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Relevant bibliographies by topics / Computional modeling

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Academic literature on the topic 'Computional modeling'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Computional modeling"

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Cremer, M. A., C. J. Montgomery, D. H. Wang, M. P. Heap, and J. Y. Chen. "Development and implementation of reduced chemistry for computional fluid dynamics modeling of selective non-catalytic reduction." Proceedings of the Combustion Institute 28, no. 2 (January 2000): 2427–34. http://dx.doi.org/10.1016/s0082-0784(00)80656-6.

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Wardle, Kent E., and Henry G. Weller. "Hybrid Multiphase CFD Solver for Coupled Dispersed/Segregated Flows in Liquid-Liquid Extraction." International Journal of Chemical Engineering 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/128936.

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The flows in stage-wise liquid-liquid extraction devices include both phase segregated and dispersed flow regimes. As a additional layer of complexity, for extraction equipment such as the annular centrifugal contactor, free-surface flows also play a critical role in both the mixing and separation regions of the device and cannot be neglected. Traditionally, computional fluid dynamics (CFD) of multiphase systems is regime dependent—different methods are used for segregated and dispersed flows. A hybrid multiphase method based on the combination of an Eulerian multifluid solution framework (per-phase momentum equations) and sharp interface capturing using Volume of Fluid (VOF) on selected phase pairs has been developed using the open-source CFD toolkit OpenFOAM. Demonstration of the solver capability is presented through various examples relevant to liquid-liquid extraction device flows including three-phase, liquid-liquid-air simulations in which a sharp interface is maintained between each liquid and air, but dispersed phase modeling is used for the liquid-liquid interactions.

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FLÅM, SJUR DIDRIK, and KJETIL GRAMSTAD. "DIRECT EXCHANGE IN LINEAR ECONOMIES." International Game Theory Review 14, no. 04 (December 2012): 1240006. http://dx.doi.org/10.1142/s0219198912400063.

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Considered here is direct exchange of production allowances or input factors. Motivated by practical modeling and compution, we suppose every owner or user of such items has a linear technology. The issue is whether competitive market equilibrium can be reached merely via iterated bilateral barters. This paper provides positive and constructive answers.

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Griffith, Daniel A., and Sone Akio. "Trade-offs associated with normalizing constant computional simplifications for estimating spatial statistical models1." Journal of Statistical Computation and Simulation 51, no. 2-4 (February 1995): 165–83. http://dx.doi.org/10.1080/00949659508811630.

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Buľko, Branislav, Ivan Priesol, Peter Demeter, Peter Gašparovič, Dana Baricová, and Martina Hrubovčáková. "Geometric Modification of the Tundish Impact Point." Metals 8, no. 11 (November 14, 2018): 944. http://dx.doi.org/10.3390/met8110944.

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In connection with the increasing requirements for cleanliness in conticast steel, it is necessary to develop original solutions. The tundish, as the last refractory-lined reactor, gives enough space to remove inclusions by optimizing the flow of steel. The basic component of the tundish is the impact pad, the shape of which creates a suitable flow of steel, thus making it part of the tundish metallurgy. The optimal steel flow in the tundish must avoid creating dead zone areas, or the slag “eye” phenomenon in the slag layer around the ladle shroud, and is intended to create conditions for the release of inclusions by promoting reactions at the steel-slag phase interface. The flow also has to prevent excessive erosion of the tundish refractory lining. This paper compares the standard impact pad with the “Spheric” spherical impact pad using computional fluid dynamiscs (CFD) tools and physical modelling. The evaluation criteria are residence time and flow in the tundish at three different casting speeds.

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Li, Yao, and Da Lin Jiang. "Dynamic Task-Scheduling Based Parallel Processing on Watershed Distributed Eco-Hydrological Model." Applied Mechanics and Materials 556-562 (May 2014): 3492–95. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3492.

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Watershed distributed eco-hydrological model is an important tool in the field of global change research. Due to the complexity of eco-hydrological model, watershed distributed eco-hydrological simulation requires large amounts of computations. The compution overhead turns to be a big prolem for those basin areas. Another challenge is that the traditional sequential computation techniques cannot meet the requirements of watershed eco-hydrological model, which highly limits the application of watershed distributed eco-hydrological model in large scale areas. This paper proposed a dynamic task-scheduling based parallel processing method for eco-hydrological model. The whole simulation task are firstly decoupled into independent grid based parallel processing tasks based on the relation of upstream and downstream sequence. Then a dynamic task-tree was built up according to the dependency of each cell in the watershed, which can generate dynamic task scheduling sequence. Following the task scheduling sequence, PBS task scheduler submitted workloads, realizing parallel calculation. This approach was applied in the watershed of Walnut Gulch watershed in Arizona, USA. The result showed that this method can highly improves the efficiency of watershed eco-hydrological modeling almost 6 times compared to that of the traditional sequential eco-hydrological modeling. Therefore, this approach can effectively promote the applications of watershed eco-hydrological model.

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Ivanauskas, Feliksas, Aleksas Pikturna, and Karolis Valiulis. "Computional modeling of University budget and finance." Lietuvos matematikos rinkinys 54 (December 20, 2013). http://dx.doi.org/10.15388/lmr.b.2013.08.

