Dispersion of localised releases in a street network (DIPLOS)
Lead Research Organisation:
University of Southampton
Department Name: Faculty of Engineering & the Environment
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Organisations
Publications
Boppana B,; Xie ZT; Castro IP
(2014)
Thermal Stratification and Wind Direction Effects on Urban Flows
Castro I
(2016)
Measurements and Computations of Flow in an Urban Street System
in Boundary-Layer Meteorology
Castro IP
(2017)
Are Urban-Canopy Velocity Profiles Exponential?
in Boundary-layer meteorology
Chen Y
(2020)
Large eddy simulation of flow past stationary and oscillating square cylinders
in Journal of Fluids and Structures
Coburn M
(2022)
Numerical Simulations of Boundary-Layer Airflow Over Pitched-Roof Buildings
in Boundary-Layer Meteorology
Fuka V
(2018)
Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings.
in Boundary-layer meteorology
Fuka Vladimir
(2016)
Domain nesting for multi-scale large eddy simulation
in EGU General Assembly Conference Abstracts
Goulart E
(2019)
Local and non-local effects of building arrangements on pollutant fluxes within the urban canopy
in Building and Environment
Hertwig D
(2018)
Evaluation of fast atmospheric dispersion models in a regular street network
in Environmental Fluid Mechanics
Melo A
(2023)
Influence of wind direction and source location on peak-to-mean concentration ratios in urban environments
in Journal of Wind Engineering and Industrial Aerodynamics
Santos J
(2019)
Using Large-Eddy Simulation and Wind-Tunnel Data to Investigate Peak-to-Mean Concentration Ratios in an Urban Environment
in Boundary-Layer Meteorology
Sessa V
(2018)
Turbulence and dispersion below and above the interface of the internal and the external boundary layers
in Journal of Wind Engineering and Industrial Aerodynamics
Sessa V
(2020)
Thermal Stratification Effects on Turbulence and Dispersion in Internal and External Boundary Layers
in Boundary-Layer Meteorology
Xie ZT
(2018)
A Note on Spatial Averaging and Shear Stresses Within Urban Canopies.
in Boundary-layer meteorology
Xie ZT
(2015)
Modelling gas and PM pollutant dispersion in urban environments
in Advances in Mechanics
Zheng-Tong Xie
(2017)
A note on spatial averaging and shear stresses within urban canopies
in Boundary-Layer Meteorology
Description | The character of the scalar dispersion from a localized source in an array of rectangular buildings strongly depends on the position of the source relative to the street network and the wind direction. In the simulated case with wind direction 0°, where the scalar source lies in a street perpendicular to the mean flow, the scalar is transported above the canopy by the recirculation in the street canyon. The streamwise scalar flux above the canopy is then larger than the corresponding flux below the roof level. The vertical concentration variance sz at the plume centreline is larger than 1H and is increasing with the distance from the source. The asymmetry of the experimental results and a computational sensitivity study showed that a small change of the wind direction between 1° and 3° can strongly affect the plume shape. We should take into account such uncertainties into the quick prediction models. When the scalar source is located in the street parallel to the mean wind direction, as in the simulated 90° case, the scalar is advected by the mean flow inside the street and transported upwards by turbulence and by recirculating flow in the spanwise streets. The streamwise scalar flux within the canopy is larger than the corresponding flux above and the sz at the plume centreline is smaller than 1H within the simulated domain. |
Exploitation Route | The obtained knowledge will be shared through publication, conferences/workshops etc; also through partnership with others. |
Sectors | Aerospace Defence and Marine Energy Environment Security and Diplomacy |
URL | http://www.diplos.org |
Description | 1. The developed approaches have been used in the DSTL part-time phd project 'Modelling the production and transport of vapour from explosives in an indoor environment considering effects of mechanical and natural ventilation'. The project is conducted by DSTL employee Mr Tim Foat under Dr ZT Xie's supervision. 2. The developed technology has been used in Wessex Petroleum Limited (WP), and has successfully approved WP Fuel Solutions' new concept - a more effective bottom filtration pipework for fuel tanks. 3. The research output resulted in a new research project ( Air Quality Around Tall Buildings in London) with industry company RWDI funded by London City Council, 2018-19. |
First Year Of Impact | 2015 |
Sector | Aerospace, Defence and Marine,Energy,Environment |
Impact Types | Policy & public services |
Description | Breathing City: Future Urban Ventilation Network |
Amount | £507,945 (GBP) |
Funding ID | NE/V002082/1 |
