[Getdp] Mass Flow Simulation

Tammo.Heeren at AlconLabs.com Tammo.Heeren at AlconLabs.com
Tue Mar 4 22:56:12 CET 2008

I am answering my own question.
It turns out that the plugin is to blame.
After I changed the Jacobian-type from SurAxi to Sur, and VolAxi to Vol
the numbers turn out as I expected.
Thanks anyways for the example.


> -----Original Message-----
> From: getdp-bounces at geuz.org [mailto:getdp-bounces at geuz.org] 
> On Behalf Of Tammo.Heeren at AlconLabs.com
> Sent: Monday, March 03, 2008 3:19 PM
> To: getdp at geuz.org
> Subject: Re: [Getdp] Mass Flow Simulation
> Bernhard,
> > Have you had a look at our wiki example (username: getdp, password:
> > wiki): 
> > http://geuz.org/getdp/wiki/Avalanche2d
> > 
> > There the flow velocity is derived from a scalar potential.
> The wiki example has been very helpful, as pretty much all of 
> you examples.
> I have one problem with Avalanche2d. Maybe it is my limited 
> understanding.
> If I set the parameter alpha = 0 I would expect the total 
> number of electrons to stay constant.
> Is this a correct assumption?
> However, when I run the example and use the 'integrate' 
> plugin to integrate n for the entire domain, I get a number 
> that is decreasing with time. The integrate plugin might not 
> be the correct choice, as it it probably does not take into 
> account the cylindrical geometry of the domain.
> Tammo

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