XFlow provides a virtual water channel module for free surface simulations. It can be used to analyze the flow around ship hulls, predict their resistance, seakeeping, loads on components, and the downstream wake of both surface and submerged watercraft.

The adaptive refinement algorithm of XFlow can also detect and refine dynamically and automatically the ship wake and the free-surface of the fluid.

For sailing boats, the multiphase solvers of XFlow allows both hydrodynamic analysis on the boat and aerodynamic analysis on the sail to be performed at the same time.

Moving Parts

XFlow can be used to simulate moving parts rigid dynamics behavior, such as boat dynamics with six degrees of freedom, this feature allows the effect of the change of the heave on the roll or yaw angle of the boat or the effect of an increasing inlet flow on the roll angle of the boat to be analyzed dynamically.

XFlow is also well suited to simulate moving parts with enforced behavior such as to carry out boat maneuvers simulations or carrier ships simulations with real rotating propellers or modeled ones.


The solver supports progressive waves boundary conditions by implementing linear and fifth order Stokes theory to simulate a wide range of sea conditions. This is suitable for studying seakeeping of boat hulls, for predicting floating buoy behaviour, or for measuring the impact of the waves on off-shore structures such as oil platforms or bridge pillars. It is also possible to use a porous volume to model the beach and study wave dissipation on the coast.


XFlow multiphase capabilities allow hydrodynamic analysis on the submerged boat region and aerodynamic analysis on the wind exposed region to be performed at the same time. This possibility to simulate both the interaction of the air and water with the boat makes XFlow suitable for sailing applications where both physics are closely related.

Moreover, co-simulations with other structural solvers (through Open FSI and FMI standard) are available in XFlow which even allows inclusion of the sail deformation in this kind of application.

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