השוואת שיטות

	סימולציית זרימה טורבולנטית מנותקת (Detached Eddy Simulation)	הידרודינמיקת חלקיקים מוחלקים
תחום	דינמיקת זורמים	דינמיקת זורמים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1997	1977
הוגה השיטה	Philippe Spalart	Monaghan John & Lucy Leon
סוג	Hybrid turbulence modeling approach	Meshfree particle method
מקור מכונן	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.	Lucy, L. B. (1977). A numerical approach to the testing of the fission hypothesis. The Astronomical Journal, 82(12), 1013-1024.
כינויים	DES, hybrid RANS-LES	SPH, particle hydrodynamics
קשורות	5	5
תקציר	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.	Smoothed Particle Hydrodynamics (SPH) is a meshfree particle method for simulating fluid dynamics, developed independently by Lucy in 1977 and Gingold and Monaghan in 1977. Rather than discretizing on a fixed grid, SPH represents fluids as collections of particles that carry mass, momentum, and energy. Each particle interacts with neighbors within a kernel support radius, enabling natural handling of free surfaces, large deformations, and multiphase flows without remeshing. SPH has become indispensable for simulations involving violent flows, impacts, and complex interfaces.