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Getting a bit further with my exploration of Computational Fluid Dynamics (CFD) this evening. Using the mighty @FreeCAD I've modelled this "Ballute" style parachute and simulated it descending at 6m/s in air. The air velocity is plotted in the images. Ace to see the turbulence in the point cloud/steam chaser view. If any #CFD experts fancy a chat.... I HAVE QUESTIONS! #OpenFOAM #FreeCAD

Following on from my earlier stuff about being inspired about parachute/recovery systems and Ballute design in @FreeCAD I've dived into setting up the CfDoF workbench and bashing through a simple tutorial pushing water through a stepped tube. I think I borked the glyph a little, but I feel like I've learnt a little... and seen a LOT to learn. #OpenFOAM #CFD #Paraview

#FluidX3D #CFD v3.2 is out! I've implemented the much requested #GPU summation for object force/torque; it's ~20x faster than #CPU #multithreading. 🖖😋
Horizontal sum in #OpenCL was a nice exercise - first local memory reduction and then hardware-supported atomic floating-point add in VRAM, in a single-stage kernel. Hammering atomics isn't too bad as each of the ~10-340 workgroups dispatched at a time does only a single atomic add.
Also improved volumetric #raytracing!
github.com/ProjectPhysX/FluidX

I'm going to take advantage of the current #eruption on Mt #Etna to discuss some of the challenges of #modelling #lava flows. Buckle up (or just silence me) because this is going to be a long thread.

First of all, why do we want to model lava flows? The answer most definitely isn't «because we can», since —as I'm going to explain momentarily— we actually cannot. Still having an idea about how lava flows and sets in place is a powerful tool for the assessment (and possibly mitigation) of the associated #hazard and #risk: if we can tell how lava flows, we can tell which areas are going to be reached by the lava, and hopefully also improve the design of tactical and strategic actions that can be taken to minimize the damage.

(Of course, whether or not those actions will then be taken is an entirely different matter, but that's mostly politics, not science.)

1/

Hey folks, I have a friend who's a mechanical/civil engineer looking for CFD help modeling wind against a windy balcony. She's looking for a consultant:

"I have a client who has an extremely windy balcony. He wants to add wind screens but is unsure of the style and height and how far from the screen the wind will be directed. So basically we want a simulated wind model using a CAD drawing”

Let me know if that's your jam, I can hook you up.

Please boost!

In this episode of The Inspiring Computing podcast, Gareth interviews Jousef Murad. The conversation dives into his use of MATLAB and Python, the importance of failing fast, the nuances of marketing in technical domains, and the continuous learning required in this ever-evolving field. Jousef emphasizes the value of being a generalist and staying humble. Check it out here: buzzsprout.com/2107763/episode
#python #AI #numpy #MATLAB #CFD #podcasting #coding #programming

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Je ne sais pas si je suis excessivement optimiste ou si ça peut marcher ^^ J'ignore le degré de confiance qu'on peut accorder à ce type de simulation.

À 25km/h, la simulation me donne une résistance de l'air de 16.5N, à comparer à la résistance de 24N pour le vhéliotech intégral standard. Donc 30% mieux, alors même que j'ai ajouté la banquette et ses deux passagers. Rien que pour ça, ce carénage partiel semble intéressant.

Continued thread

Pour la visibilité, j'espère m'en sortir sans devoir regarder à travers un pare-brise (car ça complique s'il faut ajouter des essuie-glace), d'où ce concept qui, selon les simulations, remonte le flux d'air au-dessus de la tête. Le conducteur devra malgré tout probablement mettre un manteau en cas de pluie. Mais pas besoin de surpantalon grâce à la protection des jambes.

How realistic can a #CFD simulation be? Here is a 1 billion cell #FluidX3D simulation of an impacting raindrop, fully raytraced in 8K. FluidX3D contains state-of-the-art volume-of-fluid and surface tension models for highly accurate free surface simulations. Combined with my own #OpenCL #raytracing engine, results are rendered on-the-fly at resolution as large as remaining #GPU VRAM can hold. 🖖😋💧📺
youtu.be/MmLNQIW_Sic
FluidX3D is on #GitHub: github.com/ProjectPhysX/FluidX