1. The Helmholtz Centre Dresden-Rossendorf (HZDR) invites for applications concerning a PhD position within a project devoted to the further development of the Contactless Inductive Flow Tomography (CIFT) for flow measurements in electrically conducting flows. The availability of appropriate measurement techniques is a necessity for any experimental work on liquid metal technologies. Exposing the flow of liquid metals like steel or silicon to an externally applied magnetic field, electrical currents are induced which give rise to a perturbation of the applied field. This flow induced field perturbation, which is detectable outside the fluid volume, contains information about the flow structure and can be exploited to reconstruct the velocity field. Previous tests at laboratory scale revealed a great potential of the CIFT method for the online monitoring of flow structures in real industrial processes.Applicants must have a master degree in physics, electrical engineering or fluid engineering.
2. The Helmholtz Centre Dresden-Rossendorf (HZDR) invites for applications concerning a PhD position within a project devoted to experimental investigations with respect to the behaviour of gas bubbles and bubble swarms in liquid metal flows. Many technical applications in power engineering, metallurgy and casting rely on liquid metal two-phase flows. In metallurgy, gas injection is routinely applied at various stages to promote chemical reactions and to stir the melt for reducing temperature and/or concentration gradients together with promoting an effective removal of impurities. On the other hand, gas entrainment into liquid metal coolants is an essential safety issue in the design of liquid metal cooled fast reactors. Visualizations of liquid metal two-phase flows can be obtained by means of X-ray radioscopy. The formation, the coalescence and breakup of gas bubbles will be observed in low melting point alloys. The method delivers data about the size, the velocity and the trajectory of the bubbles. This information will be used by another partners in the project to develop advanced models of bubble coalescence and breakup for liquid metals.Applicants must have a master degree in physics, electrical engineering or fluid engineering.
3. The Helmholtz Centre Dresden-Rossendorf (HZDR) invites for applications concerning a postdoc position within a project devoted to the development of casting technologies ODS steels. Oxide dispersion strengthening (ODS) of high-Cr steels is a promising way to get materials for high-temperature applications. The mechanical and corrosive properties are significantly improved compared to present-day steels. However, it is difficult to disperse ceramic particles uniformly in liquid metals because of their poor wettability and their large surface-to-volume ratio, which easily induces agglomeration and clustering. In case of nano-dispersed aluminum alloys the homogeneous distribution of nano-particles has been obtained by ultrasonic vibration of the melt. This project focuses on the problem whether alternating electromagnetic forces can be designed in such a way that an intense vibration of the melt can be achieved, similar to the case of ultrasonic vibration. The possibility of creating electromagnetically induced pressure waves in a metal melt shall be investigated.Applicants must have a PhD in physics or engineering with a strong background in material science, fluid mechanics or magnetohydrodynamics.All position are available from June 1, 2013 until May 31, 2016. A prolongation until October 2017 is conceivable.

Applications should be sent to Sven Eckert (s.eckert(at)hzdr.de) or Gunter Gerbeth (g.gerbeth(at)hzdr.de) before May 31st.

Many thanks and best regards
Sven

Sven Eckert
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Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Institute of Fluid Dynamics
Head of the Department Magnetohydrodynamics
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Contact:
Bautzner Landstraße 400, 01328 Dresden
P.O. Box: 510119, 01314 Dresden
Tel. +49 351 260-2132 (Office)
Fax: +49 351 260 1 2007
s.eckert(at)hzdr.de

LECTURER/SENIOR LECTURER IN FLUID MECHANICS

Salary per annum : £29,344-£37,346 (L)/£35,247-£50,187(SL)

The Fluid Dynamics Group within the Applied Mathematics Research Centre at Coventry University is seeking to appoint a Lecturer/Senior lecturer in fluid mechanics to support its growing activities in the fields of geophysical fluid dynamics and turbulence.

