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  • Open Access

    ARTICLE

    Boiling Dynamics and Entropy Generation in Inclined Tubular Systems: Analysis and Optimization

    Hao Tang1,2,3, Jianchang Yang1,2,3, Yunxin Zhou1,2,3, Jianxin Xu1,2,3,*, Hua Wang1,2,3

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.7, pp. 1571-1600, 2025, DOI:10.32604/fdmp.2025.063741 - 31 July 2025

    Abstract This research explores the characteristics of boiling in inclined pipes, a domain of great importance in engineering. Employing an experimental visualization technique, the boiling dynamics of deionized water are examined at varying inclination angles, paying special attention to the emerging flow patterns. The findings demonstrate that the inclination angle significantly impacts flow pattern transitions within the 0° to 90° range. As the heat flux rises, bubbles form in the liquid. The liquid’s inertia extends the bubble-wall contact time, thereby delaying the onset of bulk bubble flow. Beyond a 90° inclination, however, the patterning behavior is… More > Graphic Abstract

    Boiling Dynamics and Entropy Generation in Inclined Tubular Systems: Analysis and Optimization

  • Open Access

    ARTICLE

    ALGORITHM AND INFLUENCE FACTOR STUDY ON FLOW PATTERN TRANSITION FROM STRATIFIED FLOW TO NON-STRATIFIED FLOW OF GAS-LIQUID TWO-PHASE FLOW

    Rongge Xiaoa,*, Dong Wanga, Shuaishuai Jina, Hongping Yub, Bo Liua

    Frontiers in Heat and Mass Transfer, Vol.16, pp. 1-9, 2021, DOI:10.5098/hmt.16.11

    Abstract Based on the Viscous Kelvin-Helmholtz theory used by D. Barnea & Y. Taitel (1993), a two-fluid stratified flow model of gas-liquid two-phase flow is established. Using the mathematical derivation, the influence of various influence factors on the stability of liquid level structure is synthesized. Compared with the criteria of D Barnea & Y. Taitel (1993) and Taitel & Dukler(1976) , and the algorithm of flow pattern transition criterion of stratified flow is proposed. According to the data of multiphase flow experimental loop, the influence of liquid viscosity and the instantaneous volume flow rate change of More >

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