[Getdp] Help integrating

[Patrick Dular]

Dear Daniel,

For this, you should use GlobalQuantities. Here are your files extended 
for this purpose.

Regards,
Patrick



On 17/01/2010 20:47, Daniel R Morris wrote:
>
> Hello!  What a wonderful tool GetDP is - if only I knew how to use it!
>
> I am trying to solve an electrical conduction problem, a simplified 
> version of which I present here.  I have a conducting bar, with two 
> contacts held at fixed potential.  I have no trouble calculating 
> scalar voltage, E field and current density.  I am struggling, though, 
> with integrating the current density over a cross-section of the bar 
> to measure total current.  I have set up the bar 1cm dia and 10cm 
> long, with half on either side of the X-Z plane.  I can integrate 1 
> over the cross section at the X-Z plane and correctly derive the 
> cross-sectional area of the bar (after correcting with 2pi geometry 
> factor for global quantity inAxiSymmetric problem).  When I try to 
> integrate current, I get 0 as a result - because E field isn't defined 
> on the line element I use as my cross-section cut-plane.  I am not 
> sure how to resolve this - either how to get E field (thus, current) 
> defined on the cut-plane or define the integration differently.  Any 
> help is greatly appreciated - thank you!
>
> Daniel Morris
>

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