ENGYS has published the first installment of its HELYX and ELEMENTS Validation Series, which examines the use of its open-source CFD software, HELYX, for modeling real-world airflow and pollutant dispersion. The study focuses on urban pollutant dispersion, an area relevant to public safety, environmental assessment, and regulatory planning.
To validate the simulation approach, the study uses the Architectural Institute of Japan’s Test Case M, based on wind tunnel experiments conducted at Tokyo Polytechnic University. The scenario features a dense building cluster on elevated terrain with a ground-level ethylene gas release, simulated using Large Eddy Simulation (LES) and compared against experimental measurements.
The findings illustrate how CFD can support the assessment of pollutant transport and concentration patterns in urban environments, helping engineers, planners, and authorities make more informed decisions related to air quality and environmental safety.
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