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Conference Paper: Large-eddy simulation of turbulent flows and pollutant transport inside and above idealized urban street canyons under different unstable thermal stratification
Title | Large-eddy simulation of turbulent flows and pollutant transport inside and above idealized urban street canyons under different unstable thermal stratification |
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Authors | |
Issue Date | 2013 |
Citation | The 2013 European and African Conference on Wind Engineering (EACWE 2013), Cambridge, UK., 7-11 July 2013. How to Cite? |
Abstract | Large-eddy simulation (LES) is employed to study the behaviours of flows and pollutant transport
inside and over idealized urban street canyons under different unstable thermal stratification. Three
configurations of idealized street canyon, consisting of building-height-to-street-width (aspect) ratios,
0.5, 1 and 2, are considered. Under unstable stratification, the vertical profiles of streamwise velocity
and temperature over the bottom rough surface are more uniform and the turbulent transport of
momentum and heat are enhanced. Inside the street canyons, the ventilation performance, which are
characterized by the air exchange rate (ACH), pollutant exchange rate (PCH), pollutant retention time
and average pollutant concentration, is found improved in unstable stratification. |
Persistent Identifier | http://hdl.handle.net/10722/190043 |
DC Field | Value | Language |
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dc.contributor.author | Chan, MC | en_US |
dc.contributor.author | Liu, CH | en_US |
dc.date.accessioned | 2013-09-17T15:04:42Z | - |
dc.date.available | 2013-09-17T15:04:42Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.citation | The 2013 European and African Conference on Wind Engineering (EACWE 2013), Cambridge, UK., 7-11 July 2013. | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/190043 | - |
dc.description.abstract | Large-eddy simulation (LES) is employed to study the behaviours of flows and pollutant transport inside and over idealized urban street canyons under different unstable thermal stratification. Three configurations of idealized street canyon, consisting of building-height-to-street-width (aspect) ratios, 0.5, 1 and 2, are considered. Under unstable stratification, the vertical profiles of streamwise velocity and temperature over the bottom rough surface are more uniform and the turbulent transport of momentum and heat are enhanced. Inside the street canyons, the ventilation performance, which are characterized by the air exchange rate (ACH), pollutant exchange rate (PCH), pollutant retention time and average pollutant concentration, is found improved in unstable stratification. | - |
dc.language | eng | en_US |
dc.relation.ispartof | European and African Conference on Wind Engineering, EACWE 2013 | en_US |
dc.title | Large-eddy simulation of turbulent flows and pollutant transport inside and above idealized urban street canyons under different unstable thermal stratification | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Chan, MC: zz047@hku.hk | en_US |
dc.identifier.email | Liu, CH: chliu@hku.hk | en_US |
dc.identifier.authority | Liu, CH=rp00152 | en_US |
dc.description.nature | postprint | - |
dc.identifier.hkuros | 224515 | en_US |
dc.customcontrol.immutable | sml 140415 | - |