Validation of a Lagrangian particle model

In this paper a custom-developed model of dispersion of pollutants is presented. The proposed approach is based on both a Lagrangian particle model and an urban-scale diagnostic model of the air velocity field. Both models constitute a part of an operational air quality assessment system. The proposed model is validated by comparing its computed results with the results of measurements obtained in a wind tunnel reflecting conditions of the Mock Urban Setting Test (MUST) experiment. Commonly used measures of errors and model concordance are employed and the results obtained are additionally compared with those obtained by other authors for CFD and non-CFD class models. The obtained results indicate that the validity of the model presented in this paper is acceptable.

► The Lagrangian particle model is validated by being compared with the results of the experiment. ► The model is connected to a diagnostic air velocity field model. ► The results of the MUST experiment are used to be compared with the calculations. ► A new solution of particle reflection from the land surface is applied. ► Results of the calculations and measurements are in acceptable correspondence.