From a real life reference, I've developed the Explosion with trails Effect.The muzzle flash effect was created based on a real life reference, and it's measurements are realistic and the result is pretty close to the original Video on vimeo: https://vimeo.com/529993053 *The effect is compatible with Houdini 18.5.499
*Thanks to the GPU processing it is possible to obtain an explosion in a few minutes of simulation and with a few tweaks it is possible to obtain a quick result. Actually in the attached file the opencl is deactivated because the resolution has been increased to obtain the maximum detail.
The cache simulation is not included on the uploaded file, as it's 88gb. I'm available for any questions.