XFlow

High fidelity CFD based on Lattice-Boltzmann Method

Aerodynamics with Moving Parts

XFlow is able to compute aerodynamic loads over complex geometry, including the effect of rotating wheels and moving parts. It is possible to analyze overtaking or dynamic systems such as the vehicle suspension through a co-simulation with external Multibody Dynamics Simulation software, such as Simpack. The virtual wind tunnel module of XFlow includes a moving ground option and enables users to setup simulations in record time.

Internal Flow

Under hood aerodynamic flows or internal air circulation inside the car cabin can be easily simulated using XFlow through a straightforward workflow. The particle-based approach avoids the time-consuming traditional meshing process. Moreover, the particle-based method of XFlow allows under hood analysis with many complex, arbitrary moving geometries and porous media to be performed, skipping the long meshing process usually required to prepare such simulations.

Water Management

The Free-surface solver of XFlow allows water management analysis to be performed, such as flow inside the rain chamber, refueling process, tank sloshing or a drive through of a complete vehicle with real rotating wheels. The adaptive refinement of XFlow dynamically refines water splashing areas while saving elements on other more stable regions, reducing overall simulation time.

Powertrain

XFlow is used by leading powertrain manufacturers for lubrication applications, mass flow distribution through rotating shafts and gear torque prediction thanks to its multiphase solvers that accurately solve the interaction between any two immiscible fluids.

The particle-based approach of XFlow allows the traditional mesh issues faced in the powertrain complex fluid domains to be avoided, such as perfect contact between moving gears or heavy defeaturing of real geometry . XFlow easily handles perfect contacts between real moving gears without any simplification and any specific preliminary preparation. In addition, the FMI standard is implemented in XFlow which allows co-simulations with any external CAE software, such as Multibody Dynamics, FEA, or Optimization applications that supports this standard to be run.