Fluid & CFD Simulation

SIMULIA’s Computational Fluid Dynamics (CFD) simulation offerings allow our customers to engineer products ensuring accurate real world performance predictions with fast turnaround speeds. SIMULIA’s Fluids technologies allow customers to solve a vast array of challenges spanning industries and application use cases. eVTOL flight and community noise testing, optimizing race car aerodynamics designs for best performance, or certifying automotive designs for WLTP fuel efficiency regulations are just a few problem areas we can help customers solve.

SIMULIA Fluids Simulation is driven by two complementary technologies that provide customers with scalable fluids simulation to address a broad range of real world applications. PowerFLOW and XFlow offer world class Lattice Boltzmann method (LBM) technology for high fidelity simulations that accurately predict real world performance. Fluid Dynamics Engineer enables multi-scale multi-physical vision by embedding CFD into design, simulation, optimization, data management, and business intelligence applications within the 3DEXPERIENCE platform. In addition, a Plastics Injection Molding application allows validation and optimization of plastic part and mold tooling designs early in the product development process.


SIMULIA Fluids solver technology

Navier-Stokes equations

The physical space to be simulated is divided into many small sub-domains called control volumes or cells. The finite volume method is used to discretize the continuum equations that describe fluid motion, known as the Navier-Stokes equations. The resulting set of algebraic equations is solved iteratively to obtain the pressure, velocity, temperature (and other physical quantities) in each cell for steady or unsteady flows. Additional discretized transport equations can be solved in the same way to represent other physical phenomena like turbulence and chemical species.

Lattice Boltzmann method

Based on a discrete form of the kinetic theory of gases, the Lattice Boltzmann method tracks the microscopic motion of fluid particles through discrete space and time, to simulate the flow of gases and liquids. The fluid space is automatically discretized into cubic voxels, and boundaries into surfels, eliminating the need for conventional surface and volume grid generation. The Very Large Eddy Scale (VLES) turbulence modeling approach ensures that anisotropic fluid structures are captured with high fidelity, which is critical for aerodynamics and aeroacoustics workflows