Direct and Iterative FSI Coupling

The reciprocating compressor is a typical problem that is efficiently solved in 2-D using Direct FSI Coupling. This is because the Direct Coupling solution time is less than half the Iterative FSI coupling solution time. However, in 3-D the problem becomes much larger and is more efficiently solved using Iterative FSI Coupling due to memory and speed considerations.

The 2-D and 3-D solutions are shown below. Details of this model can be found here.

2-D Direct Coupling Solution

3-D Iterative Coupling Solution

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