Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of a Precoated Permeable Layer to a Pipeline Partially Buried in a Porous Seabed
AbstractThe flow characteristics around a pipeline partially buried in a rigid porous seabed of infinite depth are numerically examined using the classical boundary-element method. A simplified model, comprising an impermeable circular pipe with/without a permeable protective coating, is applied to analyze the oscillating-flow case. Darcy’s law and the potential-flow theory form the basis of this study. Taking advantage of the regular perturbation method prohibits the occurrence of the highly ill-conditioned linear systems because of substantial a difference in the order of magnitude among the flux and pressure continuity conditions across the soil- and coating-water interfaces. The computed results of uncoated cases reveal that the pore-fluid velocity rapidly increases in seabed areas close to the pipe. A remedy for this is to utilize a precoated permeable layer, which effectively eliminates the localized regions of the flow-induced pressure concentration. Numerical experiments show helpful results so far, which might lead to the development of cheap novel approaches to prevention of the piping effect.
Application of a Precoated Permeable Layer to a Pipeline Partially Buried in a Porous Seabed
AbstractThe flow characteristics around a pipeline partially buried in a rigid porous seabed of infinite depth are numerically examined using the classical boundary-element method. A simplified model, comprising an impermeable circular pipe with/without a permeable protective coating, is applied to analyze the oscillating-flow case. Darcy’s law and the potential-flow theory form the basis of this study. Taking advantage of the regular perturbation method prohibits the occurrence of the highly ill-conditioned linear systems because of substantial a difference in the order of magnitude among the flux and pressure continuity conditions across the soil- and coating-water interfaces. The computed results of uncoated cases reveal that the pore-fluid velocity rapidly increases in seabed areas close to the pipe. A remedy for this is to utilize a precoated permeable layer, which effectively eliminates the localized regions of the flow-induced pressure concentration. Numerical experiments show helpful results so far, which might lead to the development of cheap novel approaches to prevention of the piping effect.
Application of a Precoated Permeable Layer to a Pipeline Partially Buried in a Porous Seabed
Chang, Hsin-Yu (Autor:in) / Huang, Liang-Hsiung / Lin, Meng-Yu / Chang, Kao-Hao
2017
Aufsatz (Zeitschrift)
Englisch
Application of a Precoated Permeable Layer to a Pipeline Partially Buried in a Porous Seabed
| Online Contents | 2017
Wave-Induced Pressure on Buried Pipeline in Permeable Seabed
| British Library Conference Proceedings | 1996
Seabed Pore Pressures Around a Buried Pipeline
| British Library Conference Proceedings | 1993
Finite Element Analysis of an Offshore Pipeline Buried in a Porous Seabed: Effects of Cover Layer
| British Library Conference Proceedings | 2001