Surface-specific Moody diagram: A new paradigm to predict drag penalty of realistic rough surfaces with applications to maritime transport
Lead Research Organisation:
University of Glasgow
Department Name: School of Engineering
Abstract
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Organisations
Publications
Alves Portela F
(2021)
Numerical study of Fourier-filtered rough surfaces
in Physical Review Fluids
Busse A
(2022)
Direct numerical simulations of turbulent channel flow over ratchet roughness
in Flow, Turbulence and Combustion
Busse A
(2019)
Influence of Surface Anisotropy on Turbulent Flow Over Irregular Roughness
in Flow, Turbulence and Combustion
Jelly T
(2019)
Reynolds number dependence of Reynolds and dispersive stresses in turbulent channel flow past irregular near-Gaussian roughness
in International Journal of Heat and Fluid Flow
Jelly T
(2022)
Impact of spanwise effective slope upon rough-wall turbulent channel flow
in Journal of Fluid Mechanics
Sarakinos S
(2022)
Investigation of rough-wall turbulence over barnacle roughness with increasing solidity using direct numerical simulations
in Physical Review Fluids
Sarakinos S
(2019)
Recent Advances in CFD for Wind and Tidal Offshore Turbines
Sarakinos S
(2019)
Recent Advances in CFD for Wind and Tidal Offshore Turbines
Sarakinos S.
(2019)
Influence of spatial distribution of roughness elements on turbulent flow past a biofouled surface
in 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
| Description | This project started in 2017 and investigates the fluid-dynamic properties of marine types of roughness. An algorithm that mimics the settlement behaviour of barnacles has been developed. The algorithm has been used to create surface roughness caused by this form of marine biofouling. A book chapter on this algorithm has been published in early 2019. A large database of DNS data for different forms of marine roughness (such as barnacles, tubeworms and fresh cleaned hulls) has been generated. Further cases synthesized from the scan of a grit-blasted surface have been added. This database is used for validation of the DNS/RANS hybrid simulation methods that are being developed at the University of Southampton and for the development for improved empirical correlations for fluid dynamic roughness effects. |
| Exploitation Route | The DNS (direct numerical simulation) database on marine roughness will help researchers to develop improved empirical models and relationships for predicting the fluid dynamic roughness effects (e.g. drag penalty) of forms of roughness typically found in the marine environment. The barnacle surface generation algorithm might in future be applied by researchers in industry and academia wishing to investigate the effect of barnacle fouling on ship hulls or off-shore structures such as tidal turbines. The obtained insight into the dependency of roughness effects caused by barnacles on the surface coverage can be used to inform the scheduling of hull maintenance cycles. |
| Sectors | Aerospace, Defence and Marine,Energy,Transport |
| Description | This project started in 2017. At this stage of the project, the following non-academic impacts have been achieved: Public outreach activities of this project (panel member at Imagineer events as part of Glasgow Science Festival, stand at European Researchers Night 2017, research station at Explorathon Extravaganza! 2018, Explorathon 2019 Riverside Museum) where members of the project team interacted with school children and the general public, contributing to increased public engagement with the research undertaken on this project including the wider context of the research. In addition, the people employed on this grant have acquired valuable new skills (e.g., in advanced high performance computing, new programming languages, development of effective public outreach activities) which contributes towards the enhancement of the research capacity of public sector organisations. Several databases with research data have been made available to the public. |
| First Year Of Impact | 2018 |
| Sector | Aerospace, Defence and Marine,Education,Other |
| Impact Types | Cultural,Societal |
| Description | Secondary Currents In Turbulent Flows Over Rough Walls |
| Amount | £394,297 (GBP) |
| Funding ID | EP/V002066/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 01/2021 |
| End | 09/2024 |
| Title | Direct numerical simulations of turbulent channel flow over ratchet roughness |
| Description | This data set contains mean flow, Reynolds stress, and dispersive stress statistics for the cases discussed in the paper. For file naming conventions and contents please refer to enclosed documentation. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | This dataset is intended for validation and development of improved RANS rough-wall models. |
| URL | http://researchdata.gla.ac.uk/id/eprint/1318 |
| Title | Impact of spanwise effective slope upon rough-wall turbulent channel flow [Data Collection] |
| Description | Surface and velocity data discussed in the paper [1] Thomas O. Jelly, Aditya Ramani, Bagus Nugroho, Nicholas Hutchins and Angela Busse, Impact of spanwise effective slope on rough-wall turbulent channel flow, Journal of Fluid Mechanics (accepted September 2022) is made available to the public. The reader is referred to [1] for a fully detailed description of the dataset and the methods used for its generation. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | This dataset is intended for validation and development of improved RANS rough-wall models. |
