September 30, 2019
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A member of the Helmholtz Association of German Research Centers, the HZDR employs about 1,200 people. The Center’s focus is on interdisciplinary research in the areas energy, health and matter.
The Institute of Fluid Dynamics is conducting basic and applied research in the fields of thermo-fluid dynamics and magnetohydrodynamics in order to improve the sustainability, the energy efficiency and the safety of industrial processes.
As part of the Institute, the Department of Magnetohydrodynamics, invites applications as Research Associate/Postdoc (m/f/d).
The position will be available from 1st January 2020. The employment contract is limited to three years.
The appearance of thermal superstructures in turbulent convection within very low Prandtl number fluids will be investigated experimentally in a large aspect ratio domain. The experiments will be conducted using the liquid metal Gallium-Indium-Tin (GaInSn) that has a Prandtl number of 𝑃𝑟 ≈ 0.03. Combined temperature and velocity measurements will provide detailed information about turbulent, convective superstructures and their dynamics. A novel Ultrasound-Doppler-Array technique will be used to measure for the first time two dimensional velocity vector fields of the superstructures in a turbulent liquid metal convection.
The project includes the following tasks:
- preparation and operation of a Rayleigh-Bénard convection cell for liquid metal
- measurements of global transport laws for heat and momentum
- simultaneous measurements of flow velocity using ultrasound Doppler velocimetry and temperature distribution using thermocouples
- investigation of the three-dimensional flow structure and dynamics of turbulent superstructures
- comparison of the results to direct numerical simulations (carried out by project partners)
- completed doctorate in physics, mechanical engineering or comparable qualification
- a strong technical and physical understanding is mandatory
- background knowledge on thermal convection would be advantageous
- high scientific professional networking as well as scientific excellence
- internationality and diversity
- interesting and diverse tasks, flexible working hours, salary based on the collective agreement TVöD-Bund
- equality of opportunity and family-friendly structures, corporate health management
- attractive work and research terms in a highly motivated team
Kindly submit your completed application (including cover letter, CV, diplomas/transcripts, etc.) only via our Online-application-system.
Online application English / German
August 21, 2019
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||2nd August 2019
||£32,243 to £40,802 per annum
||2nd September 2019
A Research Fellow position in theoretical fluid mechanics is offered at Coventry University (UK). The project concerns convection under a magnetic field in the so called “tangent cylinder” region of the Earth’s core. Much of the mystery surrounding the Earth’s dynamics (its magnetic field, plate tectonics) lies in the nature of the convective patterns within the Earth’s liquid core, and in particular in the region called the “Tangent Cylinder”. What are the possible convective states under the combined influence of the Earth’s rotation and magnetic field, and how erratic are they? This study is part of a theoretical and experimental research program funded by the prestigious Leverhulme Trust (http://www.leverhulme.ac.uk), that aims at answering these questions. The purpose of this thesis is to theoretically predict the possible nonlinear convective states for the first time. We will then evaluate which of these states are mostly likely to underpin the Earth’s core convection.
The Research Fellow will conduct the theoretical and numerical analysis of the problem under the joint supervision of Prof. Alban Pothérat (http://users.complexity-coventry.org/~potherat/index.html) and Dr Chris Pringle. The study will seek the possible structure of convection by means of advanced stability theory and branch tracking method, to unveil the possible states. In the frame of the research programme, the work is purely theoretical/numerical and will be conducted in collaboration with an experimental study that will seek to reproduce and visualise these non-linear states in an experimental model of the Earth Core.
Successful candidates are expected to hold a PhD in fluid mechanics or a related discipline and to have demonstrated excellent abilities in mathematics and programming.
The successful candidate will be part the vibrant team of internationally recognised academics and PhD students forming the fluid dynamics group within the Applied Mathematics Research Centre, whose work has been ranked at 83% world-class at the UK’ latest Research Excellence Framework in 2014. This unit is part of the Fluid and Complex Systems Research Centre, and specialises in theoretical and experimental fluid mechanics. It is especially renowned for its work on magnetohydrodynamics (MHD), turbulence, stability and geophysical flows. The group closely collaborates with partner groups in world-leading institutions in Australia, China, France, Germany and the UK.
Informal enquiries are welcome: please forward a CV and academic records to Prof. Alban Pothérat (firstname.lastname@example.org).
Refs.:: Laboratory model for the convective patterns in the Tangent Cylinder of the Earth core (Aujogue, Pothérat, Sreenivasan & Debray, 2018, Journal of Fluid Mechanics)
June 18, 2019
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(From Andrew Kao, UK)
PhD Scholarship: Energy Saving Induction Melting by Electromagnetic Containment
Location: Computational Science and Engineering Group, University of Greenwich, Old Royal Naval College, Park Row, London, SE10 9LS
Duration: Bursary available for 3 years. Year 1: £15,009, Years 2 and 3: in line with RCUK rate
Starting date: 1 September, 2019
Application Deadline: 10 July, 2019
Further information: https://www.gre.ac.uk/research/study/research-studentships-and-scholarships
Contact: Dr Andrew Kao (email@example.com)