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Rainwater Management

News from AVL’s Virtual Vehicle Development

One of the important aspects of the vehicle development process is rainwater management. While it still heavily relies on tests involving a physical prototype on a testbed, e.g. a rain chamber, conventional mesh-based Computational Fluid Dynamics (CFD) methods are practically inapplicable. This is because they cannot handle full-scale water management applications and do not necessarily deliver reliable results within reasonable time frames.

Smoothed particle hydrodynamics (SPH) as a meshless approach has inherent advantages in modeling highly dynamic, liquid dominated flows featuring large computational domains and simulated physical times. PreonLab is a SPH-based software that offers an efficient and reliable solution to water management problems. It allows for full geometric complexity, with the turnaround times between one and two orders of magnitude smaller compared to conventional mesh-based methods.

A unique user experience, distinctively efficient solver performance and market-leading visualization capabilities enable efficient frontloading and provide insights for rapid optimization of water management before a first physical prototype is available. Virtual testing facilitates the reliable prediction and tracking of water paths from the car surface to complex enclosures. Powerful visualizations and virtual wetting sensors can be readily employed for detailed insights into water ingression for any component of the vehicle. This helps unveiling any potential risks at an early stage of the vehicle development process while opening a wider design space.

Our customers who have the virtual rainwater management solution already successfully established in their development processes, benefit from substantially reduced physical prototyping. It helps them to improve the product quality and avoid expensive late stage modifications, thus decreasing development costs and time to market.