Splats – Visualizing a new Flow Feature

Splats and antisplats are specific flow features were a flow impinges on a immersed wall. They effect the surface stress

And play a major role in heat transfer between fluid and solid wall. On free boundaries or boundaries between two fluids

Like water and air, they are also known as upwelling. We present the first algorithm to detect such structures within the velocity field of fluid flows. Furthermore, we demonstrate the relevance and effectivity of this method by showing results for two turbulent flows simulated by a direct numerical simulation (DNS). These two flows concern a backward facing step and the flow through a turbine cascade.