Fluid–Structure Interaction

Intensifying competition, increasing government regulations and more aggressive cost targets are pushing product designs to the edge of what’s possible, eroding the boundaries between different physical domains. One result is that it often is no longer possible to ignore the interactions between fluids and the structures that surround them. That’s why fluid–structure interaction (FSI) is important. When FSI occurs, fluid flow deforms a physical structure, which in turn changes the fluid flow. This two-way interaction loop continues through multiple cycles, possibly resulting in structural damage and less-than-optimal flow. Traditional fluid flow simulation doesn’t account for this interaction, so simulation results may be incomplete and even misleading. The resulting prototype won’t perform as expected, and an expensive and time-consuming redesign will be necessary.

ANSYS makes it easy to predict the interactions between fluids and structures, enabling engineers to optimize the behavior of complex products with the highest fidelity. Accurate simulation of the fluid–structure interface can enable your engineering team to dive deeper to get a better understanding of your product’s behavior. Interaction with structures is a critical computational fluid dynamics (CFD) app you have to get right.

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Featured functionality: Reduce fatigue failures in thermal management systems

Plastic Cooling Fan

Plastic cooling fans used in automotive thermal management and other applications save cost and weight but are prone fail due to deformation. New ANSYS Fluent-Mechanical system coupling accurately evaluates performance and durability. The structural simulation is performed on a stationary mesh (with Rotational Velocity) applied and the Fluids simulation is performed on a rotating mesh accounting for non-axisymmetry. This new capability also can be applied to other rotating machinery applications as diverse as helicopter rotors.