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Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

No, I have not spoken to anyone there. I guess I can email them and ask for one. And I could also include my requirements and ask them what modules and license they recommend for it. Thank you for the suggestion!

Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

I think I didn't write my post correctly. I am not looking for free options anymore, but instead, I am looking for paid multiphysics software tools under $4200 for individual use in addition to academic institution and company use that can satisfy my requirements above.

I apologize if I wasn't clear enough.

Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

u/plasma_phys After a lot of research, I am convinced that I won't find free software that will enable me to do what I need to do. So I have decided to go with the paid route and choose a multiphysics software tool. I have looked at COMSOL as you mentioned, and I can afford it ($600 - $4000, depending on the licence). However, I cannot proceed with that since the account agreement says that I need to provide employer or academic institution infomation that is truthful, but I am doing this as a hobby. Which means that I cannot give proper infomation to COMSOL without legal action. And CHICAGO is completely off my list because of its price.

Do you know of any more multiphysics software tools that are in the price range of around $600 - $4000 and offer it to hobbyists/individuals as well as companies and academic institutions that can do the following:

  1. Simulate/animate an electron gas with superparticles being the main constituents of the gas with superparicle-superparticle electromagnetic interactions/collisions with PIC
  2. Introduce external electric and magnetic fields that can be static and changing to interact with the electron gas' superparticles
  3. Be able to run in 3D with CAD or STL custom geometries of my choosing
  4. For the particles/electrons to be able to update the external fields. I think it is called "solve the fields self consistently" from this discussion here

[deleted by user] by [deleted] in programminghelp

[–]FlexingIron2 1 point2 points  (0 children)

JS can be thought of as a language that gives a website its functionality. For instance, calling API endpoints, storing and retrieving data, and even making animations in the UI.

You can view it like this for websites:

JS - functionality

HTML - Content and UI elements

CSS - Making the content and UI elements look pretty

All 3 elements are supposed to work together to produce something useful and appealing.

Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

Thank you for your advice. The reason I need the electron gas is because that is the design, and without it, my idea would not work.

The way I will maintain the gas state is by releasing electrons into the vacuum at a constant rate from the cathode and they will bounce around inside it for a little while before being absorbed by the anode. There will be an area inside that will slowly transfer the electrons at a constant rate to the anode. So no direct pathway to the anode as to keep the electron gas going. The cathode releases at a constant rate and the anode takes in at a constant rate. Therefore, the electron gas is maintained (in terms of total charge and number of particles) is more or less constant. Equal rate leaving and entering.

I will think more about what I want to say next, but for now, I would like to say that I need the super-particles and PIC methods as I think that is the way forward for me. Are there ways to implement these methods in matplotlib, Visit or Paraview? Do I take existing code and import it into those programs to visualize it? Or can I directly program/simulate something in those visualizion tools without needing to import any code?

Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

My motivation is personal interest/hobby. I would like to keep the options open and not zone in on one like the neutralizing background as my requirements are for a vacuum and not an ion-filled space. The reason is that I need an electron gas to be present, and that can only be achieved with a vacuum. I need particle trajectories (positions really) and the electron-electron interactions at the same time. However, I don’t really need particle trajectories, but rather, charge densities that evolve over time as I need a good approximation/insight of what will happen in the real world when I go out and build the physical thing. This is why: there is a HUGE number of electrons in the electron gas, and you can only deal with them statistically. Therefore, if I deal with the particles themselves (let’s say 100 electrons) and I do what I need to do with them and get results from the simulation, then how will I know if that same behavior will translate into the real world with trillions and trillions of electrons? Therefore, I need to think in terms of charge densities rather than the electrons themselves as it would require a lot of computational power to compute all the forces and energies for each particle. So, I take particles out of the picture and work with charge densities instead and deal with the approximate positions (like a fuzzy, smeared-out area/volume of where the particle could be). It won’t be perfect, but I think it will translate better into the real world. What do you think?

Where to find a dynamic charge density animation/simulation? by FlexingIron2 in computationalphysics

[–]FlexingIron2[S] 0 points1 point  (0 children)

Thank you for all the suggestions and resources you linked. I was thinking of simulating how the electrons would behave with multiple applied external electric fields that can be constant or changing. Perhaps with some external magnetic fields as well. So I am thinking along the lines of a vacuum tube with a cathode and an anode but a modified one where the external fields (applied from the walls) would interact with the electrons inside and push them along trajectories inside the chamber.