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Error message: Failed to find consistent initial values. Singular matrix.
Posted 2011年11月2日 GMT-4 09:04 Fluid & Heat, Geometry, Mesh Version 4.0 2 Replies
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hey peeps
I keep receiving this error message:
============== error message ==============
Failed to find consistent initial values.
Singular matrix
There are 19924 void equations (empty rows in matrix) for the variable mod1.p dl
at coordinates: (405321,5.86245e+006,-4243), (405321,5.86281e+006,-4098), (405321,5.86256e+006,-4193.33), (405321,5.86281e+006,-4243), (405321,5.86271e+006,-4148.67), ...
and similarly for the degrees of freedom (empty columns in matrix)
=========== end of error message ============
I went throught all relecant discussions in the forum but to no avail.
I have four 2D Bézier polygons (rectangles) and two 3D Bézier polygons (tubes) integrated within the 3D (extruded) block. I assigned Darcy's Law (Darcy's Law Material Model and Storage Material Model, (maybe) fracture flow and mass flux as well).
Meshing goes well - disable Darcy's Law, the simulation went well with good postprocessed GUI of mesh size and mesh quality.
Anything I might have missed out?
many thanks in advance!!!!!!!!!!!!!
regards
Liwah
I keep receiving this error message:
============== error message ==============
Failed to find consistent initial values.
Singular matrix
There are 19924 void equations (empty rows in matrix) for the variable mod1.p dl
at coordinates: (405321,5.86245e+006,-4243), (405321,5.86281e+006,-4098), (405321,5.86256e+006,-4193.33), (405321,5.86281e+006,-4243), (405321,5.86271e+006,-4148.67), ...
and similarly for the degrees of freedom (empty columns in matrix)
=========== end of error message ============
I went throught all relecant discussions in the forum but to no avail.
I have four 2D Bézier polygons (rectangles) and two 3D Bézier polygons (tubes) integrated within the 3D (extruded) block. I assigned Darcy's Law (Darcy's Law Material Model and Storage Material Model, (maybe) fracture flow and mass flux as well).
Meshing goes well - disable Darcy's Law, the simulation went well with good postprocessed GUI of mesh size and mesh quality.
Anything I might have missed out?
many thanks in advance!!!!!!!!!!!!!
regards
Liwah
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2 Replies Last Post 2011年11月2日 GMT-4 11:29
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Posted:
1 decade ago
Hi
For me it sounds like you are missing a boundary conditions, your ODE are not enough defined, check if all physics have consistent BC's
--
Good luck
Ivar
For me it sounds like you are missing a boundary conditions, your ODE are not enough defined, check if all physics have consistent BC's
--
Good luck
Ivar
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Posted:
1 decade ago
Hi Ivar
many thanks!
yet, I did define BC for all geometries i.e. Storage Material Model for each of them, but to no avail.
you talked about 'consistent BC', how to make sure a consistency? I mean, anywhere to check that?
again, many thanks for your time!!
regards
Liwah
many thanks!
yet, I did define BC for all geometries i.e. Storage Material Model for each of them, but to no avail.
you talked about 'consistent BC', how to make sure a consistency? I mean, anywhere to check that?
again, many thanks for your time!!
regards
Liwah