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International journal of heat and mass transfer v.121, 2018년, pp.1229 - 1233   SCI SCIE
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Effect of contact angle on flow boiling in vertical ducts: A pseudo-potential MRT-thermal LB coupled study

Sun, Tingzhen (Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, PR China ) ; Gui, Nan (Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, PR China ) ; Yang, Xingtuan (Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, PR China ) ; Tu, Jiyuan (Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, PR Chin ) ; Jiang, Shengyao ;
  • 초록  

    Abstract The influence of dynamic contact angle on flow boiling in vertical ducts is investigated based on the phase-change lattice Boltzmann method (LBM). To verify the correctness of the model, the surface tension of bubbles is calculated by the Laplace law and compared with the actual values. The influence of different contact angle on flow boiling is discussed. The mechanisms of bubble growth time and bubble waiting time on different contact angle surfaces are discussed. The heat transfer coefficient of different surfaces is investigated. The simulation results show that the boiling heat transfer characteristics on hydrophilic surface is better than that on hydrophobic surface. Highlights The influence of dynamic contact angle on flow boiling is investigated. Bubble behaviors on different surfaces are captured. The heat transfer of different surfaces is compared.


  • 주제어

    Pseudo-potential .   Lattice Boltzmann .   Flow boiling .   Contact angle .   Boiling heat transfer .   Vertical duct.  

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