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conservation of energy in multibody boltzmann simulation #12

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guoci opened this issue Sep 8, 2023 · 1 comment
Open

conservation of energy in multibody boltzmann simulation #12

guoci opened this issue Sep 8, 2023 · 1 comment

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@guoci
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guoci commented Sep 8, 2023

I printed out the sum of squares of velocities in the simulation and observed the total energy varies over time.
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https://github.com/lukepolson/youtube_channel/blob/main/Python%20GPU/multibody_boltzmann.ipynb
@guoci
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guoci commented Sep 19, 2023 •
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I have figured out the reason. at each iteration of the simulation, a particle can have multiple collisions. This results in the velocities being updated incorrectly. I modified the code to allow for only one collision for a particle and resolved the issue.
Code at: guoci@5db3e7c
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@guoci