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Today's Topics:
1. PhD position numerical simulation of volcanic processes
(van Reeuwijk, Maarten)
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Message: 1
Date: Tue, 13 Jan 2015 10:54:03 +0000
From: "van Reeuwijk, Maarten" <m.vanreeuwijk@imperial.ac.uk>
Subject: [Met-jobs] PhD position numerical simulation of volcanic
processes
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The NERC Doctoral Training Programme at Imperial College funds 15 PhD projects commencing in August next year.
We have an opening for a project involving numerical simulation (Direct Numerical and Large-Eddy Simulation) of idealised eruptions, with an aim to improve the operational dispersion model NAME which is used for the Met Office's operational forecasts for ash-cloud predictions.
We are looking for a home student (UK or having done an UG in the UK) who has an appetite for learning about buoyancy driven flows, has affinity with numerics and mathematical modelling and has or expected to hold a MSc/MEng degree in meteorology, physics, engineering or mathematics.
Full details can be found below.
Supervisors: Maarten van Reeuwijk (m.vanreeuwijk@imperial.ac.uk<mailto:m.vanreeuwijk@imperial.ac.uk>), Ben Devenish (Met Office), Gabriel Rooney (Met Office)
Department: Civil and Environmental Engineering
The eruption of Eyjafjallajokull in 2010 demonstrated the level of disruption that can be generated by volcanic activity, and the importance of accurate predictions of the spread of volcanic ash. Air traffic connected with northern Europe was disrupted for several days. More than 100,000 flights were cancelled, affecting around 10 million passengers. The economic impact of this disruption was considerable, with estimated losses to the airline industry alone of $1.7bn. The eruption led to changes in the permissible ash concentration through which aircraft can fly. Prior to this event aircraft were not allowed to fly in regions containing volcanic ash but after the widespread disruption in 2010, flying through volcanic ash was permitted but subject to the concentration. This presents a significant modelling challenge: where before it was sufficient simply to predict whether or not there was ash in the atmosphere at a certain location, now the amount is important as well.
The main aim of this project is to improve the representation of volcanic plume dispersal processes within the Met Office's operational dispersion model, NAME (Numerical Atmospheric dispersion Modelling Environment). In particular, we aim to include the effect of the plume spreading out as a gravity current once it reaches its final rise height. The development of a model within NAME that can account for such spreading will offer the possibility of more accurate forecasts in the event of a large volcanic eruption. The project will use High-fidelity Direct Numerical Simulation (DNS) and Large-Eddy Simulation (LES) simulate rising turbulent plumes in atmospheric boundary layers. The statistics from the simulations will be used to develop models capable of incorporating buoyancy effects into NAME.
Applicants should hold or expect to hold an MSc/MEng in mathematics, physics, engineering or meteorology, and have a background in numerical modelling and programming. Experience with high performance computing is beneficial but not strictly required. If you would like further information about this project, please contact Maarten van Reeuwijk on m.vanreeuwijk@imperial.ac.uk<mailto:m.vanreeuwijk@imperial.ac.uk>.
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Dr Maarten van Reeuwijk
Section of Fluid Mechanics
Dept. of Civil and Environmental Engineering
Imperial College London
London SW7 2AZ
Tel. +44 (0)20 7594 6059
Fax +44 (0)20 7594 5991
www.imperial.ac.uk/people/m.vanreeuwijk<http://www.imperial.ac.uk/people/m.vanreeuwijk>
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