority to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail.

If you wish to participate in the 2023 election, please review the candidates and submit your choices on the voting page. If you no longer wish to receive these messages, you may add {{NoACEMM}} to your user talk page. MediaWiki message delivery (talk) 00:46, 28 November 2023 (UTC)

Potential flow around a circular cylinder with circulation

Hello Thierry! You have produced two absolutely wonderful animations of potential flow in 2 dimensions:

• zero circulation around a circular cylinder - see potential flow around a circular cylinder
• Kutta condition circulation around an airfoil - see Euler equations (fluid dynamics)

I greatly admire these two images and congratulate you for having produced them!

And now a request - would you produce a similar animation of potential flow with circulation around a circular cylinder? It would be an ideal addition at Magnus effect; and would also be useful at Lift (force) as a preliminary demonstration of the way upwash exactly matches downwash in 2-D flow around an airfoil.

I’m happy to discuss here on your Talk page if you wish. Best regards. Dolphin (t) 06:12, 4 March 2024 (UTC)

Thanks for your request. If a flow is with circulation, it can't be potential. TD (talk) 14:24, 4 March 2024 (UTC)

Perhaps I should change my request to “irrotational, inviscid, incompressible flow with circulation around a circular cylinder”.

The article Potential flow begins with a diagram of a NACA 0012 airfoil at 11 degrees angle of attack. The caption describes the image as “potential-flow streamlines” even though the streamlines display the Kutta condition. Should this diagram be removed from Potential flow; or should the caption be adjusted? Dolphin (t) 21:23, 4 March 2024 (UTC)

I don't know. About your request, may be I will make it, but it would be heavy work for me, because I lost my old code for these kinds of animations.TD (talk) 07:20, 5 March 2024 (UTC)

I understand your difficulty with new animations. The need I see on Wikipedia could be fulfilled by a simple diagram showing the streamlines but not being animated.

The sort of diagram I have in mind is visible on the internet. Here is an example:

Google for “Flow past a cylindrical obstacle Fitzpatrick”

You should get a hit on a document by Prof Richard Fitzpatrick of the University of Texas. Scroll down to the diagram of streamlines around a circle. Is such a diagram something you would be interested in producing? Dolphin (t) 06:29, 8 March 2024 (UTC)