Adaptive finite element simulation of stack pollutant emissions over complex terrains
Albert Oliver,Gustavo Montero,Rafael Montenegro,Eduardo Rodríguez,José María Escobar,Agustí Pérez-Foguet +5 more
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In this article, a three-dimensional finite element model for the pollutant dispersion is presented, where the first stage consists on the construction of an adaptive tetrahedral mesh of a rectangular region bounded in its lower part by the terrain and in its upper part by a horizontal plane.About:
This article is published in Energy.The article was published on 2013-01-01 and is currently open access. It has received 26 citations till now. The article focuses on the topics: Finite element method & Discretization.read more
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On the modeling of atmospheric pollutant dispersion during a diurnal cycle: A finite element study
TL;DR: In this paper, the authors presented a numerical model to study pollutant dispersion in the atmospheric boundary layer (ABL) by accounting for the mechanisms of advection by the mean wind in the horizontal direction, turbulent diffusion in the vertical direction to ground surface, dry deposition, and radioactive decay.
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Wind Forecasting Based on the HARMONIE Model and Adaptive Finite Elements
Albert Oliver,Eduardo Rodríguez,José María Escobar,Gustavo Montero,Mariano Hortal,Javier Calvo,J. M. Cascón,Rafael Montenegro +7 more
TL;DR: A new method for wind field forecasting over complex terrain using the predictions of the HARMONIE meso-scale model as the input data for an adaptive finite element mass-consistent wind model with a minimal user intervention.
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Isogeometric Residual Minimization Method (iGRM) with direction splitting for non-stationary advection–diffusion problems
TL;DR: The method mixes the benefits resulting from isogeometric analysis, implicit dynamics, residual minimization, and alternating direction solver with direction splitting, and shows that the resulting system of linear equations has a Kronecker product structure, which results in a linear computational cost of the direct solver.
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A multimesh adaptive scheme for air quality modeling with the finite element method
TL;DR: In this paper, a multimesh adaptive scheme for convection-diffusion-reaction problems for a large number of components is presented, where the evaluation of the nonreactive part for each component and the reaction at each node constitute independent tasks.
References
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NOx Emissions from Large Point Sources: Variability in Ozone Production, Resulting Health Damages and Economic Costs
TL;DR: In this paper, the authors present a proof-of-concept analysis of the measurement of the health damage of ozone (O3) produced from nitrogen oxides ( NO x = NO + NO 2 ) emitted by individual large point sources in the eastern United States.
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Adaptive h‐refinement on 3D unstructured grids for transient problems
Rainald Löhner,Joseph D. Baum +1 more
TL;DR: An adaptive finite element scheme for transient problems is presented and a high degree of vectorizability has been achieved by pre-sorting the elements and then performing the refinement/coarsening groupwise according to the case at hand.
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Benchmarking stiff ode solvers for atmospheric chemistry problems-I. implicit vs explicit
Adrian Sandu,Jan Verwer,M. van Loon,Greg Carmichael,Florian A. Potra,Donald Dabdub,John H. Seinfeld +6 more
TL;DR: In this paper, a comprehensive numerical comparison between five dedicated explicit and four implicit solvers for a set of seven benchmark problems from actual applications is presented, and the results presented may constitute a guide for atmospheric modelers to select a suitable integrator based on the type and dimension of their chemical mechanism and on the desired level of accuracy.
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Incomplete Cholesky Factorizations with Limited Memory
Chih-Jen Lin,Jorge J. Moré +1 more
TL;DR: An incomplete Cholesky factorization for the solution of large-scale trust region subproblems and positive definite systems of linear equations depends on a parameter p that specifies the amount of additional memory that is available; there is no need to specify a drop tolerance.
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Simultaneous untangling and smoothing of tetrahedral meshes
TL;DR: In this article, the authors proposed the substitution of objective functions having barriers by modified versions that are defined and regular on all R 3, which is also applicable to meshes with inverted elements, making a previous untangling procedure unnecessary.
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