Difference between revisions of "FEM ElementFluid1D"

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==Use== <!--T:3-->
==Use== <!--T:3-->
#Click on [[Image:FEM ConstraintContact.png|32px]] or choose {{KEY| FEM}}  →  {{KEY|[[Image:FEM ConstraintContact.png|32px]] Constraint contact}}  from the top menu.
#Click on [[Image:FEM FEM_ElementFluid1D.png |32px]] or choose {{KEY| FEM}}  →  {{KEY|[[Image:FEM FEM_ElementFluid1D.png |32px]] Fluid section for 1D flow}}  from the top menu.
#Select the master face.
#Select Fluid type: Liquid, Gas or Open Channel
#Select the slave face.
#Select Section type: Pipe Manning, Pipe Inlet etc.
#Enter a contact stiffness.
#Enter Section type parameters.
#Enter a friction coefficient.
#Select and add edge.
==Limitations== <!--T:4-->
==Limitations== <!--T:4-->

Revision as of 07:36, 26 June 2017

FEM ConstraintContact.svg FEM ConstraintContact

Menu location
FEM → Constraint contact
Default shortcut
Introduced in version
See also
FEM tutorial


Creates a FEM fluid section element for aerodynamic and hydraulic networks


  1. Click on 32px or choose FEM32px Fluid section for 1D flow from the top menu.
  2. Select Fluid type: Liquid, Gas or Open Channel
  3. Select Section type: Pipe Manning, Pipe Inlet etc.
  4. Enter Section type parameters.
  5. Select and add edge.


  1. The contact constraint can only be applied to two faces.


  1. The contact stiffness should be 10 times the young's modulus of the material for hard contact. The higher the value for contact stiffness, the harder the contact between surfaces.
  2. The slave face is the face which penetrates into the master face, and therefore experiences more deformation.
  3. The *CONTACT PAIR card is used for modeling contact in CalculiX. The constraint uses Face-to-Face penalty contact and the contact formulation is explained in detail at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node112.html
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