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RISNumerical Modeling of Local Scour below a Piggyback Pipeline in Currents
Publisher: American Society of Civil Engineers
Abstract: Local scour below a piggyback pipeline in steady currents is investigated numerically. A piggyback pipeline comprises two pipelines that are arranged in the so-called piggyback configuration with the small pipeline being ...
Singular Value Decomposition–Based Collocation Spectral Method for Quasi-Two-Dimensional Laminar Water Hammer Problems
Publisher: American Society of Civil Engineers
Abstract: The radial distributions of velocity components need to be resolved in quasi-two-dimensional laminar water hammer problems. In a collocation spectra method, the radial distributions are approximated with Chebyshev expansions ...
Efficient Quasi-Two-Dimensional Model for Water Hammer Problems
Publisher: American Society of Civil Engineers
Abstract: Quasi-two-dimensional models for turbulent flows in water hammer are necessary for advancing the understanding of flow behavior in pipe transient; conducting detailed investigation of the fate of transient-induced ...
Godunov-Type Solutions for Water Hammer Flows
Publisher: American Society of Civil Engineers
Abstract: First- and second-order explicit finite volume (FV) Godunov-type schemes for water hammer problems are formulated, applied, and analyzed. The FV formulation ensures that both schemes conserve mass and momentum and produce ...
Steady Streaming around a Circular Cylinder near a Plane Boundary due to Oscillatory Flow
Publisher: American Society of Civil Engineers
Abstract: Steady streaming due to an oscillatory flow around a circular cylinder close to and sitting on a plane boundary is investigated numerically. Two-dimensional (2D) Reynolds-averaged Navier-Stokes equations are solved using ...
Numerical Simulation of Two-Degree-of-Freedom Vortex-Induced Vibration of a Circular Cylinder Between Two Lateral Plane Walls in Steady Currents
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Vortex-induced vibration (VIV) of a circular cylinder at a low mass ratio of 1.5 between two lateral walls is investigated numerically. The focus of the study is to examine the effects of ...
Numerical Modeling of Flow and Hydrodynamic Forces around a Piggyback Pipeline near the Seabed
Publisher: American Society of Civil Engineers
Abstract: Steady boundary layer flows around a two-cylinder configuration near a plane wall is investigated numerically. The Reynolds-averaged Navier-Stokes equations are solved using an upwind finite-element method with a
Applicability of Quasisteady and Axisymmetric Turbulence Models in Water Hammer
Publisher: American Society of Civil Engineers
Abstract: Two of the existing turbulence water hammer models, namely the two-layer and the five-layer eddy viscosity models, are implemented and analyzed and the accuracy of their quasi-steady and axisymmetric assumptions evaluated. ...
Hydrodynamic Difference of Rectangular-Box Systems with and without Narrow Gaps
Publisher: American Society of Civil Engineers
Abstract: To analyze the hydrodynamic difference between marine structures with and without narrow gaps, a two-dimensional fully nonlinear time-domain numerical wave flume is developed to investigate the hydrodynamics around multiple ...
Numerical and Experimental Investigation of Nonlinear Wave-Current Propagation over a Submerged Breakwater
Publisher: American Society of Civil Engineers