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Numerical Simulation Research of Bubble Characteristics and Bubble Departure Diameter in Subcooled Flow Boiling

Author

Listed:
  • Jinfeng Wang

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
    Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
    National Experimental Teaching Demonstration Center for Food Science and Engineering, Shanghai Ocean University, Shanghai 201306, China
    Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment, Ministry of Agriculture, Shanghai 201306, China)

  • Bingjun Wang

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
    Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
    These authors contributed equally to this work.)

  • Jing Xie

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
    Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China
    National Experimental Teaching Demonstration Center for Food Science and Engineering, Shanghai Ocean University, Shanghai 201306, China
    Quality Supervision, Inspection and Testing Center for Cold Storage and Refrigeration Equipment, Ministry of Agriculture, Shanghai 201306, China)

  • Ke Lei

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China)

  • Bo Yu

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China)

  • Yuhang Sun

    (College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China)

Abstract

Three-dimensional subcooled flow boiling of R134a in a horizontal tube was simulated by a VOF (volume of fluid) model combined with the level set method. Bubble characteristics were explored at heat flux of 0.3 MW/m 2 , inlet subcooling of 3 K, and inlet velocity of 0.4 m/s. It was observed that five representative bubbles occurred in subcooled flow boiling, including sliding bubble, coalescing bubble, non-departed bubble, bouncing bubble, and continuous-boiling bubble. The results showed that the bubble radial velocity was an important factor of bubble departure after a sliding process. Moreover, the effect of heat flux, inlet velocity, and inlet subcooling on bubble departure diameter were investigated. The departure diameter increased with increasing inlet velocity from 0.2 to 0.4 m/s and heat flux from 0.2 to 0.4 MW/m 2 , while diameter decreased with inlet subcooling from 3 to 10 K. Finally, based on the influence of heat flux, inlet velocity, and inlet subcooling on average departure diameter of the bubble except the coalescing bubble, a model was proposed to predict the average departure diameter. The deviation of the model was within 5%.

Suggested Citation

  • Jinfeng Wang & Bingjun Wang & Jing Xie & Ke Lei & Bo Yu & Yuhang Sun, 2022. "Numerical Simulation Research of Bubble Characteristics and Bubble Departure Diameter in Subcooled Flow Boiling," Mathematics, MDPI, vol. 10(21), pages 1-22, November.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:21:p:4103-:d:962492
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    Citations

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    Cited by:

    1. Bo Yu & Jinfeng Wang & Jing Xie & Bingjun Wang & Fei Wang & Meng Deng, 2023. "Bubble Sliding Characteristics and Dynamics of R134a during Subcooled Boiling Flow in a Narrow Gap," Mathematics, MDPI, vol. 11(9), pages 1-23, May.
    2. Ke Lei & Jinfeng Wang & Jing Xie & Bingjun Wang, 2023. "Numerical Simulation of Subcooled Flow Boiling in a Threaded Tube and Investigation of Heat Transfer and Bubble Behavior," Energies, MDPI, vol. 16(15), pages 1-19, July.

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