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Problem with moving mesh
Posted 22 giu 2016, 05:11 GMT-4 Fluid & Heat, Mesh Version 4.4, Version 5.2 2 Replies
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I'm trying to build a 2d-axis model of laser heating process, which will melt the powder bed.
The free-surface will deform according to the surface tension and mass loss due to vaporization. Here I use the ALE moving mesh to account the free-surface deformation. I set the boundary condition so that the mesh displacement happens on the boundary at the top. And the axis boundary on the left side only has displacement in z-direction.
But I encounter a strange problem of mesh deformation. As shown in the figure, the mesh will cross the axis boundary. A series of strange mesh deformation happened. However, I have set the mesh displacement of the axis boundary to zero at r-direction. Sometimes, this kind of mesh deformation also happens on the boundary of the right side, whose mesh displacement is also zero in r-direction.
I have no idea how this problem happens.
I'm sure all the domain, boundary conditions are propre.
Have this kind of problem happened to you in ALE moving mesh modeling.
Thank you for your response.
Chaoyue CHEN
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Hello Beyond Chan
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how did you implement surface tension in your model?
Best regards
Marcel
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The surface tension term can be added in the Fluid-Fluid Interface, or the External Fluid Interface according to your model.