Time Dependent

A Time Dependent study step is intended for simulations where field variables vary over time and you can use a time-dependent solver.

Syntax

model.study(stdname).create(fname, "Transient");

model.study(stdname).feature(fname).set(pname,value);

Description

Study step.

The following properties are available.

Table 6-128: Properties for Study Settings

Property	Value	Default	Description
tlist	Numeric vector		Time list.
rtol	Positive scalar	0.01	Relative tolerance.
tunit	String	s	Time unit.

Table 6-129: Properties for Plot Results While Solving

Property	Value	Default	Description
plot	on | off	off	Plot while solving.
plotgroup	String	default	Plot group to use for plot while solving.
probefreq	pout | psteps	pout	Where to update probes.
probes	Vector of strings		Probes to use when probesel=manual.
probesel	all | none | manual	all	Probes to compute.
plotfreq	tout | tsteps	tout	Where to update plot.

Table 6-130: Properties for Physics and Variables Selection

Property	Value	Default	Description
activate	Vector of strings		Choose physics interfaces to solve for. The length of the vector is two times the number of physics interfaces. For example, with two physics interfaces, g and c: new String[]{"g", "on", "c", "off"}.
disabledcoupling	Vector of strings		Disabled coupling features
disabledphysics	Vector of strings		Disabled physics interfaces.
disabledvariables	Vector of strings		Disabled variables.
discretization	Vector of strings		Select discretizations for physics interfaces. The length of the vector is two times the number of physics interfaces. For example, with two physics interfaces, g and c: new String[]{"g", "disc1", "c", "disc2"}.
useadvanceddisable	on | off	off	Modify physics tree and variables for study step.

Table 6-131: Properties for Values of Dependent Variables

Property	Value	Default	Description
initmethod	init | sol	init	Method for initial values for variables solved for.
initstudy	String		Reference to study or "zero" for zero solution.
manualsolnum	Vector of integers	[1]	Index to solution for initial value for variables solved for.
notlistsolnum	Vector of integers	[1]	Indices to selected solutions for values for variables not solved for.
notmanualsolnum	Vector of integers	[1]	Indices to solutions for values for variables not solved for.
notsolmethod	init | sol	init	Method for values for variables not solved for.
notsolnum	auto | all | first | last | from_list | interp | manual | positive integer	auto	Solution selection for values for variables not solved for.
notstudy	String		Reference to study or "zero" for zero solution.
nott	String		Specify time for interpolated solution of values for variables not solved for.
solnum	auto | first | last | interp | manual | positive integer	auto	Solution selection of initial values for variables solved for.
storesel	Vector of strings		Selections defining which field data to store.
t	String		Specify time for interpolated solution of initial value for variables solved for.
useinitsol	on | off	off	User-controlled initial values for variables solved for.
usesol	on | off	off	User-controlled values for variables not solved for.
usestoresel	all | selection	all	Store fields in output.

Table 6-132: Property for Mesh selection

Property	Value	Default	Description
mesh	Vector of strings		Select meshes for geometries. The length of the vector is two times the number of geometries. Example value when two geometries geom1 and geom2 are available is: new String[]{"geom1","mesh1","geom2", "mesh2"}.

Table 6-133: Properties for Study Extensions

Property	Value	Default	Description
adapgeom	String		Name of geometry to use.
adaption	on | off	off	Adaptive mesh refinement.
autoremesh	on | off	off	Automatic remeshing.
autoremeshgeom	String		Name of geometry to use.
plistarr	Real matrix		List of parameter values. One row of values per parameter name.
pname	Vector of strings		Parameter names.
punit	Vector of strings		Parameter units.
sweeptype	filled | sparse	sparse	Sweep type: a filled or a sparse sweep.
useparam	on | off	off	Auxiliary sweep.