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Old   July 6, 2011, 08:36
Default defining dynamic mesh
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Alex Poyser
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when defining a dynamic mesh do i need to mesh the dynamic and the static part seperately and then assemble the two parts in fluent?
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Old   July 6, 2011, 10:25
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Adrien Lemoine
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Hi,

you don't have to mesh it separetly but you have to assign different names to the fluid zones and boundary conditions.

Adrien
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Old   July 6, 2011, 12:08
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So for example a archimedes screw turning in a chamber with a small clearence must be defined with two seperate boundary conditions and then the die at the end of the screw needs to be defined seperately again? I tried using the moving frames of reference like you suggested but apparantly this is not useful when there is a clearence around the archimedes screw.

The clearence allows for clay to move backwards and form a seal within the extruder, which apparantly is another reason why the moving frame of reference won't give me the correct results.
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Old   July 6, 2011, 15:24
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Adrien Lemoine
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Hi,
can you draw a picture because i don't really get what you mean
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Old   July 7, 2011, 04:10
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Like this only I only have to model the barrel around the archimedes screw and the die. The screw is the rotating zone and the small gap around the screw is a clearence the die is also not rotating.

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