[Getdp] Integration over time ?
Christophe Geuzaine
cag32 at case.edu
Sat May 13 23:23:26 CEST 2006
Thomas Jung wrote:
> Hi,
>
> sorry for bothering again ...
>
> In time domain, I have the magnetic vector potential, and a scalar electric
> potential. I want to compute the time-averaged Lorentz-force 1/T * int (jxB),
> i.e. integrate the cross-product of current and magnetic induction over one
> period. For each time step, I can compute the force as
>
> Cross[ - sigma[]*(Dt[{a}]+{d v}), {d a} ]
>
> a=magnetic vector potential, v = electric scalar potential
>
> If possible, I would not do that as a post processing, as I would need to
> store every time step then, and are going towards large models.
>
> Could I perhaps somehow declare a vector field F, and compute and sum up the
> values inside the time loop? Maybe using "Evaluate" ?
>
> Was not able to figure that out, thank you very much for any hint !
>
There's no easy way to integrate in time with the current
post-processing syntax: the best solution is thus probably to save the
time evolution in a file and use another tool to perform the integration
afterwards.
>
>
> Thomas Jung
> _______________________________________________
> getdp mailing list
> getdp at geuz.org
> http://www.geuz.org/mailman/listinfo/getdp
>
--
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine
More information about the getdp
mailing list