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--- doc:user:conditions:cond_init [2013/07/12 13:26] – created joris
+++ doc:user:conditions:cond_init [2024/12/09 11:11] (current) – vanhulle
@@ Line 1: / Line 1: @@
+====== Initial conditions ======
+Initial conditions can be prescribed using the ''InitialConditionSet'' object, with a similar syntax to [[doc:user:conditions:displacements]]:
+=== Old Metafor Version < 3545 ===
+   icset = metafor.getInitialConditionSet()
+   icset.define(target, field, ampl)
+   icset.define(target, field, ampl, fctMultiChamps , fieldList)
+=== New Metafor Version >= 3545 ===
+   icset = domain.getInitialConditionSet()
+   icset.define(target, field, ampl)
+   icset.define(target, field, ampl, fctMultiChamps , fieldList)
+where
+|< 100% 8em - - >|
+|''target''          | ''GObject''  | meshed geometric entity where the initial condition is prescribed |
+|''field''           | ''Field1D''       | nodal variable to be prescribed          |
+|''field''           | ''InternalField'' | Gauss-point variable to be prescribed    |
+|''ampl''            | ''float''         | initial value                            |
+|''fctMulti'' {{:doc:user:ico-advanced.png?18|Advanced}}   | ''[[doc:user:general:fonctions|Function]]'' | spatial dependence |
+|''fieldList'' {{:doc:user:ico-advanced.png?18|Advanced}}  |              | list of dependency fields   |
+\\
+__Examples:__ \\
+Initial temperature of 20°C for a volume:
+   icset = metafor.getInitialConditionSet()
+   icset.define(volumeset(1), Field1D(TO,AB), 20.0)
+A space-dependent initial pressure at Gauss points:
+   def pyFct(x, y):
+      p = (2x+y)*1e4
+      return p
+   fctP = PythonMultiParameterFunction(pyFct, 2)
+   icset = metafor.getInitialConditionSet()
+   icset.define(sideset(1), IF_P, 1.0, fctP, FieldList(Field1D(TX,AB), Field1D(TY,AB)))