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Dynamic mesh and boundary layer

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Old   March 21, 2011, 18:14
Unhappy Dynamic mesh and boundary layer
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hi all,

i'm simulating an impeller using dynamic mesh. My problem is that if i use boundary layer mesh (prismal mesh) around the blades after few time step i get "negative cell volume". What can i do? I'd like to avoid enclosing blades in a zone apart

thanks for your help
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