Dear Ansys Community,
Hi everyone, i am quite new with fluent and I am simulating a solidification process now, during which a phase change material(liquid phase at the beginning) is cooled down and solidificate. I used the solidification and melting model and the density and the conductivity of phase change material were defined by UDF(changes with different temperature). The geometry and meshing can be seen in the pics. In which i used triangular mesh and set the size of the mesh to 4 mm.The whole model is about 1 meter long and 15cm wide.
The walls around the geomety were set to a certain temperature as boundary condition. And i chose the step size of 0.1s and started the simulation. At first it seemed to be right but after about 400 steps. The error occuers like shown in the pic(Error: floating point exception).
I tried that with adaptive step size it would not lead to divergence but the step size is then always far too small than i need.
Can anyone help me or give me some suggestions ?