Phase distribution and turbulence structure for solid/fluid upflow in a pipe

Alajbegovic, Ales; Assad, A.; Bonetto, F.; Lahey, R.T.

doi:10.1016/0301-9322(94)90021-3

Cited by 79 publications

(81 citation statements)

References 14 publications

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“…3(b) clearly shows that the particles tend to accumulate near the centre of the channel. This distribution trend is in qualitative agreement with the results given by Alajbegovic et al (1994Alajbegovic et al ( , 1999 and Hryb et al (2009). Fig.…”

Section: Particle Distributionsupporting

confidence: 82%

Effect of particle clusters on turbulence modulations in liquid flow laden with fine solid particles

Pang

Wei

2011

Braz. J. Chem. Eng.

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-Studies on particle distributions and interactions between the particles and the liquid turbulence are extremely significant and can help to improve efficiency of industrial processes and final product quality. In this paper, the particle distribution and the particle-turbulence interaction in the solid-liquid flow were investigated in detail by a numerical method. The governing equations of the liquid were solved by direct numerical simulations and the particle was tracked by Newtonian motion equations considering the effects of drag force, lift force, pressure gradient force, and virtual mass force. Two-way coupling was used to explain the effect of the particles on the turbulence. The results showed that the vortex has a great influence on the particle distribution. Most of the particles aggregate at the centre of the channel. Particle clusters along the vortex circumference modulate the development of the vortex. The turbulence modulations showed anisotropy. The Reynolds stress is slightly reduced in a broad range; the energy balance is changed; and an extra term is introduced to maintain a new energy balance.

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Section: Particle Distributionsupporting

confidence: 82%

Effect of particle clusters on turbulence modulations in liquid flow laden with fine solid particles

Pang

Wei

2011

Braz. J. Chem. Eng.

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“…In this article, the basic control equations are deduced and the K-e-T model is proposed for dense liquid-solid two-phase turbulent flow. With 520 Wei Jinjia, Hu Chunbo and Jiang Peizheng the model and equations, a numerical simulation of dense liquid-solid two-phase turbulent upflow in a pipe is carried out and the results show a satisfactory agreement with the experimental data of Alajbegovic et al [5].…”

Section: Introductionsupporting

confidence: 63%

“…Alajbegovic et al [5] measured the dense liquid-solid two-phase turbulent up-flow in a pipe simultaneously and got the valuable experimental data. The fluid Reynolds number is 45 000, and the particle volume fraction is 2.41%.…”

Section: Computation Of Pipe Flowmentioning

confidence: 99%

K-ε-T model of dense liquid-solid two-phase turbulent flow and its application to the pipe flow

et al. 2000

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“…Alajbegovic [23] measured the dense liquid-particle two-phase turbulent up-flow in a pipe simultaneously and got the valuable experimental data. Liquid phase is water, particle density is 2450 kg/m 3 , mean velocity of two-phase is 2.02 m/s, particle diameter is 2.32 × 10 −3 m, particle volume fraction is 2.02%, pipe diameter is 3.6 × 10 −2 m, the computation domain is 0.018 m × 2 m, the grid system is 61 × 81.…”

Section: Dense Liquid-particle Two-phase Turbulent Up Flow In Pipementioning

confidence: 99%

“…Finally, the comparison of the two-phase flow of Bingham fluid-particle using present USM-θ model for Bingham fluid and liquid-particle (Alajbegovic [23] ) using turbulence model [7,8] for Newtonian fluid is performed. From Figs.9 to 12, it is found that the fluctuation velocity, mean velocity has remarkable difference.…”

Section: Dense Two-phase Up Flow Of Bingham Fluid With Particles In Pipementioning

confidence: 99%

Second-order moment model for dense two-phase turbulent flow of Bingham fluid with particles

2006

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The USM-θ model of Bingham fluid for dense two-phase turbulent flow was developed, which combines the second-order moment model for two-phase turbulence with the particle kinetic theory for the inter-particle collision. In this model, phases interaction and the extra term of Bingham fluid yield stress are taken into account. An algorithm for USM-θ model in dense two-phase flow was proposed, in which the influence of particle volume fraction is accounted for. This model was used to simulate turbulent flow of Bingham fluid single-phase and dense liquid-particle two-phase in pipe. It is shown USM-θ model has better prediction result than the five-equation model, in which the particle-particle collision is modeled by the particle kinetic theory, while the turbulence of both phase is simulated by the two-equation turbulence model. The USM-θ model was then used to simulate the dense two-phase turbulent up flow of Bingham fluid with particles. With the increasing of the yield stress, the velocities of Bingham and particle decrease near the pipe centre. Comparing the two-phase flow of Bingham-particle with that of liquid-particle, it is found the source term of yield stress has significant effect on flow.

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Phase distribution and turbulence structure for solid/fluid upflow in a pipe

Cited by 79 publications

References 14 publications

Effect of particle clusters on turbulence modulations in liquid flow laden with fine solid particles

Effect of particle clusters on turbulence modulations in liquid flow laden with fine solid particles

K-ε-T model of dense liquid-solid two-phase turbulent flow and its application to the pipe flow

Second-order moment model for dense two-phase turbulent flow of Bingham fluid with particles

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