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<p>This study performs computational modeling of air pollution and dispersion around the isolated cubic model of a building with different barrier heights. A system of Reynolds averaged Navier–Stokes (RANS) equation was applied to solve the problem, and different turbulent models have been used to close the equations. To validate the system of equation and numerical algorithm, the test problem has been solved numerically. The received computational data were matched with measurement results and computational data of other authors. The main problem specifying the pollutant release process behind an obstacle with a barrier was solved after validation the system of equations and the numerical algorithm. For modeling, the Re-Normalisation Group <i>k</i> – <i>ε</i> (RNG <i>k</i> – <i>ε</i>) turbulence model was used. It was determined that by using solid barriers height of 0.1D, the pollution reduces 1.5 times compared to case without the barriers. The received results can be used in the construction of protective barriers near the carriageways for maximum protection of residential buildings. Since building a barrier with the optimal height to protect nearby residential buildings can save a lot of funds.</p>

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Numerical study of near-field pollutant dispersion with different traffic gases

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Alibek Issakhov,
  • Aizhan Abylkassymova,
  • Zhanyl Bekzhigitova

摘要

This study performs computational modeling of air pollution and dispersion around the isolated cubic model of a building with different barrier heights. A system of Reynolds averaged Navier–Stokes (RANS) equation was applied to solve the problem, and different turbulent models have been used to close the equations. To validate the system of equation and numerical algorithm, the test problem has been solved numerically. The received computational data were matched with measurement results and computational data of other authors. The main problem specifying the pollutant release process behind an obstacle with a barrier was solved after validation the system of equations and the numerical algorithm. For modeling, the Re-Normalisation Group k – ε (RNG k – ε) turbulence model was used. It was determined that by using solid barriers height of 0.1D, the pollution reduces 1.5 times compared to case without the barriers. The received results can be used in the construction of protective barriers near the carriageways for maximum protection of residential buildings. Since building a barrier with the optimal height to protect nearby residential buildings can save a lot of funds.