Research Article
Anisotropic Characteristics of Turbulence Dissipation in Swirling Flow: A Direct Numerical Simulation Study
Table 1
Typical real values of variables used in the numerical simulation.
| Scales of the flow domain (mm) | 20 * 10 * 10 | Scale of jet diameter (mm) | 1.0 | Grids number | 512 * 256 * 256 | Scale of resolution (m) | 39 | Mean inlet axial velocity (m/s) | 71.71 | Fluid density (kg/m3) | 1.29 | Fluid viscosity (Pa⋅s) | 1.85 * 10−5 | Inflow momentum thickness (/d) | 1/20 | Reynolds number Re | 5000 | Swirl number S | Case 1: 0.28; | Case 2: 0.45; | Case 3: 0.59; | Time step | 0.001 | Number of simulation step | 20000 |
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