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Previous: Working with the test Up: Test case: Cavity Next: Notes on editing files

This is an automatically generated documentation by LaTeX2HTML utility. In case of any issue, please, contact us at info@cfdsupport.com.

Working with files

  • Syntax of configuration files is C++
  • Comments: // ignores rest of the line, /* text */ ignores any text across the file
  • No columns
  • White spaces do not matter
  • Empty lines do not matter
  • If something is written wrong, OpenFOAM often offers alternatives

 

Subsections

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Next: Clip out radius Up: Input parameters Previous: Input parameters   Contents   Index

Clip out radius

For best results, the rotor region should be donut-shaped, i.e., there should be a hole running through its centre. Only for such shapes the slice contour is well defined. If there is no hole in the middle, this option allows specifying a positive radius of a hole to drill before applying the filter.

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Next: zeroGradient Boundary Condition Up: Outlet Boundary Conditions Previous: outletVent Boundary Condition   Contents   Index

Zero Gradient Family of Outlet Boundary Conditions

From mathematical point of view, zero gradient value boundary conditions are Neumann boundary conditions.

At the outlet, for all the quantities (except pressure) the typical choice is zeroGradient based boundary condition.

Subsections

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Previous: Speedlines Up: TCFD – GUI Setup Next: Boundary condition: Inlet
This is an automatically generated documentation by LaTeX2HTML utility. In case of any issue, please, contact us at info@cfdsupport.com.

Turbulence

Currently there are several turbulence models supported by TCFDSource:
  • the laminar model (i.e. no turbulence) ,
  • $ k-\omega$ SST model (default),
  • $ k-\epsilon$ model,
  • realizable $ k-\epsilon$,
  • RNG $ k-\epsilon$,
  • Spalart-Allmaras (RANS variant) and
  • Spalart-Allmaras DDES (implies use of Spalart-Allmaras RANS in stationary calculation and Spalart-Allmaras DDES in the transient one)
One of the models has to be selected in the section “Turbulence” and if the advanced parameters are enabled, the user can also tune parameters of the chosen turbulence model. The default values of the model parameters are shown in the figure [*]. Independently of the turbulence model the user can also require different wall functions: Standard wall functions, Low-Reynolds wall functions and Rough walls, which will be applied on all walls in the case.

Figure: Plugin TCFDSource – speedline settings.

cfd processor TCFDSource turbulence settings kOmegaSST
cfd processor TCFDSource turbulence settings kEpsilon
Figure: Plugin TCFDSource – turbulence settings: $ k-\omega$ SST and $ k-\epsilon$ models.
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Previous: Speedlines Up: TCFD – GUI Setup Next: Boundary condition: Inlet

OpenFOAM Training by CFD Support,   CFD SUPPORT,   info@cfdsupport.com    +420 212 243 883      © CFD support, s.r.o., Sokolovská 270/201, 190 00 Praha 9, Czech Republic