In a one-way transfer FSI analysis, the CFD analysis results (forces, pressures, temperatures, convection loads, or heat flows) at the fluid-structure interface are transferred to the Mechanical model and applied as loads. The subsequently calculated displacements or temperatures at the interface are not transferred back to the CFD analysis. One-way transfer is appropriate when displacements and temperatures differentials calculated in the Mechanical application are not large enough to have a significant effect on the fluid analysis.
There are four supported applications of a one-way FSI analysis:
Based on the setting of the Interpolation Type property:
(default): Pressure results from a CFD analysis are input as normal pressure in a structural analysis at the fluid-structure interface.
: Pressure results from a CFD analysis are input as applied forces in a structural analysis at the fluid-structure interface.
Temperature results from a heat transfer CFD analysis are input as body loads in a structural or LS-DYNA analyses to determine the thermally induced displacement and stresses (thermal-stress analysis).
Convections from a heat transfer CFD analysis are input as convection boundary conditions (film coefficients and bulk temperatures) in a thermal analysis at the fluid-structure interface.
Temperatures or heat flows from a heat transfer CFD analysis are input as temperature or heat flow boundary conditions in a thermal analysis at the fluid-structure interface.
There are two methods available for performing a one-way FSI analysis: importing loads and System Coupling. See Using Imported Loads for One-Way FSI and One-Way FSI Transfers Using System Coupling in Workbench, respectively.