Altair nanoFluidX™

Particle-based Fluid Dynamics Simulation

What is Altair nanoFluidX?

nanoFluidX is a particle-based hydrodynamics (SPH) simulation tool to predict fluid flow around complex geometries under complicated motion. It can be used, for example, to simulate oiling within conventional high-performance or electric vehicle powertrain systems comprising rotating shafts or gears, and analyze forces and torques on individual components of the system. In addition, sloshing can be predicted in tanks experiencing transient motions.

Conceived and optimized for use on clusters of Graphical Processing Units (GPUs), the software is extremely fast. For such typical gear-train applications, without the need to simplify geometries, the code can run an order of magnitude faster than a Finite-Volume code.

nanoFluidX Overview Video

Why nanoFluidX?


The simplified workflow makes advanced simulation possible by non-CAE experts: Import the geometry, select the elements and generate the particles.


Easy and accurate treatment of high-density ratio multiphase flows, such as analyzing aerated oil supply in critical drivetrain areas or simulating tank sloshing for automotive and aerospace applications.


Significant performance advantage and power savings with GPU computing over more cumbersome CPU counterparts, delivering much faster product development.

Key Features

Simplified Pre-processing

No need for mesh in a classic sense. Import the geometry, select the element, and generate the particles. No more hours of pre-processing and devising a good-enough mesh.

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General Free-surface Flows

Simulate sloshing of oil in powertrain systems, free flowing fluids in an open environment, open or closed tanks under high accelerations and similar phenomena.

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High-density Ratio Multiphase Flows

The Smoothed Particle Hydrodynamics (SPH) method of nanoFluidX enables easy treatment of high-density ratio multiphase flows (e.g. water-air) without additional computational effort.

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Tank Sloshing

Accurate measurement of the forces experienced by the tank or vehicle during drastic acceleration, like braking or sudden lane change, by tank sloshing simulation.

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Rotating Motion

nanoFluidX has implemented options for prescribing different types of motion, therefore simulating rotating gears, crankshafts and connecting rods in powertrain applications comes easy.

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Rigid Body Motion

Besides rotational motion, the nanoFluidX code allows for element trajectories prescribed by an input file. Study the interaction of an arbitrary translationally moving solid and the surrounding fluid.

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