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 6-167: Properties for Study Settings.
Property
Value
Default
Description
tlist
Numeric vector
 
Time list.
usertol
on | off
off
Physics-controlled or user-defined tolerance.
rtol
Positive scalar
0.01
Relative tolerance, if usertol is on.
tunit
String
s
Time unit.
Table 6-168: 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 6-169: Properties for Physics and Variables Selection.
Property
Value
Default
Description
activate
String Map
 
See Physics and Variables Selection.
activateCoupling
String Map
 
See Physics and Variables Selection.
activaterom
String Map
 
See Physics and Variables Selection.
disabledcommon
Reference Array
 
See Physics and Variables Selection.
disabledcoordinatesystems
Reference Array
 
See Physics and Variables Selection.
disabledcoupling
Reference Array
 
See Physics and Variables Selection.
disabledpair
Reference Array
 
See Physics and Variables Selection.
disabledphysics
Reference Array
 
See Physics and Variables Selection.
disabledreduced
Reference Array
 
See Physics and Variables Selection.
disabledvariables
Reference Array
 
See Physics and Variables Selection.
disableFrameControl
Reference Array
 
See Physics and Variables Selection.
discretization
String Map
 
See Physics and Variables Selection.
equationform
String Map
 
See Physics and Variables Selection.
equationform_freq
String Map
 
See Physics and Variables Selection.
equationform_freq_src
String Map
 
See Physics and Variables Selection.
reconstructors
String Map
 
See Physics and Variables Selection.
useadvanceddisable
on | off
off
See Physics and Variables Selection.
Table 6-170: 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.
outputInterface
The interfaces to use as key
 
An output property for the physics interfaces in the output. It can be used as keys while setting the outputmap and outputselectionmap.
outputmap
String Map
 
See Store in Output for possible options and defaults (this property corresponds to the Output column). Possible values are physics, all, none, or selection.
outputselectionmap
String Map
 
A semicolon-separated string array of the output selections (specified with tags).
solnum
auto | first | last | interp | manual | positive integer
auto
Solution selection of initial values for variables solved for.
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.
See setEntry() for information about setting the values for a property that uses a String Map. If you use the set(pname,value) method, you have to provide all alternating property name and property value pairs.
Table 6-171: 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 6-172: Properties for Study Extensions.
Property
Value
Default
Description
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.
Table 6-173: Properties for Time-Dependent Mesh Adaptation.
Property
Value
Default
Description
adapgeom
String
 
Adaptation in geometry.
adapsolnum
Array of integers>0
1
Indices.
adaptselection
selection
all()
The selection for the adaptation (the default is the entire geometry). See Selections.
timeadaption
on | off
off
Adaptive mesh refinement.