Imperial College Fluid Mechanics - CivEng

Fluid Mechanics Research Group in the Civil and Environmental Engineering Department at Imperial College London.

Operating as usual

29/10/2020

This virtual symposium might be of interest!

Dear INOREans (former, present, and to be),

following the trend of virtual events, we are excited to announce that INORE will go virtual as well! On November 19, 2020 we will hold our first INORE VIRTUAL SYMPOSIUM!

You can find all important information on the flyer below and register here: https://form.jotform.com/202734935757364

We are very excited about seeing you all in the virtual world very soon!

Stay tuned & stay safe

Observing the Mpemba effect with minimal bias and the value of the Mpemba effect to scientific outreach and engagement | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 02/09/2020

Is it quicker to cool or freeze water when the initial temperature is high [Mpempa effect]?
Read the latest paper by Henry Burridge for some insights!

Observing the Mpemba effect with minimal bias and the value of the Mpemba effect to scientific outreach and engagement | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences The Mpemba effect is the assertion that it is quicker to cool or freeze water when the initial temperature is high. We define the Mpemba effect to have been observed when two samples of water, one ...

08/06/2020

Research in waves is fun! Here is our boat surviving North Sea storm conditions! Captain Karmpadakis navigates a focused wave and random seas!

27/05/2020

simulation of a breaking wave.

27/03/2020

Kickoff meeting for the NERC project: "Quantifying Oceanic Whitecap Energy Dissipation and Bubble-Mediated Air-Sea Fluxes", led by Adrian Callaghan!🌊🌊

The 3-year project aims to develop new statistical descriptions of whitecap energy dissipation, bubble plume
pe*******on depths and air entrainment rates so that spectral wave models can be used to deliver sea-state dependent estimates of bubble-mediated air-sea fluxes. Laboratory experiments at Imperial College London (ICL), field-based observations from the ocean-observing Acqua Alta Tower (AAT) in the Adriatic sea and spectral wave modelling at the European Centre for Medium Range Forecasting (ECMWF) will be combined.

24/12/2019

Today, our holiday wishes made out of virtual microplastic particles were washed away by a strong rip current! 🎄
Nevertheless, Imperial College Fluid Mechanics scientists Cleo Jongedijk and wish you a great holiday and a wonderful 2020 full of 🎇

Photos from Imperial College Fluid Mechanics - CivEng's post 11/12/2019

Dr. Yannis Karmpadakis is presenting about the importance of Blue Carbon ecosystems as coastal protection measures at the meeting at Madrid. Co-benefits of these ecosystems include wave attenuation and sediment siltation which offer protection against coastal flooding and reduce coastal erosion.

10/12/2019

Noise as a traffic proxy for micro-environment specific personal exposure of traffic related PM.

Our next seminar will be presented by Luc Dekoninck from Ghent University.

Location: Skempton, Room 601.
Time and date: 12/12/2019, 1pm.

Abstract: Personal exposure is sensitive to the personal features and behavior of the individual, and including interpersonal variability will improve the health and quality of life evaluations.Participatory sensing assesses the spatial and temporal variability of environmental indicators and is used to quantify this interpersonal variability. Transferring the participatory sensing information to a specific study population is a basic requirement for epidemiological studies in the near future. We propose a methodology to reduce the void between participatory sensing and health research. Instantaneous microscopic land-use regression modeling (µLUR) is an innovative approach. Data science techniques extract the activity-specific and route-sensitive spatiotemporal variability from the data. A data workflow to prepare and apply µLUR models to any mobile population is presented. The µLUR technique and data workflow are illustrated with models for exposure to traffic related Black Carbon. The example µLURs are available for three micro-environments; bicycle, in-vehicle, and indoor. Instantaneous noise assessments supply instantaneous traffic information to the µLURs. The activity specific models are combined into an instantaneous personal exposure model for Black Carbon. An independent external validation reached a correlation of 0.65. The µLURs can be applied to simulated behavioral patterns of individuals in epidemiological cohorts for advanced health and policy research.

