An integrated model for pore pressure accumulations in marine sediment under combined wave and current loading

2016 ◽  
Vol 10 (4) ◽  
pp. 387-403 ◽  
Author(s):  
Y. Zhang ◽  
D.-S. Jeng ◽  
H.-Y. Zha ◽  
J.-S. Zhang
Keyword(s):  
Pore Pressure ◽  
Marine Sediment ◽  
Integrated Model ◽  
Current Loading

Numerical Modeling of Seabed Response to Combined Wave and Current Loading

2012 ◽  
Author(s):  
Ji-Sheng Zhang ◽  
Yu Zhang ◽  
Dong-Sheng Jeng ◽  
C. Zhang
Keyword(s):  
Numerical Modeling ◽  
Internal Wave ◽  
Pore Pressure ◽  
Integrated Model ◽  
Navier Stokes ◽  
Soil Parameters ◽  
Numerical Examples ◽  
Closure Scheme ◽  
Wave Maker ◽  
Current Loading

An integrated model is developed to study the response of a porous seabed to combined wave-current loading. While the Reynolds-Averaged Navier-Stokes (RANS) equations with k-ε turbulence closure scheme and internal wave-maker function are solved for the wave-current interactions, Biot’s poro-elastic “u-p” model is adopted for the seabed response. After validated by the laboratory measurement, this model is applied to investigate the effects of wave, current and soil parameters on the wave-current induced seabed response. Numerical examples conclude that interacting with the following currents, waves with a shorter period or greater height lead to smaller values of maximum pore pressure.

Modeling of Wave-Induced Seabed Response and Liquefaction Potential Around Pile Foundation

2013 ◽  
Author(s):  
Titi Sui ◽  
Jisheng Zhang ◽  
Jinhai Zheng ◽  
Chi Zhang
Keyword(s):  
Pore Pressure ◽  
Pile Foundation ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Wave Mode ◽  
Integrated Model ◽  
Liquefaction Potential ◽  
Pile Interaction ◽  
Experimental Works ◽  
Wave Induced

A 3D integrated model is developed to study wave-induced seabed response and liquefaction potential around square pile foundation. While a Boussinesq wave mode (FUNWAVE) is used to simulate the wave-pile interaction, a seabed mode (WINBED) based on Biot’s poro-elastic theory is solved for the seabed deformation, effective stresses and pore water pressure in soil. After verified with previous model and experimental works, this integrated model is applied to investigate the wave-induced seabed response and liquefaction potential in the vicinity of square pile foundation. The numerical results indicate that wave-induced pore pressure reduces rapidly with an increasing seabed depth, and the maximum pore pressure and largest liquefaction potential can be identified in front of the square pile foundation. It is also found that the phenomenon of liquefaction may occur inside the seabed soil while the upper layer remains un-liquefied.

scholarly journals Two-Dimensional Numerical Study of Seabed Response around a Buried Pipeline under Wave and Current Loading

2019 ◽  
Vol 7 (3) ◽  
pp. 66 ◽  
Author(s):  
Cynthia Foo ◽  
Chencong Liao ◽  
Jinjian Chen
Keyword(s):  
Numerical Model ◽  
Pore Pressure ◽  
Numerical Study ◽  
Current Model ◽  
Navier Stokes ◽  
Buried Pipeline ◽  
Soil Permeability ◽  
Biot’S Equation ◽  
Current Loading ◽  
Wave Induced

The evaluation of the wave-induced seabed response around a buried pipeline has been widely studied. However, the analysis of seabed response around marine structures under the wave and current loadings are still limited. In this paper, an integrated numerical model is proposed to examine the wave and current-induced pore pressure generation, for instance, oscillatory and residual pore pressure, around a buried pipeline. The present wave–current model is based on the Reynolds-Averaged Navier–Stokes (RANS) equation with k - ε turbulence while Biot’s equation is adopted to govern the seabed model. Based on this numerical model, it is found that wave characteristics (i.e., wave period), current velocity and seabed characteristics such as soil permeability, relative density, and shear modulus have a significant effect on the generation of pore pressure around the buried pipeline.

Multilinguistic Components of Spelling: An Overview

2013 ◽  
Vol 20 (4) ◽  
pp. 124-128 ◽  
Author(s):  
Angela Barber
Keyword(s):  
Integrated Model ◽  
Literacy Skills ◽  
Speech Language Pathologists ◽  
Language System ◽  
Adequate Information ◽  
Intervention Plan ◽  
Semantic Awareness

Spelling is a window into a student's individual language system and, therefore, canprovide clues into the student's understanding, use, and integration of underlyinglinguistic skills. Speech-language pathologists (SLPs) should be involved in improvingstudents' literacy skills, including spelling, though frequently available measures ofspelling do not provide adequate information regarding critical underlying linguistic skillsthat contribute to spelling. This paper outlines a multilinguistic, integrated model of wordstudy (Masterson & Apel, 2007) that highlights the important influences of phonemicawareness, orthographic pattern awareness, semantic awareness, morphologicalawareness and mental graphemic representations on spelling. An SLP can analyze anindividual's misspellings to identify impairments in specific linguistic components andthen develop an individualized, appropriate intervention plan tailored to a child's uniquelinguistic profile, thus maximizing intervention success.

Political orientation and sexual prejudice: A test of Dovidio and Gaertner's integrated model

2007 ◽  
Author(s):  
Helen C. Harton ◽  
Kimberley Kochurka ◽  
Jennifer Bumgarner ◽  
Melinda Bullock
Keyword(s):  
Integrated Model ◽  
Sexual Prejudice ◽  
Political Orientation
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