Mixing simulation of a viscous Newtonian liquid in a twin sigma blade mixer

Connelly, Robin K.; Kokini, Jozef L.

doi:10.1002/aic.10960

Cited by 42 publications

(26 citation statements)

References 28 publications

(35 reference statements)

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“…A particle-tracking analysis of mixing using the full range of positions in this mixer during three blade cycles with the Newtonian corn syrup model shows the applicability of these general observations for the full range of motion. 29 The comparisons with the experimental LDA work of Prakash and Kokini 6−9 give some limited validation of the order of magnitude of the velocity as well as the flow and shearing patterns seen in the simulation results, but more work is needed to refine both the simulation results and the experimental results before the validity of the simulation results using the specified material properties can be properly assessed.…”

Section: Discussionmentioning

confidence: 94%

3D numerical simulation of the flow of viscous newtonian and shear thinning fluids in a twin sigma blade mixer

Connelly

Kokini

2006

Adv Polym Technol

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ABSTRACT:The flow and mixing in a 3D geometrically accurate representation of a twin sigma blade mixer is simulated using the finite element method (FEM) combined with the mesh superimposition technique as implemented by Polyflow (Fluent, Inc.) to calculate the velocity, velocity gradients, shear rates, and mixing index. The mixing conditions and material models are based on those used in the laser-Doppler anemometry (LDA) experiments of Prakash and Kokini. The simulation results are analyzed to determine the effect of increasing shear thinning on the flow and mixing, and are also compared with the experimental results of Prakash and Kokini for the This is publication no. NJAES D10544-3-05 of the New Jersey Agricultural Experiment Station.

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Section: Discussionmentioning

confidence: 94%

3D numerical simulation of the flow of viscous newtonian and shear thinning fluids in a twin sigma blade mixer

Connelly

Kokini

2006

Adv Polym Technol

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“…This method has been used in Polyflow (ANSYS) to model the flow of a viscous fluid in a twinscrew extruder in two dimensions [10] and in three dimensions [11]. More recently, Connelly and Kokini [12] used the MST to simulate the three-dimensional flow of a viscous fluid in a sigma blade mixer.…”

Section: Introductionmentioning

confidence: 99%

“…The Lagrange multiplier h ∈ h is discretized using Dirac shape functions following Bertrand et al [2]. The system of Equations (10)- (12) can be solved by means of different techniques.…”

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confidence: 99%

A fast and robust fictitious domain method for modelling viscous flows in complex mixers: The example of propellant make‐down

Coesnon

Heniche

Devals

et al. 2008

Numerical Methods in Fluids

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SUMMARYThis work deals with the development of a fast three-dimensional numerical strategy for the simulation of viscous fluid flow in complex mixing systems. The proposed method is based on a distributed Lagrange multiplier fictitious domain method and the use of the low-cost MINI finite element. Contrary to the previous fictitious domain method developed by our group a few years ago, the underlying partial differential equations are solved here in a coupled manner using a consistent penalty technique. The method is discussed in detail and its precision is assessed by means of experimental data in the case of an agitated vessel. A comparison made with our existing fictitious domain method and its decoupled Uzawa-based solver clearly shows the advantages of resorting to the MINI finite element and fully coupled solution strategy. The new technique is then applied to the simulation of the flow of a Newtonian viscous fluid in a three-blade planetary mixer in the context of the production of solid propellants.

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“…A substantial amount of simulation work on internal mixer has been conducted by various researchers. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] Bai and Sundararaj 10 studied the transient temperature development due to viscous dissipation inside an internal batch mixer, using 3D nonisothermal CFD modeling. Salahudeen et al 14 performed simulation work on an miniature internal mixer to compare the mixing efficiency of various rotor geometries such as cam, Banbury rotors, and roller.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of flow of rubber compounds in partially filled internal mixer

Liu

Zhang

et al. 2015

J of Applied Polymer Sci

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Most numerical simulations of the flow in an internal mixer are based on the assumption that the internal mixer is totally filled with rubber compounds. However, in fact, the internal mixers are only partially filled with rubber compounds, thus posing many challenges for researchers in simulating the flow in the internal mixer. In this study, the volume of fluid method and the dynamic mesh technology of commercial CFD software FLUENT were used to simulate the flow of rubber compound in a partially filled internal mixer. To improve simulation accuracy, every 18 degrees in circumferential direction, we manually re‐meshed the calculated transient location of the rubber compound. Thus, we obtained the transient distribution of the rubber compound in the internal mixer as the rotors rotated. The simulation results showed that voids were mainly located behind the rotor blades, and there were material exchanges in the bridge regions between the two chambers. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42496.

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Mixing simulation of a viscous Newtonian liquid in a twin sigma blade mixer

Cited by 42 publications

References 28 publications

3D numerical simulation of the flow of viscous newtonian and shear thinning fluids in a twin sigma blade mixer

3D numerical simulation of the flow of viscous newtonian and shear thinning fluids in a twin sigma blade mixer

A fast and robust fictitious domain method for modelling viscous flows in complex mixers: The example of propellant make‐down

Numerical simulation of flow of rubber compounds in partially filled internal mixer

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