Dispersion of Pollutants in a Turbulent Urban Atmosphere


Air pollution levels in urban environments become increasingly problematic with rising energy consumption and urbanization. Effective measures to control air quality depend on reliable predictions of pollution concentration levels in the urban boundary layers. While mean concentrations can be predicted with reasonable accuracy for some simple cases, hazardous situations require prediction of peak concentrations. These depend on the details of the instantaneous turbulent flow, which are not appropriately captured in current dispersion models. Also, model studies mainly address average conditions, whereas air pollution becomes a direct threat to public health under extreme weather conditions and in the case of sudden localized releases, such as accidents, natural disasters and acts of terrorism. The current project is proposed in order to study in more detail the problem of dispersion and its relation to instantaneous turbulent structures. 



The goal of the current project is to experimentally study the influence of turbulence on the dispersion characteristics. This can include (but is certainly not limited to):

- Creating  and valditing an Atmospheric Boundary Layer in the water tunnel facility in the Aero & Hydrodynamics laboratory at   3Me faculty.

- PIV/LIF measurements on a urban geometry (for instance a 3D printed TU campus model).

- Analysis of internal interfaces that separate regions of turbulent flow and its relation to dispersion.


Contact details

This project can be used to finish your M.Sc.-study “Solid & Fluid Mechanics”, “SPET”, or “MSP”.  I am searching for an enthusiastic, motivated and independent student that likes to take up such a challenging task. Please feel free to contact me in case you are interested or you have questions related to the topics as described above.

Ir. Jerke Eisma
Email:  H.E.Eisma@tudelft.nl