[Getdp] generated system is of dim zero

[Thomas.Bock at ptb.de]

Thank you very much for your answers; I haven't known this.

> Hi Thomas,
> 
> the problem is that there are no physical numbers defined in your .geo 
file. 
> GetDP uses those physical numbers in the mesh to identify the regions.
> Please add the following lines to the end of your smallVol_gewinde.geo:
> 
> Cylinder_vol = 100000;  // Arbitrary unique value
> Inner_vol = 100001;    // Arbitrary unique value
> Physical Volume(Cylinder_vol) = {17611};
> Physical Volume(Inner_vol) = {17617};
> 
> reload it in Gmsh and mesh it again.
> Note: By specifying variables (Cylinder_vol, Inner_vol) you get their 
names
> when you choose their visibility via the menu Tools -> Visibility ->
> List Browser
> -> select Physical groups in the lower left of this window.
> 
> In your .pro file you have to use the same physical numbers (not the
> entity numbers):
> Group {
>     cylin_vol   = Region[100000];
>     inner_vol   = Region[100001];
>     start_vol    = Region[{cylin_vol, inner_vol}] ;
> }

I tried this but I still receive the same error; 
do I need to define Physical surfaces too (I don't use Surfaces in my 
*.pro)? 

> 
> Then it works.
> 
> By the way: Instead of the fixed time step size loop you can also 
> use adaptive time
> stepping (adjusts automatically to smaller step sizes when the 
> solution changes quickly and
> to coarser time steps otherwise), which can be more efficient. You 
> can find an example at:
> https://geuz.org/trac/getdp/wiki/TimeLoopAdaptive
Thank you!


> 
> Cheers,
> Michael
> 
> 
> 
> -----Original Message-----
> From: getdp [mailto:getdp-bounces at ace20.montefiore.ulg.ac.be] On 
> Behalf Of Thomas.Bock at ptb.de
> Sent: Monday, January 26, 2015 2:42 PM
> To: getdp at geuz.org
> Subject: [Getdp] generated system is of dim zero
> 
> Hello,
> 
> I tried to calculate the temporal development of a simple looking 
> problem but I get the message "generated system is of dimension zero"
> I can not find the problem. Would be very nice if someone could have a
> look:
> 
> 
> 
> 
> I use version 2.4.5-svn of getdp.
> 
> Thank you very much in advance
> Thomas