[Cuis-dev] Ideal gas and real gas simulation

[Hilaire Fernandes]

Hi,

When discussing with Physics teacher at my school, its appears gas 
simulation is something desired. There are some simulation out there, 
but they keep mentioning me it is a nice tool to have. So I gave a shoot 
and start the implementation of a DKM[1] for the Dybo project.

A first iteration was a very naive, kind of billiard: 
https://mamot.fr/@drgeo/115577138308536197

Then hack some energy transfer from the wall:

https://mamot.fr/@drgeo/115598616477391933
https://mamot.fr/@drgeo/115600731271105530

However this implementation was not correct from the thermodynamic 
perspective, so I implement a real diffuse energy transfer model: 
https://mamot.fr/@drgeo/115623761342500850

This gave a more or less realistic simulation of ideal gas.

The next challenge was to have inter-atomic potential to be considered: 
atom can be attracted or repulsed from each other. The Lennard-Jones law 
was used. The tricky part was really the scale and simulation step time:

Atom can get crazy unrealistic velocity 
https://mamot.fr/@drgeo/115669231450451191 because of not small enough 
simulation time.

With a fined tuned simulation time and Morph step time of 100Hz, the 
result are quite interesting: https://mamot.fr/@drgeo/115669511921472246

The final model has both diffuse energy transfer from the wall and 
inter-atomic potential calculus.

Again, the Cuis environment proved to be extremely helpful to fine tune 
the algorithm.

Of course this DKM can be used from a Dybo document, as seen there with 
another DKM: https://mamot.fr/@drgeo/115400315017925601

The aims is develop hundreds of such modules.

Hilaire

[1] 
https://github.com/Dynamic-Book/doc/tree/main/4-Explanations/200-Dynamic-Knowledge-Models

-- 
http://mamot.fr/@drgeo
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