Applying boundary conditions with a script is very similar to assigning boundary conditions through the user interface. The same inputs are required--selection mode, boundary condition type, value, and units, as well as selected entity:
// Apply boundary conditions.
log.write("Applying boundary conditions...");
a.selectionMode = "Surface";
a.selectionBasis = "Direct";
// Inlet
bc = new BoundaryCondition("Normal Velocity");
bc.value = 250;
bc.units = "in/s";
A line-by-line description of this is given:
>>>A comment followed by a line written to the console:
// Apply boundary conditions.
log.write("Applying boundary conditions...");
>>>sets the selection mode to surface:
a.selectionMode = "Surface";
>>>sets direct selection of entities:
a.selectionBasis = "Direct";
>>>creates a boundarycondition object called bc that will apply a normal velocity condition:
bc = new BoundaryCondition("Normal Velocity");
>>>The value of the velocity condition is 250. Note that the bc object is modfied:
bc.value = 250;
>>>The units are inches per second:
bc.units = "in/s";
>>>Select surface with ID 9 (knowledge of surface ID’s is required):
a.select(9);
>>>assign the boundary condition defined as the bc boundarycondition object:
a.applyBoundaryCondition(bc);
An alternative method is to use the BoundaryCondition class method called setValue:
bc = new BoundaryCondition("Pressure");
bc.setValue(0, “psi”);
a.select(15);
a.applyBoundaryCondition(bc);