Large-Eddy Simulation, Explained Without Equations
· 1 min read
Turbulence is full of swirls, from the size of a building down to fractions of a millimetre. Simulating every one of them is called direct numerical simulation, and it is usually far too expensive.
The big idea
Large-eddy simulation computes the big swirls directly and models the small ones. Big eddies carry most of the energy and depend on the geometry; small eddies are more universal, so a simple model often does a decent job.
Where it struggles
Near walls, even the “big” eddies become tiny. That is why wall models — the topic of my current research — matter so much.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.