Editing Computational fluid dynamics (section)

====Large eddy simulation====
{{main|Large eddy simulation}}

[[Image:LESPremixedFlame.jpg|thumb|right|250px|Volume rendering of a non-premixed swirl flame as simulated by LES]]
[[Large eddy simulation]] (LES) is a technique in which the smallest scales of the flow are removed through a filtering operation, and their effect modeled using subgrid scale models.  This allows the largest and most important scales of the turbulence to be resolved, while greatly reducing the computational cost incurred by the smallest scales. This method requires greater computational resources than RANS methods, but is far cheaper than DNS.