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Re: [ff3d-users] Problems
From: |
Stephane Del Pino |
Subject: |
Re: [ff3d-users] Problems |
Date: |
Wed, 18 Feb 2004 19:13:37 +0100 |
User-agent: |
KMail/1.5.4 |
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Dear Robert.
On Tuesday 17 February 2004 18:45, Robert Li wrote:
> 1. in EmbededFunctions.hpp/cpp
> except for sin , the output message of other template
> function(cos,tan...) is not correct.
> such as when I set boundary "u = cos(z1) on 8;",
> the output message is:
>
> u = sin(boolop) on (8)
I think this is related to the #7545
> 2.Can we save output file to different folder.
> Such as :
> save(medit,".\\output\\test2",M,dos);
Yes, if the directory exists. You can also specify the full path.
> 3.When I set boundary condition on mesh such as
> u = -1 on M zmin;
> u = 1 on M zmax;
> sometimes, the result output data on boundry in
> file(.bb) is not just -1 or 1, but close value
> -0.99998 or 0.99998.
> Could you tell me why?
Their could be 2 reasons:
- - the linear system is solved using Conjugate Gradient so the solution may
not
be exacte. You can try using 'cg(epsilon=1E-6)' for example to change the
required precision...
- - If you use penalty, dirichlet conditions are not exactly imposed.
Best regards,
Stephane.
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