| URL | https://leicester.figshare.com/articles/dataset/Impact_of_spanwise_effective_slope_upon_rough-wall_t... |
| Title | Influence of surface anisotropy on turbulent flow over irregular roughness. [Data Collection] |
| Description | Surface and velocity data discussed in the paper [1] Angela Busse and Thomas O. Jelly, In?uence of surface anisotropy on turbulent ?ow over irregular roughness, Flow, Turbulence and Combustion (2020) is made available to the public. The reader is referred to [1] for a fully detailed description of the dataset and the methods used for its generation. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Impact | This is a collection of irregular anisotropic surfaces and associated data on their fluid dynamic behaviour. This database contributes data for the development and validation of empirical models for flow over rough walls. |
| URL | http://researchdata.gla.ac.uk/877/ |
| Title | Investigation of rough-wall turbulence over barnacle roughness with increasing solidity using direct numerical simulations |
| Description | Surface data and velocity statistics for cases discussed in the paper. For details please see documentation included with the dataset. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2022 |
| Provided To Others? | Yes |
| Impact | This dataset is intended for validation and development of improved RANS rough-wall models. |
| URL | http://researchdata.gla.ac.uk/id/eprint/1288 |
| Title | Reynolds number dependence of Reynolds and dispersive stresses in turbulent channel flow past irregular near-Gaussian roughness |
| Description | Data to accompany associated publication. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2019 |
| Provided To Others? | Yes |
| Description | Explorathon (European Researchers Night) |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | We participated with a stand at the Explorathon '17 at the Riverside Museum in Glasgow on the 29th of September. This event that formed part of the European Researchers Night in Scotland. As part of this stand we an interactive display where visitors could test different forms of roughness. A total of 172 visitors participated in the interactive part of the display of which 116 correctly identified the surface with the highest fluid dynamic roughness effect. |
| Year(s) Of Engagement Activity | 2017 |
| URL | http://www.explorathon.co.uk/ |
| Description | Explorathon Extravaganza 2018 |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | The project team participated in the Explorathon Extravaganza! event that took place at the Riverside Museum in Glasgow in September 2018. A research station was presented where visitors could conduct a small experiment on flow over rough surfaces. The research station also included further rough surface specimens, mainly from a marine type roughness background, and information panels. Visitors of all ages participated in the research station. The age group with the biggest number of participants were primary-school aged children. Visitors asked questions about roughness and how biofouling builds up on ship hulls. There were also some visitors who shared their on experience with marine biofouling in the context of maintenance of sailing boats. |
| Year(s) Of Engagement Activity | 2018 |
| URL | http://www.explorathon.co.uk/glasgow/ |
| Description | Imagineer events |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Schools |
| Results and Impact | Two researchers participated in 'Imagineer' events run under the umbrella of the Glasgow Science Festival. This involved participation in a consultation event during spring 2017, where engineers explained their concepts and visions to performance artists, who were developing an engineering inspired theatre show. Later in the year one member of the research term participated as a panel member in multiple Q&A sessions with school pupils after the educational shows. |
| Year(s) Of Engagement Activity | 2017 |
| Description | Presentation to the APS Journal Club |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Policymakers/politicians |
| Results and Impact | A presentation was given to the Physical Journal Club on a journal publication emerging from this grant. The Physical Review Journal Club is an online seminar series organised by the American Physical Society and its events are open to the general public. The presentations are recorded and made available online after the event. |
| Year(s) Of Engagement Activity | 2022 |
| URL | https://journals.aps.org/journal-club |
| Description | Research Station: Explorathon 2019 Riverside Museum Glasgow |
| Form Of Engagement Activity | Participation in an activity, workshop or similar |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | An interactive research station on flow over rough surfaces (focussing on marine examples of roughness) was presented as part of the Explorathon 2019 in the Riverside Museum Glasgow. Several hundred members of the public visited the research station. |
| Year(s) Of Engagement Activity | 2019 |