Computation of pressure drop for dilute gas–solid suspension across thin and thick orifices

Senapati, Santosh Kumar; Dash, Sukanta Kumar

doi:10.1016/j.partic.2020.07.003

Cited by 9 publications

(7 citation statements)

References 26 publications

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“…The expressions for the axial and radial velocity of the gas phase at the inlet of the upstream pipe [28,35,36] are as follows:…”

Section: For the Gas Phasementioning

confidence: 99%

“…However, it is worth mentioning that the initial solution does not affect the final reported results as they correspond to the statistically steady state. [28,29,[35][36][37]…”

Section: The Initial Conditionmentioning

confidence: 99%

“…The present section describes the governing equations briefly for the sake of brevity as these have been well documented in our previous articles. [28,29,[35][36][37]…”

Section: Introductionmentioning

confidence: 99%

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Dilute gas‐particle suspension in a diffuser: A two‐fluid modelling approach

Senapati

Dash

2021

Can J Chem Eng

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The present study evaluates the loss coefficient of a diffuser carrying a gassolid mixture with the volume fraction of the solid in the medium to upper limits of the dilute phase flow (solid volume fraction in the range of 0.005-0.10). In light of the computational analysis, it is observed that an increase in the concentration of the solid phase always helps in overcoming the losses despite a significant dissipation of energy due to collisions. Moreover, the loss coefficient lessens as the solid-phase density reduces. Under the operating conditions where the collisions become significant, a critical particle size (≈200 μm) is obtained. The loss coefficient mitigates gradually with an increase in the particle size up to this value but enhances beyond it. An increase in the diffuser angle enhances the loss; however, its effect becomes less prominent as the solid volume fraction increases (typically for solid volume fraction greater than or equal to 0.02).

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“…The expressions for the axial and radial velocity of the gas phase at the inlet of the upstream pipe [28,35,36] are as follows:…”

Section: For the Gas Phasementioning

confidence: 99%

“…However, it is worth mentioning that the initial solution does not affect the final reported results as they correspond to the statistically steady state. [28,29,[35][36][37]…”

Section: The Initial Conditionmentioning

confidence: 99%

See 1 more Smart Citation

Dilute gas‐particle suspension in a diffuser: A two‐fluid modelling approach

Senapati

Dash

2021

Can J Chem Eng

Self Cite

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“…In general, computational uid dynamics methods and computational uid dynamics-discrete element methods [30] are the main methods for simulating gas-solid two-phase ows in pipes and enclosed devices [31,32]. Their reliability has been veri ed by a large number of experiments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Zhang

Men

Pan

et al. 2022

Preprint

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Purpose: To address the problem of low efficiency of recycling process waste by gas-solid two-phase flow of the shot blasting machine recycling device, a method and structure by increasing the negative pressure value and optimizing the outlet pipe position are proposed. Methods: Computational fluid dynamics (CFD), discrete element method (DEM) and discrete phase model (DPM) were used to study the waste recovery efficiency at different pressure outlet conditions and outlet pipe locations. The validity of the model was verified by velocity tests at the outlet and inlet compared with simulations. The effect of particle size and particle generation rate on solid particle recovery efficiency was further investigated by analyzing the flow field distribution of the recovery unit. The results show that: the maximum velocity of the gas phase in the recovery device increases with the increase of the absolute value of the outlet pressure, when the outlet pressure is -6500 Pa, the maximum velocity is 67.59 m/s. When the absolute value of the outlet pressure is greater than 6000 Pa, a small amount of steel shot particles is discharged from the recovery bin under the action of the outlet pressure, resulting in the loss of steel shot particles. After the outlet pipe position optimization, the steel shot particle recovery efficiency increased by 10% and the waste particle recovery efficiency increased by 18.9%.

show abstract

“…In general, computational fluid dynamics methods and computational fluid dynamics-discrete element methods 30 are the main methods for simulating gas–solid two-phase flows in pipes and enclosed devices 31 , 32 . Their reliability has been verified by a large number of experiments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of gas–solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Zhang

Men

et al. 2022

Sci Rep

View full text Add to dashboard Cite

To address the problem of low efficiency of recycling process waste by gas–solid two-phase flow of the shot blasting machine recycling device, a method and structure by increasing the negative pressure value and optimizing the outlet pipe position are proposed. Computational fluid dynamics (CFD), discrete element method (DEM) and discrete phase model (DPM) were used to study the waste recovery efficiency at different pressure outlet conditions and outlet pipe locations. The validity of the model was verified by velocity tests at the outlet and inlet compared with simulations. The effect of particle size and particle generation rate on solid particle recovery efficiency was further investigated by analyzing the flow field distribution of the recovery unit. The results show that the maximum velocity of the gas phase in the recovery device increases with the increase of the absolute value of the outlet pressure, when the outlet pressure is -6500 Pa, the maximum velocity is 67.59 m/s. When the absolute value of the outlet pressure is greater than 6000 Pa, a small amount of steel shot particles is discharged from the recovery bin under the action of the outlet pressure, resulting in the loss of steel shot particles. After the outlet pipe position optimization, the steel shot particle recovery efficiency increased by 10% and the waste particle recovery efficiency increased by 18.9%.

show abstract

Computation of pressure drop for dilute gas–solid suspension across thin and thick orifices

Cited by 9 publications

References 26 publications

Dilute gas‐particle suspension in a diffuser: A two‐fluid modelling approach

Dilute gas‐particle suspension in a diffuser: A two‐fluid modelling approach

Analysis of gas-solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

Analysis of gas–solid two-phase flow and structure optimization of mobile shot blasting machine recovery device

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