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2D simulation of a multiphase flow (boolean subtraction problem in DesignModeler)

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Old   November 11, 2018, 22:51
Default 2D simulation of a multiphase flow (boolean subtraction problem in DesignModeler)
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Hi guys, I am new to Fluent and am trying to simulate a 2D open channel as shown: https://imgur.com/a/CHpblzH

I have drawn the 2D sketch as shown: https://imgur.com/a/PgxYmbA

When I created the 3D model in DesignModeler, it was relatively simple, as I just subtracted the inside surfaces from the fluid domain using the boolean functions. How do I do this in 2D?
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