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2D Flow simulations with Lattice Gas Automata

I'm using modern tools and methods to implement a very fast FHP3 binary model on your desktop

Yann Guidon / YGDESYann Guidon / YGDES
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The FHP3 model is outdated, from the physics point of view, and superseded by the Lattice Bolzmann models for to decades. However it remains a simple, powerful, accessible model for desktop simulations of subsonic turbulences.
At the turn of the millenium, I have thoroughly optimised the computations of the particles collisions using a large array of modern methods : SIMD, strip-mining, SMP, boolean reduction...
Using the fastest and latest P3@550MHz, I once reached a peak update speed of 150M sites/second, enough to see vortices develop in real time. More information is found (in french) in my Masters thesis :
http://ygdes.com/memoire/
More than 17 years later, computers have evolved to a point where this algorithm would totally scream, thanks to the ubiquitous 128/256-bits registers and on-die SMP. And I have since then learned a lot more about programming and architecture...

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starlord wrote 04/01/2018 at 05:33 • point

trying to run these type  simulations has always been a pain for me maybe you could run my space plane fuselage and see what it does when I post it in a iges file soon on my entry

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Yann Guidon / YGDES wrote 04/02/2018 at 04:34 • point

The FHP3 model is not the most efficient "in practice" for your kind of design.

It's working up to Mach 0.3, maybe 0.4, at low Reynolds. Think : model RC planes...

Furthermore, FHP3 is 2D only :-/

I've seen that desktop 2D simulations (using Navier Stockes and others) have progressed a lot recently, I don't know for 3D.

However FHP3 has value in educational and gaming applications :-) It can usually run interactively with very rich interactions.

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