It is available for 3D models as well as 2D planar stress models (2D planar strain models are not considered), however, 2D axisymmetric and axisymmetric swirl are supported only by the Linear Elasticity model.

Non-isothermal effects are not included in the solid body—that is, thermal dilatation is omitted.

Solid properties (Young's modulus and Poisson's ratio) must be constant.

Only linear interpolation functions are used.

Polyhedral elements are not supported. Only tetrahedral, hexahedral, wedges, and pyramid elements can be used for 3D cases, and only triangular and quadrilateral elements can be used for 2D cases.

The default explicit mesh updating used for two-way FSI simulations is unstable under certain conditions (such as when the fluid and solid densities are comparable or when large deformations are considered). In such situations, implicit dynamic mesh update is recommended.

The linear elasticity model assumes that the stress loading does not exceed the yield strength of the solid material.