Re: [sparta-users] Modelling of moving boundaries

[Steve P. <sj...@gm...>]

sorry, I don't have any special insight on this.
I think you have to solve the geometry problem for the intersection
of a moving triangle and a moving particle.

Steve

On Mon, Jul 29, 2019 at 9:37 AM Анатолий Папулов <ana...@ma...>
wrote:

> Dear Steve,
>
> Thank you very much for your response.
> How hard would it be to code by myself? Are there any tricky moments on
> coding this?
> I understand that it depends on my skills, but probably you have some
> additional materials to get some insights on this.
>
> Best Wishes,
> Anatolii
>
> On 29 Jul 2019, at 17:53, Steve Plimpton <sj...@gm...> wrote:
>
> The current model does as you say (removes particles if the moved surface
> overlaps them).
> It was designed for slowly moving surfaces where the flow will have plenty
> of time
> to requilibrate once the surface moves a small amount.  Doing the model
> you suggest is
> possible.  Namely, model a collision between a moving particle and a
> moving surface and
> reflect the particle off the moving surface.  However it is more
> complicated and would require
> extra coding.  No one has done it yet.
>
> Steve
>
> On Mon, Jul 29, 2019 at 8:50 AM Анатолий Папулов via sparta-users <
> spa...@li...> wrote:
>
>> Hello everyone,
>>
>> I am using SPARTA to simulate free-molecular flow around some 3D
>> geometries. Now, I tried to run the simulations for moving geometries
>> (rotation around one axis) and observed the change in the flow due to this
>> interaction. I found that a fraction of the particles was deleted (by
>> overlapped surface) and the rest were reemitted with the thermal velocity
>> of the surface.
>> Is it possible to simulate the interaction of particles with moving parts
>> without being removed in SPARTA? I think the task is pretty close to the
>> simulation of the turbopump.
>>
>> Thank you
>>
>> - Anatolii
>>
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>
>