Comparative study of internal batch mixer such as cam, banbury and roller: Numerical simulation and experimental verification

Salahudeen, Shafaat Ahmed; Elleithy, Rabeh; Alothman, Othman Y.; Al-Zahrani, S.M.

doi:10.1016/j.ces.2011.02.017

Cited by 39 publications

(24 citation statements)

References 16 publications

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“…The flow pattern around the mixing zone is determined by the angle of the rotor. We found in our earlier studies21 that mixing does not occur at all times in the mixing zone, but rather it occurs at specific positions of the rotors. The angle at which polymer melt is interchanged between the mixing chambers is termed as mixing angle.…”

Section: Resultsmentioning

confidence: 64%

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Salahudeen

Alothman

Elleithy

et al. 2012

J of Applied Polymer Sci

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Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer has been investigated using polymer melt. A practical optimization technique was followed for optimization. Four different rotor speeds were used and characterized numerically with viscous dissipation and stretching. The heat distribution between rotor edge and mixer wall was calculated. Stretching experienced by the fluid was analyzed and the result was verified experimentally using particle tracking method. Exponential increase of energy dissipation between the rotor edge and the barrel at higher speed highlighted the importance of choosing the thermal properties of the polymer to avoid thermal degradation.

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Section: Resultsmentioning

confidence: 64%

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Salahudeen

Alothman

Elleithy

et al. 2012

J of Applied Polymer Sci

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“…For the unsymmetrical rotational speeds such as 30:10 r/min and 30:20 r/min, the temperature values of reactive fluid in the left half channel is higher than those in the right half channel because of the high rotational speed of left rotor. According to the Arrhenius law in equation (12), when the pre-exponential factor k 0 , the activation energy E a and the gas constant R are constants, the reactive rate increases with the increase of the absolute temperature. Therefore, the concentration of TiO 2 is higher in the left half channel than right half channel.…”

Section: Effect Of Rotational Speed Ratios On the Reaction Ratementioning

confidence: 99%

Numerical study of reaction process for preparing PP/TiO₂ nanocomposites in an internal batch mixer

Zhu

Sun

2014

Journal of Reinforced Plastics and Composites

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When the nanosize particles of titanium dioxide (TiO 2 ) are well dispersed into the polypropylene (PP) matrix, the inorganic nanocomposites, PP/TiO 2 , has more significant material properties than the net PP polymer. Based on the finite element method, the sol-gel reaction process of preparation PP/TiO 2 nanocomposites in an internal batch mixer with Haake rotors was simulated with user defined functions (UDFs) of Polyflow software. In order to better understand the effect of chaotic flow strength induced by asymmetric flow field on the reaction rate, the Poincaré maps, the line stretch and stretching mixing efficiency in the batch mixer were calculated under different speed ratios. Moreover, the effects of rotor speed ratio, temperature rise by viscous heating, and precursor concentration on the overall conversion rates in the mixer were discussed, respectively. Especially, the effect of chaotic strength by different speed ratios on the part and overall reaction rate within the mixer were carried out. It is found that the chaotic mixing intensity and average conversion rate increase gradually with the increase of the speed ratios in the mixer. Interestingly, the greater the intensity of the chaotic flow field in the internal mixer, the more sensitive of the average conversion rate to the temperature rise.

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“…Bai and Sundararaj studied the transient temperature development due to viscous dissipation inside an internal batch mixer, using 3D nonisothermal CFD modeling. Salahudeen et al . 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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Comparative study of internal batch mixer such as cam, banbury and roller: Numerical simulation and experimental verification

Cited by 39 publications

References 16 publications

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Numerical study of reaction process for preparing PP/TiO₂ nanocomposites in an internal batch mixer

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

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Comparative study of internal batch mixer such as cam, banbury and roller: Numerical simulation and experimental verification

Cited by 39 publications

References 16 publications

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Optimization of rotor speed based on stretching, efficiency, and viscous heating in nonintermeshing internal batch mixer: Simulation and experimental verification

Numerical study of reaction process for preparing PP/TiO2 nanocomposites in an internal batch mixer

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

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Numerical study of reaction process for preparing PP/TiO₂ nanocomposites in an internal batch mixer