Módszerek összehasonlítása

	Leválasztott örvény szimuláció	Nagy Eddy Szimuláció
Tudományterület	Áramlástan	Áramlástan
Módszercsalád	Process / pipeline	Process / pipeline
Keletkezés éve	1997	1963
Megalkotó	Philippe Spalart	Joseph Smagorinsky
Típus	Hybrid turbulence modeling approach	Scale-resolving turbulence simulation
Alapmű	Spalart, P. R., Jou, W. H., Strelets, M., & Allmaras, S. R. (1997). Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach. Advances in DNS/LES, 1, 4-8.	Smagorinsky, J. (1963). General circulation experiments with the primitive equations: I. The basic experiment. Monthly Weather Review, 91(3), 99-164.
Alternatív nevek	DES, hybrid RANS-LES	LES, subgrid-scale modeling
Kapcsolódó	5	5
Összefoglaló	Detached Eddy Simulation (DES) is a hybrid turbulence modeling approach introduced by Spalart in 1997 that combines the computational efficiency of RANS in attached boundary layers with the accuracy of LES in separated wake regions. By automatically switching between RANS and LES based on local grid spacing and turbulence length scales, DES provides superior predictions for flows with large separations, shear layers, and vortex shedding at a cost between pure RANS and pure LES. DES has become the standard method for complex aerospace applications involving separation and transient phenomena.	Large Eddy Simulation (LES) is a turbulence modeling technique that explicitly resolves large-scale turbulent eddies while modeling small-scale subgrid-scale (SGS) motions. Introduced by Joseph Smagorinsky in 1963, LES represents a middle ground between Reynolds-Averaged Navier-Stokes (RANS) and Direct Numerical Simulation (DNS). By capturing the energy-containing scales of turbulence, LES provides superior accuracy for transient flows and complex geometries at computational costs significantly lower than DNS.