[ff3d-users] Improving precision for boundary conditions.
From:
Juzar Thingna
Subject:
[ff3d-users] Improving precision for boundary conditions.
Date:
Thu, 12 Aug 2010 18:01:57 +0800
Hello Everyone, I'm trying to solve the modified Helmholtz equation. I need my boundary conditions to be accurate to atleast 6 decimal places. In the verbose printed by ff3d at the time of running I notice that ff3d takes the precision of the boundary conditions as only 3 decimal places. In the input file I have provided this value accurate till 6 decimal places. Is there some way I can improve on the significant digits ff3d takes as input?
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========================= == Text mode execution == ========================= FreeFEM3D computing thread: started Parsing data Parsing data: done Building Scene ... done Parsing POVRay file: "domain.pov"
- the scene is composed of 2 object(s) Parsing POVRay file: done Building Mesh ... done Building Domain ... Domain is: inside((0,0,0)) Reference translation (POV-Ray -> FEM) (0, 0, 0) -> 1
Done Done Computing degrees of freedom positions... - number of degrees of freedom positions: 1250000 Computing degrees of freedom positions: done Solving Problem:
Unknowns: [u:undefined]
Problem: pde(u): div(L*grad(u)) - 1*u = 0 dnu(u) = 0.016 on 3 u = 0 on 2 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Regards,
Juzar Thingna Department of Physics, Center for Computation Science and Engineering, National University of Singapore.