Writing the Structures of the Subject

Greenshields, Will

doi:10.1007/978-3-319-47533-2

Cited by 9 publications

(6 citation statements)

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“…En términos de la resolución espacial de la malla, tanto para oleaje progresivo como estacionario, el criterio de Arjona (2016) requirió un menor costo computacional que Para oleaje progresivo, se alcanzó una estabilidad temporal de los resultados a los 20 s (al pasar unas diez ondas por el dominio) y las simulaciones de 100 y 200 s no generaron mejoras en los resultados. En contraste, para oleaje estacionario, a los 20 s se obtuvieron diferencias importantes respecto de los resultados con 100 s y 200 s de simulación, indicando que la duración mínima de modelación sugerida por los desarrolladores de OpenFOAM -interFoam (Greenshields, 2017) fue insuficiente para alcanzar estabilidad temporal.…”

Section: Conclusionesunclassified

Modelación de oleaje en un canal bidimensional mediante OpenFOAM

Contreras,

Winckler

2023

obrasypro

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Los modelos CFD (Computational Fluid Dynamics) constituyen una buena herramienta para evaluar la interacción de flujos complejos con obras costeras. Estos modelos permiten reemplazar las fórmulas empíricas para la estimación del sobrepaso, cuya validez es limitada a las condiciones experimentales. Sin embargo, su uso es aún incipiente en el contexto chileno, planteando diversos desafíos a los usuarios. En este estudio se presenta la calibración y validación de un canal de olas numérico mediante el modelo CFD OpenFOAM con el solver olaFlow. Se analizan los casos de oleaje en régimen progresivo, cuasi-estacionario y estacionario.

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Section: Conclusionesunclassified

Modelación de oleaje en un canal bidimensional mediante OpenFOAM

Contreras,

Winckler

2023

obrasypro

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“…The governing equations were solved using a custom-made solver based on the basis of (Open FOAM) C++ libraries [87]. The numerical model was based on the finite volume method and the pressure implicit splitting of operators (PISO) algorithm, applying one predictor and two corrector steps to find the velocity and pressure field.…”

Section: Mathematical and Numerical Modelmentioning

confidence: 99%

Mechanism of nonequilibrium plasma-enhanced ignition in the event of dual-pulse laser energy deposition

Mahamud¹

2022

J. Phys. D: Appl. Phys.

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A two-dimensional and three-temperature mathematical model for dual-pulse laser ignition was applied to study the mechanism of the nonequilibrium plasma process during dual-pulse laser energy deposition. The two-dimensional model could predict the influence of the reaction kinetics and nonequilibrium effects on the ignition delay time and kernel dynamics. As the plasma reaction rates were extremely fast compared with the combustion reaction rates, it can be predicted that the variability of the plasma lifetime will directly influence the ignition delay time and reaction kinetics. The results suggested that the energy relaxation rate from the electronic state was rapid compared to that from the vibrational state due to the short lifetime of the plasma state. However, the relatively slower energy relaxation from the vibrational state provided long-term thermalization of the ignition kernel. For the same level of energy deposition, the nonequilibrium plasma system predicted a higher rate of vorticity generation, signifying a higher level of mixing and baroclinicity production. The results also suggested that ignition in a premixed fuel airflow required a higher degree of energy deposition, due to a higher rate of radical and thermal losses.

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“…In particular, the method adaptation will ensure that all the sewer design constraints are systematically satisfied so that pressure drops and construction cost function are freely minimized. An algorithm for the method will be developed in this study, and its codes will be written and implemented on the free Open Source CFD package OpenFOAM [13].…”

Section: Cfd Modelsmentioning

confidence: 99%

“…Due to the advancements in computer technology in recent years, the CFD technique has been a powerful and effective tool to model the real life behaviour of fluids [18]. The free the open source CFD packages, OpenFOAM, based on the standard k-ε model and the Volume of Fluid (VOF) free surface model was used to model the sewer fluid flows, in order to predict maximum flow rate [13,14]. In meshing, hexahedral mesh was used due to its capabilities in providing high-quality solution, with a fewer number of cells than comparable tetrahedral mesh for simple geometry.…”

Section: Sewer Network Design Optimizationmentioning

confidence: 99%

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An Application of Computational Fluid Dynamics to Optimize Municipal Sewage Networks; A Case of Tororo Municipality, Eastern Uganda.

Noah

Masanja

Nampala

et al. 2020

JAM

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Two-phase pipe ﬂow is a common occurrence in many industrial applications such as sewage, water, oil, and gas transportation. Accurate prediction of liquid velocity, holdup and pressure drop is of vast importance to ensure eﬀective design and operation of ﬂuid transport systems. This paper aimed at the simulation of a two-phase ﬂow of air and sewage (water) using an open source software OpenFOAM. Numerical Simulations have been performed using varying dimensions of pipes as well as their inclinations. Specifically, a Standard k- turbulence model and the Volume of Fluid (VOF) free water surface model is used to solve the turbulent mixture flow of air and sewage (water). A two dimensional, 0.5m diameter pipe of 20m length is used for the CFD approach based on the Navier-Stokes equations. Results showed that the ﬂow pattern behaviour is influenced by the pipe diameters as well as their inclination. It is concluded that the most effective way to optimize a sewer network system for Tororo Municipality conditions and other similar situations, is by adjusting sewer diameters and slope gradients and expanding the number of sewer network connections of household and industries from 535 (i.e., 31.2% of total) to at least 1,200 (70% of total).

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Writing the Structures of the Subject

Cited by 9 publications

References 0 publications

Modelación de oleaje en un canal bidimensional mediante OpenFOAM

Modelación de oleaje en un canal bidimensional mediante OpenFOAM

Mechanism of nonequilibrium plasma-enhanced ignition in the event of dual-pulse laser energy deposition

An Application of Computational Fluid Dynamics to Optimize Municipal Sewage Networks; A Case of Tororo Municipality, Eastern Uganda.

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