CFD Investigation of the Mixing of Yield‐Pseudoplastic Fluids with Anchor Impellers

Prajapati, Poonam; Ein‐Mozaffari, Farhad

doi:10.1002/ceat.200800511

Cited by 56 publications

(27 citation statements)

References 37 publications

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“…Since application of the experimental techniques are usually time-consuming and costly, some researchers have utilised the computational fluid dynamics (CFD) approach to evaluate the mixing performance (Jaworski et al, 2000;Bujalski et al, 2002;Kukukova et al, 2005;Buwa et al, 2006;Ihejirika and Ein-Mozaffari, 2007;Ein-Mozaffari and Upreti, 2009;Prajapati and Ein-Mozaffari, 2009;Zadghaffari et al, 2009). However, CFD results are not reliable unless the model is validated using the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of the mixing of non‐newtonian fluids with a scaba 6SRGT impeller through ert and CFD

et al. 2011

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An attempt has been made to study the mixing of yield-pseudoplastic fluids with a Scaba 6SRGT impeller using electrical resistance tomography (ERT) and computational fluid dynamics (CFD). The ERT system with four sensor planes, each containing 16 equispaced stainless steel electrodes, was used to measure the mixing time. The multiple reference frames (MRF) technique and the modified Herschel-Bulkley model were applied to simulate the impeller rotation and the rheological behaviour of the non-Newtonian fluids, respectively. To validate the model, the CFD results for the power consumption were compared to the experimental data. The validated model was then employed to obtain further information regarding the averaged impeller shear rate, impeller circulation, and pumping capacities. The CFD and ERT data were utilised to investigate the effect of the impeller power, fluid rheology, and impeller size on the mixing time. The mixing time results obtained in this study were in good agreement with those reported in the literature.

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Section: Introductionmentioning

confidence: 99%

Characterisation of the mixing of non‐newtonian fluids with a scaba 6SRGT impeller through ert and CFD

et al. 2011

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“…In order to overcome such discontinuity, the standard HerschelBulkley model can be modified as [23] Real interface…”

Section: Modified Herschel-bulkley Modelmentioning

confidence: 99%

3D Simulation of Self‐Compacting Concrete Flow Based on MRT‐LBM

Qiu

Han

2018

Advances in Materials Science and Engineering

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A three-dimensional multiple-relaxation-time lattice Boltzmann method (MRT-LBM) with a D3Q27 discrete velocity model is applied for simulation of self-compacting concrete (SCC) flows. In the present study, the SCC is assumed as a non-Newtonian fluid, and a modified Herschel-Bulkley model is used as constitutive mode. e mass tracking algorithm was used for modeling the liquid-gas interface. Two numerical examples of the slump test and enhanced L-box test were performed, and the calculated results are compared with available experiments in literatures. e numerical results demonstrate the capability of the proposed MRT-LBM in modeling of self-compacting concrete flows.

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“…Therefore, pseudoplasticity become the basic reason of determining some mixing parameters such as impeller geometry, numbers of impellers, mixing time, impeller speed, type and maximum power of mixer. The optimation of those parameters leads to a better mixing performance [13], [14], [15], [16], [17] .…”

Section: Introductionmentioning

confidence: 99%

Pseudoplasticity of Propellant Slurry with Varied Aluminium Content for Castability Development

Restasari

Budi

Hartaya

2018

J. Phys.: Conf. Ser.

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Abstract. The modification of the percentage of aluminium is necessary to obtain certain specific impulse. But, it affects the pseudoplasticity of propellant in elapsed time that is important in casting. Therefore, this research attempts to investigate the pseudoplasticity of propellant slurry with varied aluminium contents and as time elapsed, the range of percentage of aluminium and time that allows propellant slurry to be well processed. The methods include measuring the viscosity of propellant slurries that contain 6, 8, 10, 12, 14, 16 and 18% of aluminium at varied shear rates until 40 minutes after mixing by using Brookfield viscometer. The graphs of viscosity versus shear rate were made to determine pseudoplasticity index. After that, the graph volume fraction versus pseudoplasticity index were made to be investigated. It is concluded that the more aluminium contents, the slurries with 6 to 12% aluminium contents exhibit more pseudoplastic behaviour, but the slurries with 12 to 16% aluminium exhibit less pseudoplastic. While, slurry of 18% aluminium exhibit high pseudoplasticity. In the correlation with the time, the slurry compositions of 6, 8, 14, 16% aluminium become more pseudoplastic as time elapsed. While, for compositions of 10, 12 and 18% aluminium, the trend becomes contrary. Based on the pseudoplasticity index, propellant slurries that contain 10 and 14% of aluminium are suitable for pressure casting. While for slurries with 6, 8 and 16% of aluminium are also suitable for vacuum casting. All of those suitability are possesed until 40 minutes after mixing. While, the composition of slurries that contain 12 and 18% of aluminium need to be modified to enhanced its castability.

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CFD Investigation of the Mixing of Yield‐Pseudoplastic Fluids with Anchor Impellers

Cited by 56 publications

References 37 publications

Characterisation of the mixing of non‐newtonian fluids with a scaba 6SRGT impeller through ert and CFD

Characterisation of the mixing of non‐newtonian fluids with a scaba 6SRGT impeller through ert and CFD

3D Simulation of Self‐Compacting Concrete Flow Based on MRT‐LBM

Pseudoplasticity of Propellant Slurry with Varied Aluminium Content for Castability Development

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