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• W4286263508 endingPage "117606" @default.
• W4286263508 startingPage "117606" @default.
• W4286263508 abstract "Owing to the change in flow behavior, fibrous particles doped in fluid can be expected to gather and deposit at the locations of tiny leaks, automatically plugging the leaks and realizing the repair of pipeline. In this paper, a numerical simulation study of gas–solid flow in a gas pipeline with tiny leak hole is carried out by using computational fluid dynamics model and discrete element method, with an effort to reveal the influence of fibrous particles with different parameters on the leak plugging rate (LPR) defined as a relative change rate of mass leakages before and after plugging. In the simulation, the leak hole is set as 5 mm in diameter, the fibrous particles are 0.16 mm in diameter and 21.62 in aspect ratio, and the investigated particle parameters include surface energy, density, velocity, and number. In order to economize the time cost and achieve the best LPR, the investigated particle parameters as well as the simulation process are optimized by using the response surface methodology with a central composite design. The simulation results demonstrate that the significance order of these particle parameters to the LPR are sorted as the density, number, surface energy, and velocity, the combination of particle density and number is able to produce a higher LPR, and the optimal particle parameters are the surface energy of zero J/m 2 , density of 3000 kg/m 3 , velocity of 14 m/s, and number of 5000, which yield a LPR of about 30.74% in the absence of entanglement between fibrous particles. The above findings not only justify the adopted models and methods, but also provide some references for the relevant experimental researches. • The automatic pipeline repair based on the platelet technology was simulated. • The simulation process was optimized by using the response surface methodology. • The significance of particle parameters to the leak plugging rate was revealed. • The combination of particle density and number was proved to be important. • The optimal particle parameters for a leak plugging rate of 30.74% were found." @default.
• W4286263508 created "2022-07-21" @default.
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• W4286263508 date "2022-07-01" @default.
• W4286263508 modified "2023-10-16" @default.
• W4286263508 title "Numerical study on automatic repair inside the pipeline for the small leakage gas pipeline by using fibrous particles" @default.
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• W4286263508 doi "https://doi.org/10.1016/j.powtec.2022.117606" @default.
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