| Autor: |
Daisuke OSHIMA, Michihisa TSUTAHARA, Satoshi MIZUTANI |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Journal of Fluid Science and Technology, Vol 2, Iss 3, Pp 582-591 (2007) |
| Druh dokumentu: |
article |
| ISSN: |
1880-5558 |
| DOI: |
10.1299/jfst.2.582 |
| Popis: |
Three-dimensional homogeneous isotropic turbulence is simulated using the finite difference lattice Boltzmann method (FDLBM). First, we analyze the characteristics of numerical viscosity of FDLBM, and present a method in which the numerical viscosity coincides with that of the Navier-Stokes based FDM. Second, we conducted simulations with the Smagorinsky model. In the energy spectrum E(k) one detects the inertial range E(k) ∼k-5/3; however, the large k range presents a persistent energy “tail,” which has also been found in direct simulations using conventional lattice Boltzmann scheme. This energy “tail” is is due to generation of non-physical longitudinal noise. However, for high Reynolds number flows this noise is shown to be negligible. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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