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Multi-Region Approach

In general, this methodology allows working with any number of regions. This computational model consists of three parts (regions). We consider following regions:


  • rotor is rotational part of the model, fluid is flowing over rotating turbine wheel
  • 2 stators are static parts of the model, fluid is flowing through
    • spiral
    • drafttube
francis turbine spiral geometry openfoam

[spiral (stator)]

francis turbine rotor geometry openfoam
francis turbine drafttube geometry openfoam

[drafttube (stator)]

Figure: Three regions of computational model: spiral; rotor; drafttube;

During simulation, each region is computed individually and each region communicates with other regions through special boundary conditions.