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In this study, a numerical simulation was conducted to analyze the hydrodynamics of flow using a dual Rushton impeller, operating at a rotation speed of 550 rpm and a constant flow rate of 0.3 vvm [volume of gas per volume of liquid per minute]. An Eulerian–Eulerian multiphase and turbulence k-ϵ model with a dispersed phase has been applied in ANSYS Fluent 2020R1. Using the population balance model, the hydrodynamic parameter has been focused on bin size air distribution. Multiple frame rotation model will be used for rotation of the impeller, which is good for mixing. Flow behavior has been validated with numerical simulation. The flow behavior near the impeller and the gas hold-up fraction distribution is observed. It is seen that the air-bin size affects the gas hold-up distribution, which enhances the biomass growth in the bioreactor.

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Bubble Distribution Inside Bioreactor by Population Balance Model

  • 会议论文

  • 发表日期：

    2025年

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  • Sachin Kumar,
  • Raj Kumar Singh,
  • Bahni Ray

摘要

In this study, a numerical simulation was conducted to analyze the hydrodynamics of flow using a dual Rushton impeller, operating at a rotation speed of 550 rpm and a constant flow rate of 0.3 vvm [volume of gas per volume of liquid per minute]. An Eulerian–Eulerian multiphase and turbulence k-ϵ model with a dispersed phase has been applied in ANSYS Fluent 2020R1. Using the population balance model, the hydrodynamic parameter has been focused on bin size air distribution. Multiple frame rotation model will be used for rotation of the impeller, which is good for mixing. Flow behavior has been validated with numerical simulation. The flow behavior near the impeller and the gas hold-up fraction distribution is observed. It is seen that the air-bin size affects the gas hold-up distribution, which enhances the biomass growth in the bioreactor.