04/12/2019

Lois Baker is joining us from the Maths Department as she moves into the PhD phase of the ‘Mathematics of Planet Earth’ CDT. Her PhD research is on 'transition to turbulence over submarine topography' under the supervision of Dr Ali Mashayek. Lois completed her undergraduate and Master’s degrees at the University of Cambridge, where she completed her thesis on 'submesoscale instabilities of an ocean jet', and has recently attended the Woods Hole GFD summer school where she completed a research project on 'superharmonics of internal tides'. Lois is now looking forward to getting stuck into her PhD work and presenting at a conference next year, as well as trying her best to go to sea to study the ocean close-up.

27/11/2019

Jingzi Huang is continuing on at Imperial College to begin a PhD in turbulent fountains under the supervision of Dr Maarten van Reeuwijk. Jingzi completed his MSc in our section, where he looked into Rayleigh-Benard convection during his research project. Jingzi is now looking forward to start a new and exciting journey as a PhD.

20 Annual Film Evening, London 26/11/2019

The 20th Offshore Engineering Society's Annual Film Evening.

This event will feature films covering a wide variety of diverse topics and a talk by Dr Ray Hobbs. It will be held on the 3rd of December from 6pm at at the Institution of Civil Engineers, 1 Great George St., London SW1P 3AA.

You can register here: https://www.ice.org.uk/events/20th-annual-film-evening-london

More information on the OES can be found by following these links:
https://www.linkedin.com/comp…/offshore-engineering-society/
https://www.facebook.com/Offshore-Engineering-Society-1668747536543904/
https://twitter.com/The_OE_Society

20 Annual Film Evening, London Join us for the 20th OES Annual Film Evening

Studentship opportunities 22/11/2019

PhD Studentship - The role of hydrodynamics in mediating effects of climate change on ecosystem stability and functioning.


Using a novel combination of simulation and analytical approaches, model dynamic Nutrient-Phytoplankton-Bacterial ecosystems/communities under different hydrodynamic and temperature regimes, potentially coupled with lab experiments to parameterize or validate the theory.


Studentship opportunity in the Life Sciences Department with Dr Samraat Pawar, Professor Matthew Piggott Professor and Graham Hughes.


Details: https://www.imperial.ac.uk/grantham/education/science-and-solutions-for-a-changing-planet-dtp/studentship-opportunities/

Studentship opportunities SSCP DTP

Workshop, December 17-19 2019 21/11/2019

Data and model integration in fluid mechanics Winterschool, Imperial College, 17-19 December 2019.


This workshop, which is jointly hosted by the COMPLETE European Training network and the Imperial College Fluids CDT, will explore the interface between data and mathematical models. Topics range from advanced measurement techniques and structure identification, large-eddy simulation of atmospheric boundary layers, to data assimilation and weather forecasting.


More information can be found here:
https://sites.google.com/view/workshop-imperial/home

Registration form: https://docs.google.com/forms/d/e/1FAIpQLSeqhr0Tl85nnKLH_bHLUbF4HA4xKnOYbLrqqBUahVg6GB0_ag/viewform

Workshop, December 17-19 2019 This workshop, which is jointly hosted by the COMPLETE European Training network and the Imperial College Fluids CDT, will explore the interface between data and mathematical models. Topics range from advanced measurement techniques and structure identification, large-eddy simulation of atmospheric....

20/11/2019

Sam Owens is doing a PhD on 'real-time simulation of urban air quality and microclimate' under the supervision of Dr Maarten van Reeuwijk. He aims to advance the capabilities of the urban LES code DALES-Urban, primarily by capitalising on the computational advances brought about by graphics processing units.


Sam has an MSc in 'Advanced Computational Methods for Aeronautics, Flow Management and Fluid-Structure Interaction' from Imperial College and contributed to the development of the spectral/hp element framework Nektar++ as part of his individual project. He also has a BSc in Mathematical Physics from the University of Edinburgh.


Sam is particularly looking forward to investigating how ray tracing can be used to calculate the exchange of radiation within the urban environment.

18/11/2019

Stochastic wave-current interaction in stratified shallow water dynamics.


Our next seminar will be presented by Erwin Luesink a PhD student from the Mathematics department supervised by Prof. Darryl Holm.


Location: Skempton, Room 165.
Time and date: 20/11/2019, 1pm.


