Quantifying inflow uncertainties in RANS simulations of urban pollutant dispersion

Quantifying uncertainties in primordial nucleosynthesis without Monte Carlo simulations

We present a simple method for determining the (correlated) uncertainties of the light element abundances expected from big bang nucleosynthesis, which avoids the need for lengthy Monte Carlo simulations. Our approach helps to clarify the role of the different nuclear reactions contributing to a particular elemental abundance and makes it easy to implement energy-independent changes in the meas...

Quantifying Uncertainties in Primordial Nucleosynthesis without Monte Carlo Simulations

We present a simple method for determining the (correlated) uncertainties of the light element abundances expected from big bang nucleosynthesis, which avoids the need for lengthy Monte Carlo simulations. Our approach helps to clarify the role of the diierent nuclear reactions contributing to a particular elemental abundance and makes it easy to implement energy-independent changes in the measu...

thermal effect on pollutant dispersion in an urban street canyon

his investigation was carried out to reveal the impact of solar radiation on wind flow structure and pollutant dispersion in an urban street canyon of aspect ratio of one using the computational fluid dynamic (cfd) technique. the simulation results (velocity and concentration data) show that heating from building wall surfaces and ground lead to strong buoyancy forces as the air is heated by th...

Microscopic modeling for atmospheric urban pollutant dispersion in dense urban road networks

RANS modeling of scalar dispersion from localized sources within a simplified urban-area model

The use of RANS models in the analysis of the urban climate and in air quality studies has become increasingly popular when predictions have to deal with complex flows, such as those arising at the street-scale. The need for model assessment and validation has thus also become crucial towards establishing the reliability of RANS simulations of heat and mass transport in urban areas. In this res...