Rapid Monitoring of River Hydrodynamics and Morphology using Acoustic Holography
Lead Research Organisation:
UNIVERSITY COLLEGE LONDON
Department Name: Civil Environmental and Geomatic Eng
Abstract
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Organisations
Publications
Jalalabadi R
(2021)
Free surface flow over square bars at different Reynolds numbers
in Journal of Hydro-environment Research
Jalalabadi R
(2022)
Reynolds and dispersive shear stress in free-surface turbulent channel flow over square bars.
in Physical review. E
Jalalabadi R
(2023)
Large-eddy simulation of free-surface turbulent channel flow over square bars
in International Journal of Heat and Fluid Flow
Luo Q
(2023)
Water surface response to turbulent flow over a backward-facing step
in Journal of Fluid Mechanics
Luo Q
(2023)
Meandering of instantaneous large-scale structures in open-channel flow over longitudinal ridges
in Environmental Fluid Mechanics
Luo Q
(2023)
Hydrodynamics and turbulence of free-surface flow over a backward-facing step
in Journal of Hydraulic Research
Xie Z
(2020)
Two-phase flow simulation of breaking solitary waves over surface-piercing and submerged conical structures
in Ocean Engineering
Xie Z
(2022)
Eulerian and Lagrangian transport by shallow-water breaking waves
in Physics of Fluids
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)
A conservative and consistent implicit Cartesian cut-cell method for moving geometries with reduced spurious pressure oscillations
in Journal of Computational Physics
| Description | Numerical simulations of turbulent flow over topographic roughness showed significant correlation between the turbulence structure and the water surface deformation. As a result of flow separation near the channel bed water surface waves occur and the wave frequency matches the frequency of the vortex shedding process of flow separation. As a secondary process, the small-scale turbulence of the flow deforms the water surface in more random patters. |
| Exploitation Route | These results can be taken forward to design river monitoring equipment that would record and quantify surface waves, which can provide detailed information of the type of roughness that is found near the bed and can eventually lead to better flow monitoring. |
| Sectors | Environment |
| 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... |