<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> This is amazing and beautifol! Thanks Hilaire! <div class="moz-cite-prefix">On 2025-12-07 7:01 AM, Hilaire Fernandes via Cuis-dev wrote: </div> <blockquote type="cite" cite="mid:84df4bfb-2ec0-4206-8ad8-ec6c783c35ae@free.fr"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> 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: <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115577138308536197" moz-do-not-send="true">https://mamot.fr/@drgeo/115577138308536197</a> Then hack some energy transfer from the wall: <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115598616477391933" moz-do-not-send="true">https://mamot.fr/@drgeo/115598616477391933</a> <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115600731271105530" moz-do-not-send="true">https://mamot.fr/@drgeo/115600731271105530</a> However this implementation was not correct from the thermodynamic perspective, so I implement a real diffuse energy transfer model: <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115623761342500850" moz-do-not-send="true">https://mamot.fr/@drgeo/115623761342500850</a> 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 <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115669231450451191" moz-do-not-send="true">https://mamot.fr/@drgeo/115669231450451191</a> because of not small enough simulation time. With a fined tuned simulation time and Morph step time of 100Hz, the result are quite interesting: <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115669511921472246" moz-do-not-send="true">https://mamot.fr/@drgeo/115669511921472246</a> 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: <a class="moz-txt-link-freetext" href="https://mamot.fr/@drgeo/115400315017925601" moz-do-not-send="true">https://mamot.fr/@drgeo/115400315017925601</a> The aims is develop hundreds of such modules. Hilaire [1] <a class="moz-txt-link-freetext" href="https://github.com/Dynamic-Book/doc/tree/main/4-Explanations/200-Dynamic-Knowledge-Models" moz-do-not-send="true">https://github.com/Dynamic-Book/doc/tree/main/4-Explanations/200-Dynamic-Knowledge-Models</a> <pre class="moz-signature" cols="72">-- <a class="moz-txt-link-freetext" href="http://mamot.fr/@drgeo" moz-do-not-send="true">http://mamot.fr/@drgeo</a></pre> <fieldset class="moz-mime-attachment-header"></fieldset> </blockquote> <pre class="moz-signature" cols="72">-- Juan Vuletich <a class="moz-txt-link-abbreviated" href="http://www.cuis.st">www.cuis.st</a> github.com/jvuletich researchgate.net/profile/Juan-Vuletich independent.academia.edu/JuanVuletich patents.justia.com/inventor/juan-manuel-vuletich</pre> </body> </html>