%0 Journal Article %1 noauthororeditor %A Prabhakar, %A Singh, %D 2019 %J IJIRIS:: International Journal of Innovative Research in Information Security %K atmospheric dispersion pollutants simulation urban %N Issue II %P 29-39 %R doi://10.26562/IJIRIS.2019.FBIS10080 %T SIMULATION OF ATMOSPHERIC POLLUTANTS DISPERSION IN AN URBAN ENVIRONMENT %U http://www.ijiris.com/volumes/Vol6/iss02/01.FBIS10080.pdf %V Volume VI %X Interest in air pollution investigation of urban environment due to existence of industrial and commercial activities along with vehicular emission and existence of buildings and streets which setup natural barrier for pollutant dispersion in the urban environment has increased. The air pollution modelling is a multidisciplinary subject when the entire cities are taken under consideration where urban planning and geometries are complex which needs a large software packages to be developed like Operational Street Pollution Model (OSPM), California Line Source model (CALINE series) etc. On overviewing various works it can be summarized that the air pollutant dispersion in urban street canyons and all linked phenomenon such as wind flow, pollutant concentrations, temperature distribution etc. generally depend on wind speed and direction, building heights and density, road width, source and intensity of air pollution, meteorological variables like temperature, humidity etc. A unique and surprising case is observed every time on numerous combinations of these factors. The main aim of this study is to simulate the atmospheric pollutant dispersion for given pollutant like carbon monoxide, sulphur dioxide and nitrogen dioxide and given atmospheric conditions like wind speed and direction. Computational Fluid Dynamics (CFD) simulation for analysing the atmospheric pollutant dispersion is done after natural airflow analysis. Volume rendering is done for variables such as phase 2 volume fraction and velocity with resolution as 250 pixels per inch and transparency as 20%. It can be observed that all the three pollutant namely nitrogen dioxide, sulphur dioxide and carbon monoxide the phase 2 volume fraction changes from 0 to 1. The wind velocity changes from 3.395×10-13 m/s to 1.692×102 m/s. The dispersion of pollutants follow the sequence Sulphur dioxide>Carbon monoxide>Nitrogen dioxide.

@article{noauthororeditor, abstract = {Interest in air pollution investigation of urban environment due to existence of industrial and commercial activities along with vehicular emission and existence of buildings and streets which setup natural barrier for pollutant dispersion in the urban environment has increased. The air pollution modelling is a multidisciplinary subject when the entire cities are taken under consideration where urban planning and geometries are complex which needs a large software packages to be developed like Operational Street Pollution Model (OSPM), California Line Source model (CALINE series) etc. On overviewing various works it can be summarized that the air pollutant dispersion in urban street canyons and all linked phenomenon such as wind flow, pollutant concentrations, temperature distribution etc. generally depend on wind speed and direction, building heights and density, road width, source and intensity of air pollution, meteorological variables like temperature, humidity etc. A unique and surprising case is observed every time on numerous combinations of these factors. The main aim of this study is to simulate the atmospheric pollutant dispersion for given pollutant like carbon monoxide, sulphur dioxide and nitrogen dioxide and given atmospheric conditions like wind speed and direction. Computational Fluid Dynamics (CFD) simulation for analysing the atmospheric pollutant dispersion is done after natural airflow analysis. Volume rendering is done for variables such as phase 2 volume fraction and velocity with resolution as 250 pixels per inch and transparency as 20%. It can be observed that all the three pollutant namely nitrogen dioxide, sulphur dioxide and carbon monoxide the phase 2 volume fraction changes from 0 to 1. The wind velocity changes from 3.395×10-13 m/s to 1.692×102 m/s. The dispersion of pollutants follow the sequence Sulphur dioxide>Carbon monoxide>Nitrogen dioxide.}, added-at = {2019-02-19T16:04:06.000+0100}, author = {Prabhakar and Singh}, biburl = {https://www.bibsonomy.org/bibtex/204e13ec4194d3db7c7eaff294d3afd5f/ijiris}, description = {Air pollution is the condition at which concentrations of certain substances in the ambient air rises more than prescribed limit resulting into the remarkable effects on human beings, flora, fauna and materials like deterioration of white marble due to sulphur dioxide. Effects mainly cause due to significant increase in concentration of pollutants are unpleasant odours, irritation to the senses, respiratory illness, severe diseases, smoke visibility and obscuration, weather and climate changes and destructions to build-up areas due to corrosion. As there is rapid increase in urbanization and industrialization the air pollution became a serious problem in the last 200 years with considerable use of fossil fuels. Around 5 lakhs of the world’s population mainly children and aged people die prematurely every year due to air pollution. There is a huge requirement of funds for mitigation of air pollution impacts. Air pollution may either due to urban and industrial activities or from natural phenomenon. Researchers show interest in air pollution investigation of urban environment due to existence of industrial and commercial activities along with vehicular emission and existence of buildings and streets which setup natural barrier for pollutant dispersion in the urban environment. Now-a-days the idea of sustainable development widespread across the world so architecture prefer natural ventilation in the urban areas for best thermal and wind comfort by using big windows in place of small ones which reduce the cost of energy. Wind direction and wind flow pattern affect directly the air pollution dispersion as find out by study of natural ventilation. An example of urban site can be any residential complex in Delhi. To provide pleasant atmosphere for resident the pollutant dispersion caused by vehicular exhaust shall be reduced and intensification of the ventilation across the buildings is the key parameters. A study on vehicular pollution in Delhi reveals that around 20 to 25% is contributed by PM10 and PM2.5 during winter season. Also, IIT Kanpur finds that around 9% and 20% of emission loads are contributed by PM10 and PM2.5 respectively and out of which 10% contributed by passenger cars [1]. According to Ministry of Environment, Forest and Climate Change and Shekhar and SK S[2] apart from transport sector, domestic and power sectors also contribute to Air Pollution of Delhi with nearly 421.84 tons of CO, 110.45 tons NO2, 184.37 tons HC and 12.77 tons PM is released in capital atmosphere per day[2]. }, doi = {doi://10.26562/IJIRIS.2019.FBIS10080}, interhash = {8360afd85307feceaf181e5f5916ac63}, intrahash = {04e13ec4194d3db7c7eaff294d3afd5f}, issn = {2349-7017}, journal = {IJIRIS:: International Journal of Innovative Research in Information Security}, keywords = {atmospheric dispersion pollutants simulation urban}, language = {English, French}, month = {February 2019}, note = {1. Katiyar, A., Singh, S. K. & Haritash, A. K. Effect of Odd Even Scheme To Combat Air Pollution in Nct of Delhi. Int. J. Adv. Res 5, 2320–5407 (2017). 2. Shekhar Singh, S. & SK, S. Environmental Concerns in National Capital Territory of Delhi, India. J. Climatol. Weather Forecast. 03, 3–7 (2015). 3. 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(2003). doi:10.1016/S0167-6105(02)00380-X}, number = {Issue II}, pages = {29-39}, timestamp = {2019-02-19T16:04:06.000+0100}, title = {SIMULATION OF ATMOSPHERIC POLLUTANTS DISPERSION IN AN URBAN ENVIRONMENT}, url = {http://www.ijiris.com/volumes/Vol6/iss02/01.FBIS10080.pdf}, volume = {Volume VI}, year = 2019 }