Advanced Turbulence Modelling and Simulation: Large Eddy Simulation and Direct Numerical Simulation Methods

However, when simulating a turbulent flow there are many possible models which can be employed. The choice of model can affect the quality of the simulated results hugely.



Large Eddy Simulation (LES) becomes increasingly an established scientific computing approach for predicting transitional and turbulent flows. It is used extensively to elucidate the physics of turbulence and to compute flows of industrial relevance, wherever Reynolds-averaged models are not sufficiently accurate and direct numerical simulation techniques are prohibitively expensive. There are a number of different LES methods currently pursued by researchers, which share some similarities with respect to numerical and physical modelling, but also encompass advantages and shortcomings depending on the ‘design’ details.



This course gives a detailed introduction to unsteady turbulent flow physics, with a particular focus on direct numerical simulation (DNS) and LES methods. It discusses the theoretical and numerical approaches, and the best practice to adopt when conducting an LES. Examples are given of LES of industrial problems demonstrating methods of analysis, verification and visualisation.