TY - JOUR
T1 - Dilute gas-particle suspension in a diffuser
T2 - A two-fluid modelling approach
AU - Senapati, Santosh Kumar
AU - Dash, Sukanta Kumar
N1 - Funding Information:
The authors acknowledge the Indian Institute of Technology Kharagpur, India, for providing access to laboratory, library, and ANSYS Fluent tool.
Publisher Copyright:
© 2021 Canadian Society for Chemical Engineering.
PY - 2022/4
Y1 - 2022/4
N2 - The present study evaluates the loss coefficient of a diffuser carrying a gas–solid 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).
AB - The present study evaluates the loss coefficient of a diffuser carrying a gas–solid 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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U2 - 10.1002/cjce.24131
DO - 10.1002/cjce.24131
M3 - Article
AN - SCOPUS:85106220697
SN - 0008-4034
VL - 100
SP - S72-S93
JO - Canadian Journal of Chemical Engineering
JF - Canadian Journal of Chemical Engineering
IS - S1
ER -