{"id":294199,"date":"2023-07-21T01:47:54","date_gmt":"2023-07-21T01:47:54","guid":{"rendered":"\/forum\/forums\/topic\/surface-laser-heat-source-applied-to-vof-models\/"},"modified":"2023-08-07T12:18:25","modified_gmt":"2023-08-07T12:18:25","slug":"surface-laser-heat-source-applied-to-vof-models","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/surface-laser-heat-source-applied-to-vof-models\/","title":{"rendered":"Surface laser heat source"},"content":{"rendered":"

I’m doing things about laser melting materials, and the models include the gas phase as well as the metal phase. The VOF, melting and solidification models were opened in the FLUENT software, and a surface heat source was used between the two phases, taking into account the shallow depth of the laser action.The model is shown in the figure.<\/p>\n

1.According to the information in the forum, I tried writing UDFs, adding a surface heat source at the two-phase interface (z=0) and including a gradient that causes my heat source not to act on the gas phase , can I set the heat source to act only on the metallic phase, even though I have added the statement (z<=0&&C_VOF(c, sec_th)>0.05 && C_VOF(c, sec_th)<1), but it doesn’t seem to work?<\/p>\n

2.Whenever I calculate a certain time step, it always pops up: Divergence detected in AMG solver: temperature Divergence detected in AMG solver: temperature Error at host: floating point exception<\/p>\n

Any tips or ideas on how to use this in ANSYS Fluent are greatly appreciated, thank you very much!<\/p>\n

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