Distributed Fibre-optic Cable Sensing for Buried Pipe Infrastructure
Lead Research Organisation:
UNIVERSITY COLLEGE LONDON
Department Name: Civil Environmental and Geomatic Eng
Abstract
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Organisations
Publications
Liu Y
(2022)
Impact of turbulence and secondary flow on the water surface in partially filled pipes
in Physics of Fluids
Liu Y
(2022)
Effect of secondary currents on the flow and turbulence in partially filled pipes
in Journal of Fluid Mechanics
Xie Z
(2021)
Numerical Investigation of Steep Focused Wave Interaction with a Vertical Cylinder Using a Cartesian Cut-cell Method
in International Journal of Offshore and Polar Engineering
Xie Z
(2022)
Eulerian and Lagrangian transport by shallow-water breaking waves
in Physics of Fluids
Xie Z
(2020)
A control volume finite element method for three-dimensional three-phase flows
in International Journal for Numerical Methods in Fluids
Xie Z
(2020)
Two-phase flow simulation of breaking solitary waves over surface-piercing and submerged conical structures
in Ocean Engineering
Xie Z
(2021)
Simulation of Three-Dimensional Free-Surface Dam-Break Flows over a Cuboid, Cylinder, and Sphere
in Journal of Hydraulic Engineering
Xie Z
(2020)
A three-dimensional Cartesian cut-cell/volume-of-fluid method for two-phase flows with moving bodies
in Journal of Computational Physics
Xie Z
(2022)
A conservative and consistent implicit Cartesian cut-cell method for moving geometries with reduced spurious pressure oscillations
in Journal of Computational Physics
Xie Z
(2020)
A Cartesian cut-cell based multiphase flow model for large-eddy simulation of three-dimensional wave-structure interaction
in Computers & Fluids
| Description | Numerical simulations of flows in partially-filled pipes have shown that such flows contain strong secondary currents and that these disrupt and suppress very large scale turbulent motion in pipes. The result is that the turbulent shear stress is reduced and hence the overall wall friction resulting in a lower friction factor of partially-filled pipe flows in comparison to their fully-filled counterpart. |
| Exploitation Route | This finding may lead to a redesign of pipes, so that strong secondary currents are generated, which in turn would lead to less friction in the pipe, or in other words less energy to pump the same amount of fluid through the pipe. |
| Sectors | Construction Energy |
| Title | Research Code Enhancements |
| Description | The open-source code Hydro3D, based on the method of large-eddy simulation, was enahnced by a free-surface algorithm which was validated and applied to open-channel flow over a backward facing step. A Journal of Fluid Mechanics and a Journal of Hydraulic research paper document this development. |
| Type Of Material | Improvements to research infrastructure |
| Year Produced | 2021 |
| Provided To Others? | No |
| Impact | Several journal publications have resulted from this development. |
| Title | Level Set Method |
| Description | As describd in the Research Environment section, the open source code Hydro3D was enhanced with a Level Set Method algorithm. This method is now standard for all our open-channel flow simulations. |
| Type Of Technology | New/Improved Technique/Technology |
| Year Produced | 2021 |
| Impact | The new method resulted in a couple of fundamental research papers and will be used in future research. |
| Title | Simulation of tidal stream turbines using Hydro3D |
| Description | Hydro3D is an open-source Large-Eddy Simulation based code used for hydraulic engineering applications and has been recently developed to simulate tidal stream turbines. Hydro3D is written in FORTRAN 95 and is parallelised with MPI, both required to be installed prior code compilation. For a more detailed description of Hydro3D, its current development and related publications please visit: http://hydro3dproject.github.io/ Note that the current dataset gathers the input files set to simulate a single horizontal axis tidal stream turbine operating at its maximum performance and with artificial turbulence at the inflow condition. The input files (.cin) used in Hydro3D are: - control.cin - in this file all the flow conditions, numerical schemes and output paramenters are set. - geom.cin - is used to define the properties of any solid body (e.g. tidal turbine) used during the simulation. - mdmap.cin and infodom.cin - these files indicate the division pattern of the computational domain in rectangular blocks together with their assignation to CPUs. |
| Type Of Technology | Software |
| Year Produced | 2017 |
| Impact | The code was enhanced by adding free surface algorithms. |
| URL | https://research-data.cardiff.ac.uk/articles/software/Simulation_of_tidal_stream_turbines_using_Hydr... |