XFlow

XFlow and Abaqus co-simulations for advanced Fluid Structure Interaction (FSI) analysis:

• Mutual exchange of information automatically performed by the Co-simulation Engine
• The co-simulation interface region is a surface where the coupling acts.
• XFlow treats the interface region as a solid moving boundary where the no-slip condition must be enforced
• Abaqus requires the external fluid loads acting on the surface of the interface region

CFD and Multibody Dynamic (MBD) co-simulations via Functional Mock-up Interface (FMI) standard:

• FMI is an independent standard to support co-simulation of dynamic models
• Master (Simpack)-Slave (XFlow) configuration with data exchange between subsystems restricted to discrete communication points
• Application: Vehicle control under side-wind effects
  •  XFlow provides Simpack with the aerodynamic forces affecting the bodies
  •  Simpack performs the multi-body simulation and runs the control system

• Integration of Spatial 3D library to support CATIA’s CATPart and CATProduct directly in XFlow
• This Library allows also to support many other native CAD formats
• Reduce requirements for CAD healing and defeaturing operations
• A great step forward in reducing the CAD-to-CFD time

Two features have been implemented in order to allow importing CST STUDIO SUITE data to XFlow:

• External VTK/VTU mesh data can be interpolated and read by XFlow
• A new Volumetric Heat Source condition can now be applied to the entire fluid domain as a user-defined law

These two features allow the user to export to VTK/VTU format the energy scalar field from CST
simulation and use it as Volumetric heat source in XFlow.

• New Volume of Fluid (VoF) multiphase solver to complement the already existing Particle-Based Tracking and Phase field multiphase solvers.
• This VoF solver is more adapted to large scale multiphase applications such as:
  • Tank sloshing
  • Dam break

Simplified approach to FSI analysis where:

• Solid deformation is defined by a sequence of geometries representing a predefined deformation
• The geometry deformation animation drives the fluid flow simulation

• Temperature Jump boundary condition that can be applied through a surface or a volume
• Convection Radiation boundary condition to apply a heat flux resultant from a surrounding
  temperature and a heat flux coefficient
• Volume Heat Source boundary condition, available for porous volumes only, to model radiators and heat exchanger behavior