Simulation Model of The Collision Event of Submarine Mudflows Exerting A Horizontal Pipeline

INDRA SATI, HAMONANGAN HARAHAP and ZAINUL, FAIZIEN HAZA (2015) Simulation Model of The Collision Event of Submarine Mudflows Exerting A Horizontal Pipeline. In: Third International Conference on Advances in Civil and Structural Engineering - CSE 2015, 11-12 APRIL 2015, Kuala Lumpur, Malaysia.

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Abstract

The collision between submarine slide and sub-sea pipelines was simulated through laboratory experiment in order to investigate drag force exerted by mudflow on pipe surface. Mud model used was slurry of kaolin clay-water mixtures. Gravity flow concepts of fluid mechanics principles were implemented by lock-exchange system. It was developed through the laboratory equipment of rectangular channel to generate the mudflow in water ambient. A crosswise pipe stem positioned at certain run-out distance. It was collided by mudflow. The collision attributes of velocity (u), Reynolds number (Re), maximum drag force exerted by mudflow (Fdmax) and drag force coefficient (Cd) were observed based on ratio between water depth (at pipe position) and pipe diameter, abbreviated as H/d. Overall, higher H/d ratio generated higher values of collision attributes. H/d ratio variations had similar constant of Power-law model expression in Re-Cd relationship. It proved that H/d ratio had not effect to Cd very much. The current experiment also generated a high similarity trend line of Re-Cd relationship graph with the previous study. It indicated that the content of clay material (i.e. kaolin) play a major role in mudflow movement and collision, whereas granular materials (used in previous study) provide an extra density.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: submarine slide, mudflow, kaolin clay, lockexchange, gravity flow, drag force coefficient.
Depositing User: Mr. John Steve
Date Deposited: 04 May 2019 12:29
Last Modified: 04 May 2019 12:29
URI: http://publications.theired.org/id/eprint/1935

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