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ghadyani--yasmin
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Assessing Major Sources and Components of Fine Particulate Matter (PM2.5) In Tehran
, M.Sc. Thesis Sharif University of Technology ; Arhami, Mohammad (Supervisor)
Abstract
Due to their adverse effects on human health and the environment, PM2.5 has been identified as one of the most important pollutants in Tehran. Considering the heterogeneous land use of this city, insufficient information on the amount and chemical components of these particles in its various regions, as well as lack of accurate information about the contribution of each source in the production of pollutants, this research investigates the concentration of fine particulate matter and its constituents in four stations of Tehransar, Sharif University of Technology, Shahid Mahallati and Shahriyar and studies their sources. Initially, the pollutant mass concentration and concentration of its...
The use of shock-detecting sensor to improve the stability of Lattice Boltzmann Model for high Mach number flows
, Article International Journal of Modern Physics C ; Volume 26, Issue 1 , 2015 ; 01291831 (ISSN) ; Esfahanian, V ; Taeibi Rahni, M ; Sharif University of Technology
World Scientific Publishing Co. Pte Ltd
2015
Abstract
Attempts to simulate compressible flows with moderate Mach number to relatively high ones using Lattice Boltzmann Method (LBM) have been made by numerous researchers in the recent decade. The stability of the LBM is a challenging problem in the simulation of compressible flows with different types of embedded discontinuities. The present study proposes an approach for simulation of inviscid flows by a compressible LB model in order to enhance the robustness using a combination of Essentially NonOscillatory (ENO) scheme and Shock-Detecting Sensor (SDS) procedure. A sensor is introduced with adjustable parameters which is active near the discontinuities and affects less on smooth regions. The...
Casson fluid flow with heat and mass transfer in a channel using the differential transform method
, Article Kuwait Journal of Science ; Volume 49, Issue 1 , 2022 , Pages 1-19 ; 23074108 (ISSN) ; Ali, K ; Ashraf, M ; Sharif University of Technology
University of Kuwait
2022
Abstract
In the present investigation, we consider the heat and mass transfer characteristics of steady, incompressible and electrically conducting Casson fluid flow in a channel. The effect of chemical reactions have also been considered. The differential transform method (DTM) is applied to a system of non-linear ODEs, and the results are obtained in the form of DTM series. The principal gain of this approach is that it applies to the non-linear ODEs without requiring any discretization, linearization or perturbation. The velocity, mass and heat transfer profiles thus obtained are in good agreement with those provided by the quasi-linearization method (QLM). Graphical results for velocity,...