The simulation results show that the impeller speed only affects the mixing process and does not change the mixing uniformity; the fill level has a significant effect on the particle mixing, and a higher fill level will inhibit the particle mixing; based on the uniform mixing, the fill level has little effect on the total power consumption per ...
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Gu et al. [20] applied CFD simulation to optimize impeller speed, flexible connection piece length, impeller spacing and aperture size/ratio of punched rigid-flexible impeller in the …
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This method allows for efficient steady state flow simulation in a mixer with a rotating impeller. Moreover, MRF is also considered to be an adequate and quasi-steady state approach [ 11 ]. To model the rotation of the impeller, the entire vessel was divided into two regions: the moving zone and the tank volume.
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3.3 Velocity The velocity contour captured by cross-section view Y-Z in the center of tanks as shown in Figure 3.3. The vortex observed in unbaffled tank reached to blade 2 compared to baffled tank.
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Compared the flow structure and mixing effect of four impeller systems by numerical simulation. The distribution and motion behavior of desulfurizer particles are further discussed.
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Rotationally reciprocating mixing, in which a plate impeller slowly rotates back and forth for only half a rotation, shows excellent fluid mixing performance at Re > 40. On the other hand, since vertical flow disappears at Re < 10, two-dimensional fluid mixing proceeds in the horizontal cross section of a cylindrical vessel, producing segmented mixing regions with a …
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The effect of fluid flow and impeller characteristics on the mixing behavior of the reactor via. The continuous Stirred tank reactor (CSTR) is a process equipment frequently used in the chemical, food and pharmaceutical engineering related industries. ... (JMESS) ISSN: 2458-925X Vol. 2 Issue 10, October - 2016 CFD Simulation of Mixing Effect on ...
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Simulation Monitoring – User can now monitor convergence by monitoring the residuals or the torque on the impeller and species concentration while the simulation is in progress. Powerful Reports and Visualization tool
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The dual shaft mixer strengthened the hydrodynamic interaction between impellers through increasing left impeller off-bottom height C 2 (as shown in Fig. S2 (C 2 /H = 0.3–0.7)), enhanced the instability of flow field and destroyed local circulation structure in the upper part of tank, resulting in more unstable flow field and higher mixing ...
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Transform mixing processes with MixIT, leveraging advanced real-time data integration and 3D CFD models for enhanced stirred tank analysis and scalability. ... MixIT provides comprehensive simulation and analysis features and functionality to optimize reactor performance. ... Predict the shape and depth of impeller vortices for different ...
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the mixing tank using Euler−Euler numerical simulation and the particle image velocimetry (PIV) experimental method. The three- ... In multi-impeller mixing systems, the operating parameters and geometric configurationof the mixing tank can dramatically affect the hydraulic performance, mixing performance, and ...
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impeller shaft 7 is carried out by means of a chain compensating clutch. Impeller shaft has three supports 4 - directly under the portal, 5 - in the intermediate section of the shaft, with support on the tank wall 6, 8 - hub, installed on the tank bottom. The mixing process is initiated by the mixing device (impeller) the mutual movement of
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Discover capabilities for performing a variety of fluid mixing simulations. The Mixer Module contains flexible and robust modeling interfaces for describing fluid flow in tanks with rotating …
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The aim of this article is to identify an appropriate approach for impeller mixing performance prediction with respect to accuracy and efficiency, and the potential to apply it in further optimization studies. ... From the …
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This tutorial example simulates the flow in a flat bottom mixer containing, agitated by a pitched four blade impeller, where the fluid is water, and flow is assumed to be turbulent. The flow in the mixer is modeled using the k-ε turbulence model, and a time-dependent simulation ...
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Further comparing shear stress/rate of helical ribbon with that of impeller A-310, a different mixing mechanism for helical ribbon and impeller A-310 can be revealed. Impeller A-310 had relatively small wall shear stress but a large shear rate. It …
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To further reduce the power consumption and improve the mixing performance of stirred tanks, two improved disc turbines, swept-back parabolic disc turbine (SPDT) and staggered fan-shaped parabolic disc turbine (SFPDT), are developed in this work, and their flow and mixing characteristics in a dished bottom stirred tank at various Reynolds numbers (Re = …
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Mixing in highly viscous and non-Newtonian media. ... • double-impeller mixing systems • homogenizing, macro- and micro-mixing ... VisiXcel: VisiMix Itd. Mixing Simulation software for Chemical and Process Engineers. P.O. Box 45170 Jerusalem, Israel 9145101 Tel: + Tel: +9725870123 Fax:+972-1532-5870206
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After validation of computational fluid dynamics (CFD) model with experimental results, CFD simulations are carried out to study the flow pattern, mean velocity, power …
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The trace species is added when the mixer is running in steady operation. The mixing time is evaluated by comparing the concentration in a measurement point to the average concentration in the vessel. Model Definition MODEL GEOMETRY Figure 1 shows the model geometry, which is a schematic cross section of a tank with a four-blade impeller.
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The present study is aimed at finding a more detailed information on the effect of four different pitched blade impellers, including 15°, 30°, 45° and 60° impellers in the mixing …
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Flow interferences occur in the dual-impeller stirred tank between paddles as well as between paddles and baffles and the tank wall, leading to inefficient utilization of the stirring energy. To address this issue, this study investigates the flow characteristics within the mixing tank using Euler–Euler numerical simulation and the particle image velocimetry (PIV) experimental …
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The goal of this article is to provide a method for simulating and analyzing impeller mixing and gas sparging in a bioreactor using multiphase computational fluid dynamics modeling. In particular, the oxygen transfer rate, ... The top impeller mesh from run 2 was used—except in simulation 3, which used the top impeller mesh from run 3.
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In this part of review, CFD simulations of radial flow impellers (mainly disc turbine (DT)) in a fully baffled vessel operating in a turbulent regime have been presented.
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An impeller is a rotating component designed to transfer energy from the motor to the fluid, increasing its velocity and pressure. ... Role of Engineering Simulation in Impeller Design. Simulating and evaluating a pump impeller early in the design process is crucial for determining the optimal design. However, traditional on-premises simulation ...
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Stirred vessels are considered as the essential equipment in chemical and process industries. This research aims to simulate the impact of 33 distinct impeller designs on the mixing quality of ...
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In this tutorial, we will demonstrate how to use Dynamic Mesh to model rotating components. We will simulate the rotation of an impeller in a cylindrical tank partially filled with water. The …
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A hybrid method for the simulation of Reynolds-averaged turbulent flows in axial flow impeller driven mixing vessels is described. The time-mean flow in the impeller region is modelled using blade element theory, while the flow in the remainder of the vessel is simulated using a second-order finite-volume Reynolds-averaged numerical scheme.
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aims to simulate the impact of 33 distinct impeller designs on the mixing quality of solid–liquid stirred vessels in terms of solid cloud volume by the CFD technique.
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Simulation of the mixer generated motion in the anaerobic digester Simulations were realized for the sludge flow in the geometry shown in ... of the impeller used for mixing the sludge is 0.5 m. The impeller is located 13 m from the ground level of the anaerobic digester.
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