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doc:user:remeshing:remeshing [2016/06/13 17:33]
joris [Options]
doc:user:remeshing:remeshing [2018/05/04 15:47] (current)
boman ↷ Links adapted because of a move operation
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 Second, [[doc/user/meshtransfer/datatransferbetweenmeshes|data must be transferred]] from the old to the new mesh. As you very well know, the Gauss points contains information about strains and stresses, and the nodes about displacements, velocities and temperatures. However, just after remeshing, the newly defined nodes and Gauss points do not know anything, since they were just created ! If we do not want to loose what was computed during the previous time integration, then data (stresses, temperatures, velocities...) must be transferred to the new mesh. Second, [[doc/user/meshtransfer/datatransferbetweenmeshes|data must be transferred]] from the old to the new mesh. As you very well know, the Gauss points contains information about strains and stresses, and the nodes about displacements, velocities and temperatures. However, just after remeshing, the newly defined nodes and Gauss points do not know anything, since they were just created ! If we do not want to loose what was computed during the previous time integration, then data (stresses, temperatures, velocities...) must be transferred to the new mesh.
  
-Once this is done (it used to take a bloody hell of a f***ing time, but now the time required is more reasonable, see [[commit:01_19]] for details), we have a good new mesh, containing data from the previous computation. From this, the simulation can be restarted, which means that the time integration is carried out further, until the remeshing criterion is met again and another remeshing operation takes place.+Once this is done (it used to take a bloody hell of a f***ing time, but now the time required is more reasonable, see [[commit:2016:01_19]] for details), we have a good new mesh, containing data from the previous computation. From this, the simulation can be restarted, which means that the time integration is carried out further, until the remeshing criterion is met again and another remeshing operation takes place.
  
 And that's it for the basics ! But as they say, a picture is worth a thousand words, and I guess that a video is worth a thousand pictures, so just enjoy the following video, about the modelling of forging, to see how it works : And that's it for the basics ! But as they say, a picture is worth a thousand words, and I guess that a video is worth a thousand pictures, so just enjoy the following video, about the modelling of forging, to see how it works :
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 Finally, the tolerance can also be changed. The parameter $\alpha$, used to ponder the unbalanced forces, starts at 1 and is progressively divided by 2 when a step fails. Once $\alpha$ becomes smaller than the tolerance, the algo stops itself, returns an error, and the temporal integrationdoes not restart. The default value of 0.001 can be changed if needed.  Finally, the tolerance can also be changed. The parameter $\alpha$, used to ponder the unbalanced forces, starts at 1 and is progressively divided by 2 when a step fails. Once $\alpha$ becomes smaller than the tolerance, the algo stops itself, returns an error, and the temporal integrationdoes not restart. The default value of 0.001 can be changed if needed. 
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 + --- //[[pjoris@ulg.ac.be|Pierre Joris]] 2016/06/13 //
doc/user/remeshing/remeshing.1465831987.txt.gz · Last modified: 2016/06/13 17:33 by joris