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heat transfer influids
Posted 2015年3月24日 GMT-4 14:53 Fluid & Heat, Heat Transfer & Phase Change, Mesh Version 5.0 4 Replies
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I did an experiment in labaratory, and now try to model it in Comsol. I had an ice "dumbbell", filled with water in gaps (in comsol i use simmetry). Insulation was everywhere, except ice surface. Temperature of ice before experiment was -6 degC, and air temperature at ice surface was the same during the whole experiment. Initial temperature of water was near the freezing point. The aim was to obtain how ice would grow and compare with results from Comsol.
I haven't succeeded with my simulation, I always get the error with 'reaching a singularity'. Could you please have a look?
Daria,
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Regards,
Erlend (COMSOL Norway)
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I don't understand your symetry axis.
Can you draw a sketch of the whole system without symetry?
Julien
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of course
Daria
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Corners give singularities, because two melting surfaces are very close. If you had an ice balls it would be easier!
Play with mesh, timestep, the way dg compute the deformation (laplace, winslow...)
Try to add smoothing velocity under the interface boundary condition.
Try to play with the max time step also. Lot of things to try, the mesh is the most important.
Julien