Meshing problem --> Thermo failure
I am trying to simulate maximum flow inside a tiny pipe using totalPressure = 106325 Pa boundary and fixedPressure=101325 Pa.
Dimensions of pipe is (0.004 m length and 0.003 mm diameter)
Using a very coarse netgen mesh and about 15000 iterations, a fully converged solution is obtained.
However, when refine the mesh, a solution cannot be obtained due to failure in the thermophyical- or the pressure model.
Anyone having ideas why the refined mesh cannot converge. Pictures are attached, 'fine2' is the fine mesh and 'coarse' is the coarse mesh.
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