### 11.1.1. ANSYS Multifield Coupling Settings

Most analyses will require no coupling to another solver and Option can remain set to the default of `None`. If you are setting up a two-way fluid-structure analysis, coupling CFX-Solver to ANSYS solver, then you need to set Option to either `ANSYS MultiField` or `ANSYS MultiField via Prep7`. Use `ANSYS MultiField` if you want to do a full ANSYS Multi-field set-up, or `ANSYS MultiField via Prep7` if you want to do a minimal set-up in CFX-Pre and define the ANSYS Multi-field set-up in the ANSYS Prep7 user interface. A full description of these two modes of operation can be found in Overview of Preprocessing for ANSYS Multi-field Simulations in the CFX-Solver Modeling Guide.

If `ANSYS MultiField` is selected, then additional information must be specified. The ANSYS Input File setting is described in Input File Specification for the Mechanical Application in the CFX-Solver Modeling Guide, and the Coupling Time Control settings are described in Coupling Time Control in the CFX-Solver Modeling Guide.

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