Re: turbulent driving in phantom
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Daniel Price
Jun 26, 2019, 4:20:35 AM6/26/19
to Clare Dobbs, Phantom users
Hi Clare,
The main thing is that periodic gravity is not implemented - somebody would need to do this, and I have no particular desire to do so, e.g. using Ewald sums or FFTs.
The code doesn’t die because the sphere-in-box setup uses periodic boundaries + gravity, but the gravity across the boundaries is not implemented, so effectively the gravity boundary is a free boundary rather than periodic.
Best wishes,
Daniel
> On 24 May 2019, at 7:25 am, Clare Dobbs <xxx> wrote:
>
> Hi Daniel,
>
> I have been running some tests with the setup_turb setup in phantom, and I wondered whether it worked with self gravity? I compiled and ran it with gravity set to yes (and G=1), but it didn’t seem to make any difference to the default setup - perhaps I just need to increase the resolution and / or mass?
>
> Thanks,
>
> Clare
The main thing is that periodic gravity is not implemented - somebody would need to do this, and I have no particular desire to do so, e.g. using Ewald sums or FFTs.
The code doesn’t die because the sphere-in-box setup uses periodic boundaries + gravity, but the gravity across the boundaries is not implemented, so effectively the gravity boundary is a free boundary rather than periodic.
Best wishes,
Daniel
> On 24 May 2019, at 7:25 am, Clare Dobbs <xxx> wrote:
>
> Hi Daniel,
>
> I have been running some tests with the setup_turb setup in phantom, and I wondered whether it worked with self gravity? I compiled and ran it with gravity set to yes (and G=1), but it didn’t seem to make any difference to the default setup - perhaps I just need to increase the resolution and / or mass?
>
> Thanks,
>
> Clare
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