2012
DOI: 10.2298/tsci110128036m
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Numerical simulation of sudden-expansion particle-laden flows using the Eulerian lagrangian approach

Abstract: A Lagrangian-Eulerian model for the dispersion of solid particles in sudden-expansion flows is reported and validated. The fluid was calculated based on the Eulerian approach by solving the Navier-Stokes equations. A Lagrangian model is also applied, using a Runge-Kutta method to obtain the particle trajectories. The effect of fluid turbulence upon particle dispersion is taken into consideration through a statistical model. The predicted axial mean velocity and turbulent kinetic energy of both phases ag… Show more

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Cited by 6 publications
(3 citation statements)
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“…The existence of diverse industrial applications that involve the flow with particles through a pipe with a sudden expansion together with the complexity of the flow and the phenomena that take place in it (It combines a region of strong nonequilibrium, the recirculation zone, followed by a region where the flow returns to equilibrium), make this study very interesting and useful. Many researches are available in the literature on this subject: Tashiro and Tomita (1986), Ahmadi and Chen (1998), Founti and Klipfel (1998), Aguinaga et al (2008), Terekhov and Pakhomov (2008), Mergheni et al (2012), Pakhomov and Terekhov (2013) and El-Askary et al (2015). In this review, the study of flow laden with particles through this geometry, has been mostly experimental whereas numerical studies have been developed in a twodimensional domain, and most of them as twoequation turbulence models.…”
Section: Introductionmentioning
confidence: 99%
“…The existence of diverse industrial applications that involve the flow with particles through a pipe with a sudden expansion together with the complexity of the flow and the phenomena that take place in it (It combines a region of strong nonequilibrium, the recirculation zone, followed by a region where the flow returns to equilibrium), make this study very interesting and useful. Many researches are available in the literature on this subject: Tashiro and Tomita (1986), Ahmadi and Chen (1998), Founti and Klipfel (1998), Aguinaga et al (2008), Terekhov and Pakhomov (2008), Mergheni et al (2012), Pakhomov and Terekhov (2013) and El-Askary et al (2015). In this review, the study of flow laden with particles through this geometry, has been mostly experimental whereas numerical studies have been developed in a twodimensional domain, and most of them as twoequation turbulence models.…”
Section: Introductionmentioning
confidence: 99%
“…In Eulerian-Lagrangian models, the turbulent gas flow was governed by Eulerian approach, whereas the particulate flow was governed by the Lagrangian trajectory equations. The Eulerian-Lagrangian approach was used by Mergheni et al [13] and Pakhomov and Terekhov [14]. They found that the model can predict the particle laden flow successfully.…”
Section: Introductionmentioning
confidence: 99%
“…Sus resultados permitieron establecer regímenes de flujo donde los choques entre partículas pueden modificar la energía cinética turbulenta de las partículas.Aguinaga et al [2008], estudian experimentalmente la dispersión y deposición de gotas en un flujo a través de una expansión súbita, mostrando que la máxima deposición ocurre dentro de la zona de recirculación; en 2008 también fue publicado el trabajo de Terekhov y Pakhomov, quienes desarrollaron un modelo matemático para simular el flujo turbulento multifásico a través de una tubería con expansión súbita axisimétrica, ambas fases fueron tratadas mediante un enfoque Euleriano. Otra de las publicaciones revisadas corresponde aMergheni et al [2012], quienes utilizan un enfoque Euleriano-Lagrangiano para estudiar la dispersión de partículas inmersas en un líquido a través de una tubería con expansión súbita. La simulación es llevada a cabo en un dominio bidimensional, donde resuelven las ecuaciones de conservación de masa y cantidad de movimiento para flujo estacionario, discretizadas mediante el método de los volúmenes finitos, incluyendo el efecto de la turbulencia a través del modelo 𝑘 − 𝜀. Las ecuaciones de las partículas incluyen la fuerza de arrastre y son resueltas usando un esquema de Runge-Kutta de 4° orden; la influencia de las partículas sobre la fase de transporte la incluyen en los términos fuente de las ecuaciones gobernantes.…”
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