AutoRemesh

Iteratively and automatically create deformed geometries and remesh these geometries. In each step, map the solution and restart the simulation.

Syntax

model.sol(sname).feature(tname).create(fname,"AutoRemesh")

model.sol(sname).feature(tname).feature(fname).set(pname,pvalue)

Description

Operation feature. The following property/values are accepted:

Table 6-26: Valid Property/value Pairs
Property	Value	Default	Description
autoremeshgeom	String		Name of geometry sequence
consistentremesh	on \| off	off	Consistent initialization after remesh
initialstepremesh	positive scalar	0.001	Initial time step size after remesh
initialstepremeshactive	on \| off	off	Use initialstepremesh
solutionremesh	tout \| tstep	tstep	Solution to use for remeshing
stopcondtype	quality \| distortion \| general	quality	Type of condition for remeshing
stopdistexpr	String		Distortion expression
stopdistval	String	2	Maximum distortion allowed
stopexpr	String		Mesh quality expression
stopgenexpr	String		Logical condition for remeshing
stopval	String	0.2	Minimal mesh quality

The automatic remeshing solver works in one geometry at a time. You specify the name of the geometry sequence in the property autoremeshgeom. Automatic remeshing is available for Time-Dependent studies and is intended for use with the Moving Mesh and Deformed Geometry interfaces.

Use the stopcondtype property to select the type of condition for when remeshing should occur:

•

quality. This means that the solver remeshes when the value of stopexpr becomes smaller than the value of stopval.

•

distortion. This means that the solver remeshes when the value of stopdistexpr becomes larger than the value of stopdistval.

•

general. This means that the solver remeshes when the stopgenexpr property becomes true (nonzero).

The solutionremesh property determines which previous solution is used for the remeshing:

•

tout means that remeshing is done on the last solution that would have been stored by the solver if remeshing would not have occurred. This setting discards any solver progress done since the last output.

•

tstep means that the remeshing is done using the solution from the last solver step before the condition for remeshing became fulfilled. Only the very last solver step, at which the condition was triggered, is discarded. Typically this setting is preferred because then the progress of the automatic remeshing does not depend on the solver’s list of output times.

After each remeshing the time integration is restarted and you can control the time stepping by the Time type analogous properties consistentremesh and initialstepremesh.

If the time integrator runs into problems the computation is restarted at the beginning of the previous time interval using stricter time stepping controls.