CFD Simulation of Flows in Stirred Tank Reactors Through Prediction of Momentum Source

Huang, Weidong; Li, Kun

doi:10.5772/51754

Cited by 16 publications

(24 citation statements)

References 28 publications

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“…There have been numerous investigations of the fluid flow in stirred tanks. In the literature, there are several approaches of turbulence models (k-ε; k-ω; Reynolds stress model; large eddy simulation) and most of the studies were performed based on the k-ε model [7][8][9][10][11] and the Reynolds stress model (RSM) [12][13][14]. The under-prediction of dissipative scales is quite often mentioned in many studies when k-ε and RSM models are used especially near the impeller region where the flow is extremely anisotropic [15,16].…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of turbulent flow in stirred tank with a curved blade impeller

Devi

Kumar

2015

J. Engin. Thermophys.

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The turbulent flow field generated in a baffled stirred tank by a curved blade impeller has been investigated by employing large-eddy simulation (LES). The Smagorinsky-Lilly and kinetic energy transport model was used to model the unresolved, or subgrid, scales. The simulation has been validated by using available experimental observations on Rushton turbine and found reasonable agreement justifying the capability of the LES model in accurate prediction of turbulent characteristics in a stirred tank. Detailed analysis has been done for a stirred tank with a curved blade (CD-6) impeller to ascertain the flow characteristics of the curved blade impeller, which is generally considered to be the highly efficient impeller.

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Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of turbulent flow in stirred tank with a curved blade impeller

Devi

Kumar

2015

J. Engin. Thermophys.

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“…Segundo Hunag & Li (2013) [5] apresentaram uma equação para calcular o termo fonte de quantidade de movimento considerando tanto a força propulsora do impulsor quanto o efeito de atrito radial entre as lâminas e o fluido. O campo de velocidades próximo ao impulsor e no restante do tanque foram comparados com dados experimentais.…”

Section: Introductionunclassified

Comparação entre o modelo de malha móvel e o modelo de fonte de quantidade de movimento para a simulação numérica do princípio de funcionamento de tanques misturadores

et al. 2019

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O presente trabalho tem o intuito de apresentar uma comparação entre dois modelos numéricos capazes de simular o princípio de funcionamento de tanques misturadores, os quais são utilizados em diversas indústrias químicas, entre elas, para a produção de biodiesel. O objetivo é realizar uma comparação entre os resultados obtidos com estes modelos e os resultados encontrados na literatura, a fim de mostrar a capacidade de predição dos modelos desenvolvidos e o esforço computacional de cada um deles. As simulações numéricas foram realizadas utilizando o software FLUENT, baseado no Método de Volumes Finitos (MVF). A comparação dos resultados entre o presente trabalho e dados encontrados na literatura, foi realizada a partir da previsão dos campos de velocidade monitorados no escoamento. Em geral, foi encontrado bom acordo entre os resultados do presente trabalho e resultados da literatura, com relação ao comportamento do escoamento, em determinados pontos que foram analisados no interior do tanque. Foi atestado também, uma grande diferença no tempo e esforço computacional entre os dois modelos numéricos.

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“…Since 80's stirred tank modelling has been enlightened in literature by many research groups such as Issa and Gosman, Harvey and Greaves, Lane et al, Vivek et al, Laakkonen et al, Bai et al, and Huang et al among many others [1][2][3][4][5][6][7]. Liquid mixing is described numerically mainly via two-equation models of RANS family due to affordable computational load.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Interaction between Baffles and Impeller Blades in Stirred Tanks

Gradov

Лаари

Koiranen

2016

MATEC Web of Conferences

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Abstract. In this work, the sensitivity of hydrodynamics on stirrer position is considered when the Multiple Reference Frame technique is applied to simulate mixing tanks of single and multiphase systems. A typical stirred reactor equipped with four baffles and a six blade Rushton turbine was chosen for the studies. Operational conditions of constant speed (5 rps) and 2.653·10-4 m/s gas superficial velocity with single bubble size (1 mm) were set. The reactor was simulated in Fluent 15 with four different impeller blade positions. The results were averaged and validated against experimental data produced by Particle Image Velocimetry. The comparison was made using profiles of velocity components along the sampled lines representing various zones of the vessel. The impeller angle of rotation with respect to baffle position was found to contribute to the overall reactor hydrodynamics especially for multiphase systems. Averaging of the simulation results was found to improve the accuracy of the simulated mixing hydrodynamics.

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CFD Simulation of Flows in Stirred Tank Reactors Through Prediction of Momentum Source

Cited by 16 publications

References 28 publications

Large-eddy simulation of turbulent flow in stirred tank with a curved blade impeller

Large-eddy simulation of turbulent flow in stirred tank with a curved blade impeller

Comparação entre o modelo de malha móvel e o modelo de fonte de quantidade de movimento para a simulação numérica do princípio de funcionamento de tanques misturadores

Assessment of Interaction between Baffles and Impeller Blades in Stirred Tanks

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