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The discrete time mathematical model describing fundamental processes of the university, i.e. interdynamics among students, lectures and finances is presented. The model consists of three differential equations.

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8

Irick, Kevin, and Nima Fathi. "Computional Evaluation of Thermal Response of Open-Cell Foam with Circular Pore." Journal of Verification, Validation and Uncertainty Quantification, December 15, 2020. http://dx.doi.org/10.1115/1.4049323.

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Abstract The evaluation of effective material properties in heterogeneous materials (e.g., composites or multicomponent structures) critically relevant to a wide spectrum of applications, including nuclear power, electronic packaging, flame retardants, hypersonics, and gas turbine power. The work described in this paper is centered around the numerical assessment of the thermal behavior of porous materials obtained from finite element thermal modeling and simulation. Two-dimensional, steady state analyses were performed on unit cells with centered, circular pores using a second order accurate Galerkin finite element method (FEM). The effective thermal conductivities of the porous systems were examined, encompassing a range of porosities from 4.9% to 60.1%. The geometries of the models were generated based on ordered circular pores for each modeled porosity level. The system response quantity (SRQ) under investigation was the dimensionless effective thermal conductivity across the unit cell. The dimensionless effective thermal conductivity was compared across all simulated cases, producing a trend between porosity and effective thermal conductivity. In the presented investigation, the method of manufactured solutions (MMS) was used to perform code verification, and the grid convergence index (GCI) was employed to estimate discretization uncertainty as solution verification. Code verification concluded an approximately second order accurate Galerkin FEM solver. It was found that the introduction of porosity to the unit cell material structure reduces effective thermal conductivity, as anticipated. Numerical results obtained in this study are compared to an analytical solution and to a sample of empirical data.

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Dissertations / Theses on the topic "Computional modeling"

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Ananthasayanam, Balajee. "Computional modeling of precision molding of aspheric glass optics." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1239896471/.

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Oplt, Tomáš. "Porovnání výsledků modální analýzy desky plošných spojů dosažených výpočtovým a experimentálním modelováním." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232000.

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Modal analysis of printed circuit board results, gained from computional and experimental modeling, have been compared. Anylyses have been performed on dummy boards (models without electronic components), created as one-layered at first, then as three-layered PCB. Board is usually clamped by its longer edges with wedgelock. In order to enable the realization of boundary conditions in computional and experimental modeling, real clamping has been simplified to simply supported. Computional models have used FEM elements, which are comomnly used in this type of problem. Determined results have been evaluated by comparing the experimental modeling results. Models‘ sensitivity on modification of element length and number of elements through thickness have been performed.

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Ředina, Richard. "Model fibrilace síní." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442495.

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The aim of this master thesis is to create a 3D electroanatomical model of a heart atria, which would be able to perform atrial fibrillation. To control the model, the differential equations of the FitzHugh-Nagumo model were chosen. These equations describe the change of voltage on the cell membrane. The equations have established parameters. The modification of them leads to changes in the behavior of the model. The simulations were performed in the COMSOL Multiphysics environment. In the first step, the simulations were performed on 2D models. Simulations of healthy heart, atrial flutter and atrial fibrillation were created. The acquired knowledge served as a basis for the creation of a 3D model on which atrial fibrillation was simulated on the basis of ectopic activity and reentry mechanism. Convincing results were obtained in accordance with the used literature. The advantages of computational modeling are its availability, zero ethical burden and the ability to simulate even rarer arrhythmias. The disadvantage of the procedure is the need to compromise between accuracy and computational complexity of simulations.

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Books on the topic "Computional modeling"

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D, Maughmer Mark, and United States. National Aeronautics and Space Administration., eds. A computionally efficient modelling of laminar separation bubbles. University Park, PA: Dept. of Aerospace Engineering, Pennsylvania State University, 1990.

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2

United States. National Aeronautics and Space Administration., ed. A computionally efficient modelling of laminar separation bubbles. [Washington, DC: National Aeronautics and Space Administration, 1988.

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3

D, Maughmer Mark, and United States. National Aeronautics and Space Administration., eds. A computionally efficient modelling of laminar separation bubbles. [Washington, DC: National Aeronautics and Space Administration, 1990.

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4

D, Maughmer Mark, and United States. National Aeronautics and Space Administration., eds. A computionally efficient modelling of laminar separation bubbles: Semi-annual status report, June 1988 - January 1989 for NASA grant NAG-1-778. University Park, PA: Dept. of Aerospace Engineering, Pennsylvania State University, 1989.

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Book chapters on the topic "Computional modeling"

1

Hjertager, B. H., and T. Solberg. "A Review of Computional Fluid Dynamics (CFD) Modeling of Gas Explosions." In Prevention of Hazardous Fires and Explosions, 77–91. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4712-5_7.

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Conference papers on the topic "Computional modeling"

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Ghoreyshi, Mehdi, Adam Jirasek, Russell Cummings, Martiqua Post, Keith Bergeron, and Robert Decker. "A Computional Investigation into the Use of Response Functions for Aerodynamic Loads Modeling." In 29th AIAA Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-3518.

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