Community Computational Fluid Dynamics AutoMesh 3D mesh generation failed. Could not create fillet geometry...

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3D mesh generation failed. Could not create fillet geometry. No blend surfaces created.

Hans Hager

Hi,

I am trying to mesh a full annulus in AutoGrid5 by taking the mesh of one passage and then duplicating it to get a full meshed turbine stator annulus. Now the Fillet mesh works for one passage (O4H topology with Butterfly fillet geometry; Method:from meridional; structured mesh; highly staggered; matching periodicity).

Unfortunately I get the following error message:

Somewhere along the way on the annulus, the fillets cannot be generated anymore.

What could the reason be?

Regards,

Hans

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  • 0

    Hi Hans,

    I am not sure know how you are proceeding with the case. I think you do not need to use the duplicate option for the multiple blades. But instead use the option of "number of mesh passages" in the row properties and regenerate the 3D mesh. You should be able to get a mesh with blade fillets on each blade. Duplicate option is used when you have multiple blades within the same row. You can have a look at documentation (user Guide/ Blade Editing/ Duplicate Blade Geometry)

    Regards,
    Manthan

  • 0 in reply to ms1007

    Hi Manthan,

    sorry, it wasn't clear. I am using multiple Blades within ine row.

    Regards,

    Hans

  • +1 in reply to Hans Hager

    Hi Hans, 

    Please allow me to explain better to be able to help you.
    I am not sure what is the computation case you are dealing with. But, it is generally unusual to have 12 blades in the same row. You have the error "Could not create fillet for blade 12". If you meant to simulate a full stator of turbine, instead of using the multiple blades in a single row you should use only single blade in a row and use the option " number of mesh passage" to 12. It will automatically duplicate with 12 blades in a 360 degree view. 

    Usually Multiple blades in a single row option is used when you have splitters within the blade row or if you have an aircraft engine configurations, where it is interesting to mesh the stator upstream the nozzle arms with staggered angle varying with the azimuthal location of the blade.




    If you have exact same blades as in the case of normal stator of turbine, you should use single blade in a passage with a periodicity equal to the number of blades, and you will be able to generate the mesh with blade fillets on each blade. 

    I hope I am clear now, let me know if you have further queries. 

    Regards,
    Manthan

Reply
  • +1 in reply to Hans Hager

    Hi Hans, 

    Please allow me to explain better to be able to help you.
    I am not sure what is the computation case you are dealing with. But, it is generally unusual to have 12 blades in the same row. You have the error "Could not create fillet for blade 12". If you meant to simulate a full stator of turbine, instead of using the multiple blades in a single row you should use only single blade in a row and use the option " number of mesh passage" to 12. It will automatically duplicate with 12 blades in a 360 degree view. 

    Usually Multiple blades in a single row option is used when you have splitters within the blade row or if you have an aircraft engine configurations, where it is interesting to mesh the stator upstream the nozzle arms with staggered angle varying with the azimuthal location of the blade.




    If you have exact same blades as in the case of normal stator of turbine, you should use single blade in a passage with a periodicity equal to the number of blades, and you will be able to generate the mesh with blade fillets on each blade. 

    I hope I am clear now, let me know if you have further queries. 

    Regards,
    Manthan

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