High-Resolution Analysis of Wind Flow Behavior on Ship Stacks Configuration: A Portuguese Case Study

Atmospheric emissions related to harbor-related activities can significantly contribute air pollution of coastal urban areas and so, could have implications the citizens’ health that live in those areas. Of great concern is local impact are generated while ships at berth, since not all types switch off main engines. This paper intends investigate influence stack configuration for generic cargo on exhaust smoke dispersion, using Port Leixões as a case study series wind tunnel experiments with support Particle Image Velocimetry (PIV) technique. For that, different configurations ship (in terms height, geometry diameter) were simulated under typical conditions area. The PIV results indicate negligible differences between medium long short height presenting strong flow field around stack. only disturbed by stack, but also bridge, both obstacles promoting disturbances creating large wake turbulence effect, which important downwash phenomena. Regarding effects linked two distinct geometries (straight or curved), show straight chimney led higher perturbation when compared curved geometry. presents an increase vorticity, indicating generation more turbulent structures. confirmed velocity inlet conducts vorticity levels, well number Kelvin–Helmholtz measurements point out patterns, northern direction most favorable condition exposure dock workers pollutants. Overall, showed end, length smaller diameter has capability promote behaviors coherent increased pollutant dispersion.