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 **3D**EXPERIENCE 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

## Computational Fluid Dynamics Software Applications

### Aerodynamics

Aerodynamic simulation models the flow of air around objects such as vehicles and aircraft, without the time and cost of wind tunnel testing. Understanding aerodynamics allows engineers to optimize stability and lift while minimizing drag in order to improve performance and fuel efficiency.

### Aeroacoustics

The flow of air over surfaces generates noise, which is an unwanted nuisance in aircraft, cars, fans, wind turbines and other mechanisms. Aeroacoustic simulation calculates the expected noise spectrum, identifies sources, and helps engineers to reduce unwanted noise.

### Lubrication

Lubrication of mechanical components is a complex multiphase problem involving an arbitrary number of moving geometries and narrow spaces. Physical testing is complex and expensive - simulation enables design optimization to ensure efficient performance and long-term reliability.

## SIMULIA Fluids & CFD Simulation Software Solutions

**Fluid Simulation on 3DEXPERIENCE Platform**

On the 3DEXPERIENCE platform, fluid simulation methods can be defined, stored, replayed, and maintained allowing customers to develop and centralize on their own best-practices to increase quality, reliability, and efficiency.

**3DEXPERIENCE Works Fluid Dynamics**

3DEXPERIENCE Works Simulation gives novices and experts alike the power to perform complex computational fluid dynamics analyses to validate product designs and make better-informed product decisions faster.

#### PowerFLOW

PowerFLOW is used to accurately and efficiently perform aerodynamic, aeroacoustics and thermal management simulations with highest fidelity on fully complex model geometry.

#### XFlow

XFlow offers multiphase and moving parts modeling capabilities specially focused on lubrication workflows such as gearboxes and electric motor drives.

**SIMULIA Cloud**

SIMULIA Cloud™ provides secure, web-based access to SIMULIA PowerFLOW®, a multi-user system that enables engineers to easily and intuitively manage simulation projects, to collaborate seamlessly with colleagues, and use powerful simulation or results analysis tools with just a web browser.