Sammenlign metoder
Gjennomgå de valgte metodene side om side; rader som avviker, er uthevet.
| Gitter-Boltzmann-metoden× | Direkte numerisk simulering× | |
|---|---|---|
| Fagfelt | Fluiddynamikk | Fluiddynamikk |
| Familie | Process / pipeline | Process / pipeline |
| Opprinnelsesår≠ | 1988 | 1971 |
| Opphavsperson≠ | Gianluigi Zanetti | Steven Orszag |
| Type≠ | Kinetic theory-based simulation method | Full-scale turbulence resolution method |
| Opprinnelig kilde≠ | McNamara, G. R., & Zanetti, G. (1988). Use of the Boltzmann equation to simulate lattice-gas automata. Physical Review Letters, 61(20), 2332-2335. DOI ↗ | Orszag, S. A. (1971). Numerical simulation of incompressible flows within simple boundaries: accuracy. Journal of Fluid Mechanics, 49(1), 75-112. DOI ↗ |
| Alias | LBM, lattice gas automata | DNS, resolved turbulence simulation |
| Relaterte | 5 | 5 |
| Sammendrag≠ | The Lattice Boltzmann Method (LBM) is a kinetic theory-based computational approach to fluid dynamics that discretizes the Boltzmann equation on a lattice grid. Developed by McNamara and Zanetti in 1988, LBM computes fluid behavior by tracking the distribution of particle velocities at discrete lattice nodes rather than solving the Navier-Stokes equations directly. This method naturally incorporates complex physics (turbulence, multiphase flows, porous media) and is highly parallelizable, making it increasingly popular for modern computational platforms. | 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. |
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