ECPMixerGgiFvMesh2D

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1 Mesh setup

The mesh was generated with ICEM-HEXA and exported in the Fluent mesh format. The mesh is generated in two parts: impeller and diffuser, which can be seen in Figure 1.

Ercoftac pump.png

Figure 1: rotor mesh (in blue) and stator mesh (in red)

This 2D mesh has 93886 hexahedra cells.

To learn more about doing a 2D simulation, see HowTo: 2D simulations


2 Running the case

This case is computed using the GGI interface between the impeller and the diffuser.

Follow these steps to run the case from scratch:

First make sure that you have the following installed:

  • A recent revision of OpenFOAM-1.5-dev
  • libOpenFOAMTurbo.so (needed for the inlet boundary condition)
  • the solver turbDyMFoam compiled
  • The boundary condition turboWallFixedValue compiled
  • libsimpleFunctionObjects.so (or comment out the trackDictionaryContent function from ECPMixerGgiFvMesh2D/system/controlDict)
  • libsampling.so (or comment out the ggiCheck function from ECPMixerGgiFvMesh2D/system/controlDict)
cd $FOAM_RUN/ercoftacCentrifugalPump/cases/turbDyMFoam/ECPMixerGgiFvMesh2D
./Allrun >& log_Allrun&

3 Post-processing the case

This presently requires that you have run that case so that you have the following time directories:
0.295711
0.296513
0.298118
0.298921
0.299322
0.299723

The post-processing is automized, and can be executed by doing:

cd $FOAM_RUN/ercoftacCentrifugalPump/cases/turbDyMFoam/ECPMixerGgiFvMesh2D/postProcessing
./Allrun >& log_Allrun&

Likewise, if needed, the post-processing can be cleaned up by doing

 cd $FOAM_RUN/ercoftacCentrifugalPump/cases/turbDyMFoam/ECPMixerGgiFvMesh2D/postProcessing
./Allclean

This deletes all the data that have been calculated from the post-processing, so be sure that you do not want to save anything from the previous calculation before cleaning up the post-processing.

4 Results

4.1 General results

Movie showing unsteady results: Media:2D_U_p.gif

U color new.jpg

Figure 2: Velocity magnitude of the turbDyMFoam/ECPMixerGgiFvMesh2D test case

P color new.jpg

Figure 3: Static pressure of the turbDyMFoam/ECPMixerGgiFvMesh2D test case

4.2 Comparison with the experimental data

Wr 126 backward linearUpwind.png

Figure 5: Comparison with the experimental data for the relative radial velocity (Experimental results taken from Ubaldi 1998 [2])

Wu 126 backward linearUpwind.png

Figure 6: Comparison with the experimental data for the relative tangential velocity (Experimental results taken from Ubaldi 1998 [2])

Cp 0 backward linearUpwind.png

Figure 7: Comparison with the experimental data for the static pressure coefficient (Experimental results taken from Ubaldi 1998 [2])

Cp map 2 backward color.png

Figure 8: Comparison with the experimental data for the static pressure coefficient for different radius (Experimental results taken from Ubaldi 1998 [2])


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