Abstract: Holm (Proc. Roy. Soc 2015) introduced a variational framework for stochastically parametrising unresolved scales of hydrodynamic motion. This variational framework preserves fundamental features of fluid dynamics, such as Kelvin's circulation theorem, while also allowing for dispersive nonlinear wave propagation within a stratified fluid, as well as at its free surface. In this talk, we will discuss the option of combining asymptotic expansions and vertical averaging with the stochastic variational framework to formulate a new approach for developing stochastic parametrisation schemes. It applies this approach to the various stratified shallow water equations which descend from Euler's three-dimensional fluid equations under approximation by asymptotic expansions and vertical averaging. In the nonlinear stochastic wave-current interaction theory derived here this way, Kelvin's circulation theorem reveals a barotropic mechanism for wave generation of horizontal circulation (cyclogenesis) which is activated whenever the gradients of wave elevation and/or topography are not aligned with the gradient of the vertically averaged buoyancy.

Studentship opportunities 15/11/2019

PhD Studentship - Gulf stream's role in regulating the climate system.


Study the dynamics within the Gulf stream and North Atlantic region to improve the understanding of the changes in the Gulf stream due to climate change as well as the feedbacks of such changes on the global climate trends. Oceanographic observations, geophysical fluid dynamics, and state of art ocean and climate models will be the primary tools employed in this project.


Studentship opportunity in the Mathematics Department with Professor Pavel Berloff and Dr Ali Mashayek.


Details: https://www.imperial.ac.uk/grantham/education/science-and-solutions-for-a-changing-planet-dtp/studentship-opportunities/

Studentship opportunities SSCP DTP

A comparison of entrainment in turbulent line plumes adjacent to and distant from a vertical wall | Journal of Fluid Mechanics | Cambridge Core 13/11/2019

In this new paper, David Parker and Henry Burridge compare the entrainment in turbulent line plumes adjacent to and distant from a vertical wall.


David's work has already informed Breathing Building's online cold-draught calculator: https://www.breathingbuildings.com/services/free-design-tools/



More details can be found here:
https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/comparison-of-entrainment-in-turbulent-line-plumes-adjacent-to-and-distant-from-a-vertical-wall/E6AB1C72E8E9C42A76DD9F317B1F6E3C

A comparison of entrainment in turbulent line plumes adjacent to and distant from a vertical wall | Journal of Fluid Mechanics | Cambridge Core A comparison of entrainment in turbulent line plumes adjacent to and distant from a vertical wall - Volume 882 - D. A. Parker, H. C. Burridge, J. L. Partridge, P. F. Linden

12/11/2019

Last week, Tom Higton showed his experiment to our latest MSc cohort. Salt-bath experiments are used to simulate buoyancy-driven air flows in buildings. A perspex box is placed inside the tank with a localised source of saline to simulate real-life density differences such as temperature. By altering the size and configuration of the openings to the ambient environment, we saw how the density structure within the box will adjust to suit the new configuration.

11/11/2019

Natural ventilation through a sash window.

Our next seminar will be presented by Gaël Kemp who has been working as an intern in DAMTP for the MAGIC (Managing Air for Green Inner Cities) project since June 2019. His work with Prof. Paul F. Linden and Dr. Megan S. Davies Wykes, focuses on studying analytically and experimentally natural ventilation through sash window.


Sash windows, which allow vertical openings at the top and/or
bottom are a common feature in domestic buildings. This study presents a numerical and a analytical model to predict the flow through a sash window. The predictions of these models are compared with water-tank experiments. The conditions for uni-directional and bi-directional flow through the open panels are discussed and the most efficient opening strategies are defined.


Location: Skempton, Room TBC.
Time and date: 13/11/2019, 1pm.

Studentship opportunities 08/11/2019

PhD Studentship - Design optimisation and data assimilation for desalination outfalls.


Study the the optimal configuration of the inlet and discharge pipes as well as the operation of a desalination plant such that in a tidal environment previously discharged water is not taken in again by the plant, and that the discharged water has minimal impacts of the environment.



Studentship opportunity in the Civil and Environmental Engineering Department with Dr John Craske, Professor Matthew Piggott and Dr Maarten van Reeuwijk.



Details: https://www.imperial.ac.uk/grantham/education/science-and-solutions-for-a-changing-planet-dtp/studentship-opportunities/

Studentship opportunities SSCP DTP

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