Flow field error after overset grid initialization

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  • Last Post 28 August 2019
shangjialin posted this 28 August 2019

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?

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rwoolhou posted this 28 August 2019

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 posted this 28 August 2019

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.

rwoolhou posted this 28 August 2019

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

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