Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Přímá numerická simulace× | Smoothed Particle Hydrodynamics× | |
|---|---|---|
| Obor | Dynamika tekutin | Dynamika tekutin |
| Rodina | Process / pipeline | Process / pipeline |
| Rok vzniku≠ | 1971 | 1977 |
| Tvůrce≠ | Steven Orszag | Monaghan John & Lucy Leon |
| Typ≠ | Full-scale turbulence resolution method | Meshfree particle method |
| Původní zdroj≠ | Orszag, S. A. (1971). Numerical simulation of incompressible flows within simple boundaries: accuracy. Journal of Fluid Mechanics, 49(1), 75-112. DOI ↗ | Lucy, L. B. (1977). A numerical approach to the testing of the fission hypothesis. The Astronomical Journal, 82(12), 1013-1024. DOI ↗ |
| Další názvy | DNS, resolved turbulence simulation | SPH, particle hydrodynamics |
| Příbuzné | 5 | 5 |
| Shrnutí≠ | Direct Numerical Simulation (DNS) is a computational approach that solves the Navier-Stokes equations without turbulence models, resolving all scales of motion from the largest energy-containing eddies down to the smallest dissipative scales (Kolmogorov microscales). Pioneered by Steven Orszag in 1971, DNS provides complete information about turbulent flow fields and serves as a reference solution for validating turbulence models. However, extreme computational demands limit DNS to relatively simple geometries and low to moderate Reynolds numbers. | 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. |
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