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. 2020 Jul 17;62:102405. doi: 10.1016/j.scs.2020.102405

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Fig. 7 — Simulated results of dimensionless pollutant concentration and PD index in case 2:(a1) distributions of (C/C₀) in Z-plane (Z= −2 m); (a2) distributions of (C/C₀) in Z-plane (Z= +2 m); (b1) distributions of PD in Z-plane (Z= −2 m); (b2) distributions of PD in Z-plane (Z= +2 m).