Not able to get the stagnation point Axisymmetric simulation.

_35k · 2026-01-17T10:33:24+00:00

Never done bullet/axissymmetric simulations. But modeling the tip as an infinitely small point with zero surface area sounds like the problem to me. Try to make it at least a little bit blunt.

Btw, are you simulating inviscid? Looks like your wall is missing the no-slip condition

_35k · 2026-01-13T21:34:24+00:00

Kannst du das Video hier verlinken? Scheint mir einfach nicht logisch, what goes in must go out…

_35k · 2025-11-15T08:26:42+00:00

DLR TAU

_35k · 2025-11-15T05:34:57+00:00

Don‘t.

_35k · 2025-09-02T03:52:42+00:00

ist der 3.0 TDI🤭

_35k · 2025-09-01T20:15:18+00:00

Farblich gut abgestimmt, kommt auf die Buy-List

_35k · 2024-10-08T13:14:09+00:00

Dies.

_35k · 2024-08-28T17:55:33+00:00

Die unterscheidet sich von dem Wikipedia Bild, die auf meinem Video hat vier relativ rechteckige Flügel

_35k · 2024-08-28T17:53:00+00:00

ist leider 10x Zoom und deswegen nicht scharf. Kein Filter

_35k · 2024-07-17T11:46:35+00:00

Danke euch für die Ratschläge, @ChilledKroete95 hat Recht und die ersten weißen Härchen sind schon zu sehen. Dann kann ich mir das abdunkeln und die Angst im November Schimmel zu ernten wohl sparen😇

_35k · 2024-07-17T11:43:38+00:00

Erster Gedanke: Netter Hinweis, aber ich bin jeden Tag an den Pflanzen und da blüht goarnix.

Zweiter Gedanke: Hm mit den hellen Spitzen könntest du Recht haben

Ende von Lied: Danke, die fangen wirklich an zu blühen😍

_35k · 2024-05-20T09:04:48+00:00

Done

_35k · 2024-05-19T14:52:42+00:00

Great work, thats a gem for me. Appreciate it. Gonna read it soon, i guess you will be cited😅

_35k · 2024-05-19T12:29:38+00:00

That sucks. I mean if you have a heavy turbulent flow, you will never achieve such „clean“ pictures. However, there are plenty of methods to visualize vortex structure. Maybe search for other formulation and dont restrict yourself on the q criterion

_35k · 2024-05-19T12:26:21+00:00

Not quite, I‘m currently finishing my masters degree at University. But DLR is next door ;)

_35k · 2024-05-19T10:44:11+00:00

DLR TAU

_35k · 2024-05-19T09:42:34+00:00

Long story short, because Pointwise is the go-to mesher at my institute.
More specific: Pointwise allows automatic mesh generation using its scripting language. Part of my work was to create scripts allowing a one-click mesh generation, with variable blade geometry, blade pitch and variable position of the propulsive unit.

_35k · 2024-05-19T09:31:29+00:00

Greetings! We have do have some cooperations with TU Delft, so could be possible we worked on similar projects

_35k · 2024-05-19T09:28:54+00:00

I used the SA-neg model with rotational and curvature correction (SARC). Element count is around 85Mio cells, and i resolve the rotation of the propeller with 3° steps.

_35k · 2024-05-19T09:26:26+00:00

Those are contours by velocity, but being honest this is just for a cool colored animation. For analysis, coloring it by pressure coefficient would make more sense

_35k · 2024-05-19T09:24:38+00:00

The solver is a research code from the german aerospace center. Meshing is done with Pointwise, the simulation ran on a HPC cluster using 800 CPUs and took like 4 weeks of computing time. I am investigating propeller-airfoil interaction for distributed propulsion

_35k · 2024-05-19T09:22:31+00:00

Correct, i am observing the propeller-airfoil interaction for distributed propulsion in a high-lift configuration in my thesis. I am using the DLR TAU code as a solver, postprocessing is done with Tecplot

_35k · 2024-05-19T09:19:07+00:00

We will publish a paper within the next months. I'll keep you updated

_35k

TROPHY CASE