Re: [Libmesh-users] question about example transient_ex2.C

[Michael P. <mpo...@pu...>]

Thank you.

Couple of more questions:

1. You have p and u variables in your equation. Is this a misprint?

2. It seems there is also a force term. In the example you integrate it 
over a surface. Can I have a volume force, to solve something like this:

(1/c^2) d^2 p / dt^2 - Laplacian(p) + F = 0 ?

3. Where cam I read about the Newmark method of solution, that you have 
implemented?

Thank you again,

Michael.


On 03/04/2019 12:28 PM, John Peterson wrote:
>
>
> On Mon, Mar 4, 2019 at 10:24 AM Michael Povolotskyi 
> <mpo...@pu... <mailto:mpo...@pu...>> wrote:
>
>     Dear Libmesh developers,
>
>     could you, please, tell which equation is solved in the example
>     transient_ex2.C?
>
>
> Looks like some kind of second-order wave equation to me,
>
> (1/c^2) d^2 p / dt^2 - Laplacian(u) = 0
>
> but you should double check the signs that are used by the 
> NewmarkSystem internally...
>
> -- 
> John