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Problem with solution
Posted 19.09.2024, 05:46 GMT-4 1 Reply
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HI. i receive the following error11: Failed to find a solution for the initial parameter. Singular matrix.
There are 1 void equations (empty rows in matrix) for the variable comp1.solid.b_rig1. at coordinates: (0,0,0), ... There are 1 void equations (empty rows in matrix) for the variable comp1.solid.c_rig1. at coordinates: (0,0,0), ... There are 1 void equations (empty rows in matrix) for the variable comp1.solid.d_rig1. at coordinates: (0,0,0), ... There are 64589 void equations (empty rows in matrix) for the variable comp1.u2. at coordinates: (-0.741714,-0.509766,0), (-0.759344,-0.507377,0), (-0.741714,-0.509766,0.5), (-0.772365,-0.487326,0), (-0.719307,-0.551944,0), ...
There are 64589 void equations (empty rows in matrix) for the variable comp1.v2. at coordinates: (-0.741714,-0.509766,0), (-0.759344,-0.507377,0), (-0.741714,-0.509766,0.5), (-0.772365,-0.487326,0), (-0.719307,-0.551944,0), ... can someone help me?
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This is an effect of that a domain is not meshed, only its boundary. So degrees of freedom are allocated in nodes on the boundary, but there are no equations defining them.
-------------------Henrik Sönnerlind
COMSOL