Fluids

Fluids

Flow field error after overset grid initialization

    • shangjialin
      Subscriber

      Transient computation.The relative motion of the foreground grid and background grid is specified by udf. When t=0, the foreground grid and background grid are relatively stationary.However, after initialization, there is wrong vorticity at the junction of foreground grid and background grid.How to remove these vorticity?

    • Rob
      Ansys Employee

      How did you initialise the model?  Check the model for orphan cells too: I suspect you've got several given the relative cell sizes. 

    • shangjialin
      Subscriber

      I just clicked the initialization button. So Initialization method is default, based on cell volume. In addition, Fluent did not indicate the discovery of  orphan cells.

    • Rob
      Ansys Employee

      So you used hybrid initialisation? Try from the tree and select "from boundary".  How does the velocity field look?

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