Table 2 Overview on the simulation parameters before and after unit conversion
From: Ejection of marine microplastics by raindrops: a computational and experimental study
SI-units | LBM units | |
|---|---|---|
drop diameter d | 1−7mm | 46.4 |
impact velocity u | \(4.50-9.55 \frac {\mathrm {m}}{{s}}\) | 0.05 (fixed) |
impact angle α | 0∘−40∘ | 0∘−40∘ |
simulation box dimensions Lx,Ly,Lz | 10d,10d,8.5d | 464, 464, 394 (fixed) |
pool height h | 4d | 185.6 |
kinematic shear viscosity ν | \(1.0508\cdot 10^{-6} \frac {\mathrm {m}^{2}}{\mathrm {s}}\) | 5.417·10−4(1mm)−3.647·10−5(7mm) |
water density ρ | \(1024.8103 \frac {\text {kg}}{\mathrm {m}^{3}}\) | 1 (fixed) |
surface tension σ | \(7.381\cdot 10^{-2} \frac {\text {kg}}{\mathrm {s}^{2}}\) | 4.126·10−4(1mm)−1.309·10−5 (7mm) |
gravitational acceleration g | \(9.81 \frac {\mathrm {m}}{\mathrm {s}^{2}}\) | 2.610·10−8(1mm)−4.057·10−8(7mm) |
(hydrodynamic) particle diameter dp | ≾22−151μm | ≈0.6−1.0 (fixed) |
number of particles Np | 2000−686000 | 2000−686000 |