Organisation | Natural Environment Research Council |
Sector | Public |
Country | United Kingdom |
Start | 08/2020 |
End | 08/2024 |
Description | Fluid dynamics of Urban Tall-building clUsters for Resilient built Environments (FUTURE) |
Amount | £364,640 (GBP) |
Funding ID | EP/V010514/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 05/2021 |
End | 12/2024 |
Description | UK Intelligence Community Postdoctoral Research Fellowship: Increasing high-fidelity modelling efficiency with automation and machine learning |
Amount | £199,050 (GBP) |
Funding ID | ICRF2324-7-144 |
Organisation | Royal Academy of Engineering |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 11/2023 |
End | 10/2025 |
Description | ARCHER eCSE |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Department | ARCHER Service |
Country | United Kingdom |
Sector | Academic/University |
PI Contribution | the developed code will be made accessible to the ARCHER community. |
Collaborator Contribution | technique support, etc. |
Impact | to come. |
Description | Newton Research Collaboration Programme 14/03/2017-14/03/2018 with Brazilian partners |
Organisation | Federal University of Espírito Santo |
Country | Brazil |
Sector | Academic/University |
PI Contribution | The collaboration between UFES in Brazil and the University of Southampton in the UK will allow for partaking LES, DNS and wind tunnel experimental data obtained in a previous project developed by the University of Southampton with UK partners. It will also allow for sharing knowledge and experience already gained by both teams about the methodologies involved in using turbulence models. Turbulence modelling is a big challenge, enhancing the knowledge of LES and DNS will certainly help the UK engineering community. The UK Met Office, DSTL and NCAS (National Centre for Atmospheric Science) are the partners of the DIPLOS project for which the Applicant is the Southampton PI. These partners will attend the final DIPLOS workshop in Mar/2017 in Southampton. Contribution from the co-Applicant's team will benefit to these partners. In addition, the Applicant is a member of NCAS, a committee member of the UK Wind Engineering Society and is currently supported by DSTL through a few Phd student projects. The proposed project will be beneficial to all of these collaborations. |
Collaborator Contribution | The co-Applicant's team will test the Applicant's recently developed tool - a Numerical Environmental Wind Tunnel Of Newtonian fluid (NEWTON) for a wider range of applications, such as thermal stratification effects. Brazil has several research funding agencies which, in time, can be used to fund further research on the topic. In addition, the Supercomputing Centre for Industrial Innovation (YEMOJA), which is the largest in Latin America, is fully accessible to the Brazilian research group including academic visitors. |
Impact | The two teams will publish 5 journal and conference papers. These will have impacts for the international engineering community and the general public. |
Start Year | 2007 |
Description | Supervising a DSTL employee as a Part-Time PhD student in Southampton |
Organisation | Defence Science & Technology Laboratory (DSTL) |
Country | United Kingdom |
Sector | Public |
PI Contribution | The title of the part-time phd research of DSTL is 'Modelling the production and transport of vapour from explosives in an indoor environment considering effects of mechanical and natural ventilation'. The phd student Tim Foat has successfully passed his first milestone viva. My research team provides expertise, and computer resources. |
Collaborator Contribution | Tim Foat in turn inputs industry drivers, reported conf papers with Southampton as co-institution, and is writing joint papers with Southampton. |
Impact | A joint conference paper (DSTL+ Southampton) was reported in the 68th Annual Meeting of the APS Division of Fluid Dynamics. http://meetings.aps.org/Meeting/DFD15/Event/255644 |
Start Year | 2014 |
Description | co-supervising a phd student in Eindhoven University of Technology |
Organisation | Eindhoven University of Technology |
Country | Netherlands |
Sector | Academic/University |
PI Contribution | co-supervising a phd student in Eindhoven University of Technology |
Collaborator Contribution | In turn the partner will co-publish paper with me, provide experimental data etc. |
Impact | To come |
Start Year | 2006 |
Description | collaboration with DSTL |
Organisation | Defence Science & Technology Laboratory (DSTL) |
Country | United Kingdom |
Sector | Public |
PI Contribution | The university of Southampton will provide 50% of two phd studentships (and other relevant support), which will be co-supervised with DSTL. |
Collaborator Contribution | DSTL ill provide 50% of two phd studentships. |
Impact | this collaboration has just started and we are recruiting the phd students. |
Start Year | 2014 |