PIV experiments and large eddy simulations of single-loop flow fields in Rushton turbine stirred tanks

Li, Zhipeng; Bao, Yuyun; Gao, Zhengming

doi:10.1016/j.ces.2010.12.024

Cited by 90 publications

(71 citation statements)

References 38 publications

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“…The main parameters of data points are summarised in table 1 for LDA measurements (3 points) and in table 2 for PIV measurements (2 points). , [3]. The effect of low frequencies did not occur, probably, because the measurements were performed in vicinity of the impeller, where the velocity is high enough.…”

Section: Resultsmentioning

confidence: 99%

“…Although the development of mixing processes is nowadays based mostly on CFD (Computational Fluid Dynamics) where the LES (Large Eddy Simulation) approach is commonly used e.g. [1], [2], [3], [4], [5], the DNS (Direct Numerical Simulation) approach is also under development [6]. The large part of published results in this field were summarised in [7], [8].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and accuracy of the local velocity data measurements in an agitated vessel

Kysela

Konfršt

Chára

et al. 2014

EPJ Web of Conferences

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Abstract. Velocity measurements of the flow field in an agitated vessel are necessary for the improvement and better understanding of the mixing processes. The obtained results are used for the calculations of the impeller pumping capacity, comparison of the power consumption etc. We performed various measurements of the local velocities in an agitated vessel final results of which should be processed for several purposes so it was necessary to make an analysis of the obtained data suitability and their quality. Analysed velocity data were obtained from the LDA (Laser Doppler Anemometry) and PIV (Particle Image Velocimetry) measurements performed on a standard equipment where the flat bottomed vessel with four baffles was agitated by the six-blade Rushton turbine. The results from both used methods were compared. The frequency analyses were examined as well as the dependency of the data rates, time series lengths etc. The demands for the data processed in the form of the ensemble-averaged results were also established.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation and accuracy of the local velocity data measurements in an agitated vessel

Kysela

Konfršt

Chára

et al. 2014

EPJ Web of Conferences

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“…The relative error between the simulated and measured velocities along Line 1 and Line 2 was 4.75% and 7.59%, respectively. This error is acceptable; [12][13][14] therefore, the RNG k À e turbulent model and the adopted numerical method have the capability to predict the turbulent flow in the mechanical clarifier process.…”

Section: Comparison Between Experimental and Simulated Resultsmentioning

confidence: 99%

Optimization of mechanical accelerated clarifier based on numerical simulation of flow field

Wang

2017

Advances in Mechanical Engineering

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In this article, the numerical simulation of a mechanical mixing process typical of that in water treatment has been performed and optimization of process parameters is achieved. First, the prediction capability of the numerical calculation method is verified through laboratory experiments. Then, the index of turbulence intensity and mixing effect is presented. Finally, optimization of design and operational parameters is carried out based on the maximization of two indices while minimizing power consumption in an actual water treatment plant. The results have shown that the nature of the flow field has a strong influence on the mixing effect. Moreover, the index of turbulence intensity and mixing effect was shown to provide a feasible approach to the optimization of design and operational parameters. For the mechanical accelerated clarifier in the actual water treatment plant, the optimal paddle diameter, submerged depth, and rotational speed were 0.8 m, 1.25 m, and 40 r/min, respectively.

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“…breakup of drops, bubbles or suspension of solid particles. There are numerous papers focused on investigations/measurements of flow generated by the Rushton turbine in the literature [3][4][5]. In their experiments, the authors used different, usually advanced research techniques, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In their experiments, the authors used different, usually advanced research techniques, e.g. CFD modelling [3], Particle Image Velocimetry (PIV) [4] or Laser Doppler Anemometry (LDA) [5]. However, most of these experiments were conducted in standard mixing vessels equipped with baffles of a standard design and geometry.…”

Section: Introductionmentioning

confidence: 99%

The performance of the rushton turbine eccentrically positioned in a mixing vessel. Part I: the qualitative CFD analysis

Wójtowicz

Lipin

2017

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The performance of the rushton turbine eccentrically positioned in a mixing vessel. StreszczeniePrzeprowadzono jakościową analizę przepływu cieczy generowanego przez mieszadło turbinowe tarczowe Rushtona, usytułowane ekscentrycznie w mieszalniku bez przegród. Na podstawie symulacji numerycznych CFD określano wpływ położenia mieszadła w zbiorniku na wybrane parametry przepływu, tj. model przepływu, rozkłady prędkości cieczy czy też parametry burzliwości. Dane symulacyjne opracowano w postaci grafik wizualizacyjnych oraz wektorowych i konturowych map rozkładu, tworzonych w oparciu o różne kryteria wizualizacji przepływu. Uzyskane wyniki mogą być wykorzystane podczas konstruowania i optymalizacji aparatów z mieszadłami stosowanych w warunkach przemysłowych.Słowa kluczowe: mieszanie, mieszadło turbinowe Rushtona, niecentryczność mieszadła, przepływ cieczy, symulacje CFD

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PIV experiments and large eddy simulations of single-loop flow fields in Rushton turbine stirred tanks

Cited by 90 publications

References 38 publications

Evaluation and accuracy of the local velocity data measurements in an agitated vessel

Evaluation and accuracy of the local velocity data measurements in an agitated vessel

Optimization of mechanical accelerated clarifier based on numerical simulation of flow field

The performance of the rushton turbine eccentrically positioned in a mixing vessel. Part I: the qualitative CFD analysis

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