Learning Forum

[pradyumna.k9900]

I'm trying to do flow analysis on the rotor with the tip clearance at the shroud. when I use no-slip wall it says memory allocated not sufficient, when I use counter-rotating wall it shows following error. I have done the meshing in turbogrid.

 ERROR #002100080 has occurred in subroutine CHECK_NORMV.           |

 | Message:                                                           |

 | The specified velocity vector on the boundary patch                |

 |                                                                    |

 |  R1 Shroud                                                         |

 |                                                                    |

 | has a significant normal component at one or more faces. One of    |

 | these face locations is                                            |

 |                                                                    |

 |  (x,y,z) = ( 4.98395E-01, 4.00300E-02, 4.99807E-02).               |

 |                                                                    |

 | The angle between the specified velocity and the element surface is|

 |   28.521 degrees at this face. This is considered an error because |

 | it implies that the mesh is moving.  The following are possible    |

 | reasons for the error message:                                     |

 | 1. There is a setup error; for example, an incorrect axis of       |

 |    rotation.                                                       |

 | 2. There may be a meshing problem; for example, the nodes on a     |

 |    rotating surface might not lie on the surface of revolution.    |

 | 3. The boundary is curved and the mesh is very coarse. In this     |

 |    case, you may modify the tolerance by increasing the            |

 |    expert parameter 'tangential vector tolerance wall'             |

 |    from its default of 20 degrees.