PPT-Large-Eddy simulation of Pollutant Plume Dispersion over 2D

Colman CC Wong amp ChunHo Liu Department of Mechanical Engineering The University of Hong Kong March 3 2011 Outline Introduction Methodology Results amp Discussion Pollutant transport below and around roof level. THE ONLINE CFM BOOK 2 ABSTRACT The application of large eddy simulation (LES) to the prediction of large-scale chaotic structures in stirred tanks is investigated. Flow regimes representing typical s Contaminant Transport. Modelling. Contaminant Transport in Porous Media. Advection. Advection causes translation of the solute field by moving the solute with the flow velocity. In 1-d all is does is shift the plume in time by a distance . Marti Blad PhD PE. EPA Definitions. Dispersion Models. : Estimate pollutants at ground level receptors. Photochemical Models. : Estimate regional air quality, predicts chemical reactions. Receptor Models. A New Visualization of . Multi-Model Ensemble Forecasts . Developed to Advance Climate Prediction Research and Communication. Jennifer M. Adams. Center for Ocean-Land-Atmosphere Studies. George Mason University. Environmental Models. Chapter 3: Air Quality Modeling. 3.7: The Basic Plume Model. Puffs vs. Plumes. Consider two distinct types of smoke stack releases shown to the right (Figure 3.15 from . Hadlock. . TRADD, part 2. Ari Rabl, ARMINES/. Ecole. des Mines de Paris. , . November 2013. There are . many different models. for atmospheric dispersion and chemistry, . with different objectives. : e.g. . Let’s take everything we have learned so far and now add in the two other processes discussed in the introduction chapter – . advection and retardation. Solve any way you want. What does advection do?. . A . Brief . Introduction. Image from Univ. of Waterloo Environmental Sciences. Marti Blad. 2. Transport of Air Pollution. Plumes tell story. Ambient . vs. DALR. Models predict air pollution concentrations . M. edia. MSc.Nooshin Bahar . Supervisor: Prof. Manfred Koch . Figure from Hornberger et al. (1998). Generalization of Darcy’s column. . . h/L = hydraulic . gradient. q = Q/A. Q is proportional. EPA Definitions. Dispersion Models. : Estimate pollutants at ground level receptors. Photochemical Models. : Estimate regional air quality, predicts chemical reactions. Receptor Models. : Estimate contribution of multiple sources to receptor location based on multiple measurements at receptor. 1. Simulation. Point to point link – single wavelength. Point to point link – multiple wavelengths. 2. Dispersion compensation. Bit rate: 40Gb/s, bit length: 8 bit. User define bit sequence: 00010001. Policy Analysis . Regional Planning . Supplementary Control Systems / Air Quality Prediction System . Emergency Preparedness / Accidental Releases . Long Range Transport (Acid Rain) . State Implementation Plan Revisions / New Source Review . Haimin FAN, Yuanwei MA, Dezhong WANG . School of Nuclear Science and Engineering, Shanghai Jiaotong University . Introduction. Machinery manufacturing. Fluid simulation verification. Overview of multi-fan wind tunnel. ?. The improved spatial, temporal and spectral attributes of the ABI allow for monitors plumes associated with rockets and other hotspots. . Instead of needing to show 3 or 4-panels with separate spectral bands, these RGBs combine information on the plumes from several key spectral bands: 3.9 micrometer or the “fire band”, the upper-level water vapor band (8), and a visible or “near-visible” band. ABI band 2 is used during the day, while the 7.3 micrometer (water vapor) band at night. .