This work proposes an expanded 3D Euler model for calculating the spatiotemporal evolution of pollutant concentrations released into the atmosphere under changing meteorological conditions. The model, alongside the advection-diffusion equation, combines in a single system: Stokes’ law deposition (for solid particles), temperature-dependent chemical decomposition according to Arrhenius’ law, retention by plants (passive sink), precipitation washout (rainout), terrain-dependent resistance, and parameterization of turbulent diffusion based on Pasquill-Gifford stability classes. The numerical solution employs upwind/QUICK convective fluxes, central difference diffusion, and a time step stabilized by the CFL criterion. Scenarios covering various wind directions and speeds demonstrate the role of terrain in flow direction and atmospheric-related dispersion characteristics. The model is mass-balanced.
| Mualliflar | Ravshanov, N., Juraboeva, O., Boborakhimov, B., Sharipov, Kh., Равшанов, Н., Журабоева, О., Боборахимов, Б., Шарипов, Х. |
|---|---|
| Jurnal | Ҳисоблаш ва амалий математика муаммолари |
| Nashr sanasi | 2025-09-20 |
| Son | 4 |
| Betlar | 38-46 |
| Til | Rus |
| DOI | 10.71310/pcam.4_68.2025.01 |
DOI: 10.71310/pcam.4_68.2025.01 · Maqolaning asl sahifasi
advection-diffusion, Pasquill-Gifford, Monin-Obukhov length, wet deposition, sedimentation (Stokes), vegetation sinks, terrain, Upwind/QUICK, CFL, адвекция-диффузия, Паскуилл-Гиффорд, длина Монина-Обухова, влажная эрозия, оседание (Стокс), растительные стоки, рельеф, Upwind/QUICK, CFL
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