[yt-users] adding gradient of gravitational potential and calculating gravitational acceleration

[Nathan Goldbaum]

On Wednesday, June 22, 2016, tazkera haque <h.tazkera at gmail.com> wrote:

> Hi people,
>
> I have a physics question which comes from adding the gradient of
> gravitational potential. I want to use [image: g = -\nabla \phi] , where [image:
> \phi] stands for grav. potential.
>
> I see in yt cookbook they add gradient to grav. potential
>
>  *ds = yt.load("~/path to folder")*
> * grad_fields = ds.add_gradient_fields(("gas","gravitational_potential"))*
>
>  now if I want to calculate the "g", do I just add
>
>
> *dd= ds.all_data()*
>
> * g_x = - dd["gravitational_potential_gradient_x"] *
>
> *I was wondering if that last line does stand for [image: g_{x} =
> -\nabla_{x} \phi] *
>

Yes, that's right.


>
> *thanks*
> *Tazkera*
>
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