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Numerical Simulation of Two-Phase Boiling Heat Transfer in a 65 mm Horizontal Tube for Enhanced Heavy Oil Recovery

Author

Listed:
  • Genying Gao

    (Oil Production Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay 834000, China)

  • Zicheng Wang

    (Oil Production Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay 834000, China)

  • Gaoqiao Li

    (Oil Production Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay 834000, China)

  • Chizhong Wang

    (State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Lei Deng

    (State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

To enhance the steam parameters of steam injection boilers during the thermal recovery of heavy oil while ensuring the safe and stable operation of boiler pipelines, this study conducted two-phase flow boiling numerical simulations in a horizontal heated tube with an inner diameter of 65 mm, using water and water vapor as working fluids. The analysis focused on the gas–liquid phase distribution, temperature profiles, near-wall fluid velocity, and pressure drop along both the axial and radial directions of the tube. Furthermore, the effects of heat flux density, mass flow rate, and inlet subcooling on these parameters were systematically investigated. The results reveal that higher heat fluxes intensify the velocity difference between the upper and lower tube walls and enlarge the temperature gradient across the wall surface. A reduction in mass flow rate increases the gas phase fraction within the tube and causes the occurrence of identical flow patterns at earlier axial positions. Additionally, the onset of nucleate boiling shifts upstream, accompanied by an increase and upstream movement of the wall’s maximum temperature. An increase in inlet subcooling prolongs the time required for the working fluid mixture to reach saturation, thereby decreasing the gas phase fraction and delaying the appearance of the same flow patterns. Finally, preventive and control strategies for ensuring the safe operation of steam injection boiler pipelines during heavy oil recovery are proposed from the perspective of flow pattern regulation.

Suggested Citation

  • Genying Gao & Zicheng Wang & Gaoqiao Li & Chizhong Wang & Lei Deng, 2025. "Numerical Simulation of Two-Phase Boiling Heat Transfer in a 65 mm Horizontal Tube for Enhanced Heavy Oil Recovery," Energies, MDPI, vol. 18(12), pages 1-28, June.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:12:p:3100-:d:1677565
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    References listed on IDEAS

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    1. Ge, Mingming & Manikkam, Pratulya & Ghossein, Joe & Kumar Subramanian, Roshan & Coutier-Delgosha, Olivier & Zhang, Guangjian, 2022. "Dynamic mode decomposition to classify cavitating flow regimes induced by thermodynamic effects," Energy, Elsevier, vol. 254(PC).
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