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Dynamic response of dilute to viscous channelized debris flow on pipeline crossing

Author

Listed:
  • Mudassir Ali Khan

    (Universiti Technologi PETRONAS)

  • Zahiraniza Mustaffa

    (Universiti Technologi PETRONAS)

  • Indra Sati Hamonangan Harahap

    (Universitas Islam Indonesia)

Abstract

This study experimentally investigates the dynamic response of dilute to viscous channelized debris flows on pipeline crossing. The debris flow impact mechanism, front flow depths, and front velocities were measured and analyzed using pressure transducers, ultrasonic sensor, and high-speed cameras in a 9-degree inclined flume at different solid volume fractions (αs). The debris flow samples were characterized as dilute to viscous mixtures based on calculated Froude and Reynolds numbers. The experimental findings revealed that dilute debris flows impacted the pipe model in turbulent manner with splashing phenomena. In contrast, viscous debris flows exhibited relatively less flow velocities, leading to the layered impact phenomena. Significant variations in flow depths, frontal velocity, and impact pressures were observed due to composition and flow mechanism of debris flow mixtures. Front flow depths were substantially increased, while front velocities and impact pressures were decreased with an increment of solid volume fractions. The calculated dimensionless number confirmed the similarity of experimental results with those observed in natural phenomena and other experimental studies. Further, for dilute debris flows, dimensionless impact pressure was a power function of Froude number (Fr), while for viscous debris flows, it was a power function of both Froude number (Fr) and Reynolds number (Re).

Suggested Citation

  • Mudassir Ali Khan & Zahiraniza Mustaffa & Indra Sati Hamonangan Harahap, 2024. "Dynamic response of dilute to viscous channelized debris flow on pipeline crossing," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 120(6), pages 5141-5161, April.
    • Handle: RePEc:spr:nathaz:v:120:y:2024:i:6:d:10.1007_s11069-024-06419-1
    DOI: 10.1007/s11069-024-06419-1
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    References listed on IDEAS

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    1. Zainul Haza & Indra Harahap & Lema Dakssa, 2013. "Experimental studies of the flow-front and drag forces exerted by subaqueous mudflow on inclined base," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 68(2), pages 587-611, September.
    2. Rossi, Lorenzo & Casson Moreno, Valeria & Landucci, Gabriele, 2022. "Vulnerability assessment of process pipelines affected by flood events," Reliability Engineering and System Safety, Elsevier, vol. 219(C).
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