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Investigation of flow distribution in multiple microchannels

Investigation of flow distribution in multiple microchannels. Reporter: Zhang Weihua Supervisor: Professor Xin Feng. Contents. I Preliminary ideas. 1 . Explore the specified diameter obtained based on simulation and experiment results, when acceptable distribute performance

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Investigation of flow distribution in multiple microchannels

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  1. Investigation of flow distribution in multiple microchannels Reporter: Zhang Weihua Supervisor: Professor XinFeng

  2. Contents

  3. I Preliminary ideas 1. Explore the specified diameter obtained based on simulation and experiment results, when acceptable distribute performance 2. Search for possible regular pattern from single channel to multiple channels via probabilistic model 3. Propose advisable dividing line between microchannel and macrochannel

  4. II Simulate or not? CFD simulation was laid aside due to unsatisfying grid and low performance PC Necessity of CFD simulation: asymmetry structure, radial nonuniformity

  5. III Experiment methods CT MRI Liquid collecting method Micro-conductivity probe …… ShantanuRoy. Experimental investigation of gas–liquid distribution in monolith reactors. Chemical Engineering Science 62 (2007) 7463 – 7470.

  6. III Experiment methods W. Cai et al. Experimental Investigation of Gas Holdup and Slug Lengths in an UpflowMonolith Reactor. Chem. Eng. Technol. 2011, 34, No. 6, 955–962.

  7. III Experiment methods W. Cai et al. Experimental Investigation of Gas Holdup and Slug Lengths in an UpflowMonolith Reactor. Chem. Eng. Technol. 2011, 34, No. 6, 955–962.

  8. III Experiment methods W. Cai et al. Experimental Investigation of Gas Holdup and Slug Lengths in an UpflowMonolith Reactor. Chem. Eng. Technol. 2011, 34, No. 6, 955–962.

  9. III Experiment methods Some places to be improved: 1 Narrow adaptable intervals 2 Dependency on light source 3 Deviation existing in estimation of film thickness and measuring of bubble diameter 4 Randomly picked 5 channels to represent overall performance W. Cai et al. Experimental Investigation of Gas Holdup and Slug Lengths in an UpflowMonolith Reactor. Chem. Eng. Technol. 2011, 34, No. 6, 955–962.

  10. III Experiment methods Questions list

  11. III Experiment methods Parameters preferred: Monolith element diameter: 10mm Monolith element length: 50 mm Channel diameter: 0.1-1mm Superficial velocity: ug 0.08m/s, ul 0.1m/s Sample time: 100 periods Sample channel number: tmtb

  12. III Experiment methods ｛ h

  13. IV Further plan • Jul to Aug: Experiment • Sep to Oct: CFD simulation • Simulate multichannel cases by Monte Carlo or Chaotic Theories? • Proposal of dividing line

  14. Thank you ！ Danke

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