(Difference between revisions)
|−|Posietive and/or negative face pressure are added using a '''condition''' called ''Face3D'', for displacement as unknown, or ''FaceVel3D'', for velocity as unknown. |+|
are using ,
|−|This '''condition''' uses two variables called ''NEGATIVE_FACE_PRESSURE '' and ''POSITIVE_FACE_PRESSURE '' to read assigned pressure values on the nodes of the condition and |+|
|−|therefore it is necessaey to add them as varibles in the python file. |+|
Face3D'' and '' FaceVel3D'' ,as linear triangular conditin, could be fined in '' custom_conditions'' of '' structural application''. |+|
variables NEGATIVE_FACE_PRESSURE and POSITIVE_FACE_PRESSURE
on the nodes.
'''''' '''''' ''''
Latest revision as of 08:57, 3 May 2012
Neumann boundary condition are applied using following conditions in KRATOS,
FACE2D(3D) or FACEPRESSURE2D(3D) in STRUCTURAL application
Fluid3DNeumann or Monolithic2DNeumann(and 3D) in INCOMPRESSIBLE application.
All of them take external pressures, through variables like, EXTERNAL_PRESSURE, PRESSURE,NEGATIVE_FACE_PRESSURE and POSITIVE_FACE_PRESSURE, and then
compute the NORMAL and apply the calculated forces on the nodes.
Fluid3DNeumann is written to work with Fractional step solvers while Monolithic2DNeumann is written to work with mixed u-p systems.
The reader is supposed to have a look on these conditions and choose the one tha tis more appropriate to his/her needs.