The Group currently comprises 7 Staff and PhD students and runs projects combining theory, numerical simulations and experiments, supported by a number of grants from research funding bodies and international partnerships. It has priority access to extensive on-site high performance computing provisions and runs two major experimental facilities: a magnetohydrodynamics lab, which includes a large bore, purpose-built 8T superconducting magnet, as well as a modular experimental platform for the study of turbulence in liquid metals, in collaboration with the French CNRS in Grenoble.

The successful candidate will be expected to primarily focus on research, and will benefit from a reduced teaching load for this purpose. He/she will help to develop existing themes in geophysical fluid dynamics and turbulence, and to extend the group’s existing long-term international collaborations (with the CNRS amongst others). At the same time, the appointee will be encouraged to start new directions of research, within the wide remit of fundamental and applied Fluid Dynamics.

Research activity will involve leading and co-leading projects both theoretical/numerical and experimental in nature, supervising PhD students and post doctoral researchers, and actively seeking funding, from national and international funding agencies, or from private funders.

The smaller teaching role will involve helping to develop and teach courses at Master level in Applied Mathematics/Physics, as well as some undergraduate teaching.
Candidates should hold a PhD or equivalent in any area of fluid mechanics/physics and have an established track record of publishing their work in the best international journals in the discipline. Evidence of previous commitment to attract research funding from major agencies or private funders will be an advantage.
The post will be for an initial period of four year and will be made permanent on satisfactory performance.

Informal inquiries are encouraged, please contact Professor Alban Potherat (alban.potherat(at)coventry.ac.uk, +44(0)2477 65 88 65 (email only from April)),

Application deadline 20/04/2013
Application must be made online at
https://staffrecruitment.coventry.ac.uk/tlive_webrecruitment/wrd/run/ETREC105GF.open?WVID=1861420Izv

Length: 3 year studentship
Funded by: Plas@Par excellence laboratory – University Pierre & Marie Curie, Paris
Maintenance grant: €1,700 per month (http://plasapar.upmc.fr/?page_id=544)
Supervised by: Dr Jean Larour, Dr Chantal Stehlé
The proposed enrolment date is 1st October 2013
The deadline for application is 15th May 2013.

Details of proposed research

Strong shocks are present in astrophysics, from stellar infancy (matter accretion from stellar disk to the young star, ejection in plasma jets) to supernovae explosion. Topology and dynamics are complex: roles of radiation, NLTE cooling or B-field. It is crucial to study such hypersonic shocks (Mach number>20) in the laboratory and to compare with simulation. So far, studies are done on large lasers, addressing pure hydro-radiative shocks (50-150km/s, 0.1-1bar). The project extends the class of shocks in radiative regime, at lower velocities, using a flexible and repetitive setup.

The PhD student will first perform experiments on a versatile kJ-class generator launching quasi-planar shocks up to 20km/s in low density gas. The setup is currently upgraded to get higher velocities, allowing to study various regimes of shock waves, depending on the gas, pressure and external B-field. The main task will be to design, to implement and to exploit a comprehensive suite of diagnostics of the shock plasma, the data being used to build a model and to benchmark 2-D or 3-D codes. These shocks will be used to prepare new diagnostics in view of foreseen experiments on laser-driven shocks.

Successful applicants must hold a Master of science in engineering, physics, astrophysics or equivalent. A previous experimental experience, in data acquisition or computer simulation is a merit, as a high evel in french or english. Please send your CVs to Dr Jean Larour (jean.larour(at)lpp.polytechnique.fr) and Chantal Stehlé (chantal.stehle(at)obspm.fr)

PDF version: PhD studentship at Ecole Polytechnique

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Jean LAROUR
Laboratoire de Physique des Plasmas LPP
Ecole polytechnique 91128 Palaiseau
tel 33(0)169 33 59 54 fax 33(0169 33 59 06
jean.larour(at)lpp.polytechnique.fr
http://www.lpp.fr

One research engineer/project manager position is available starting from February 2013 in the Atomistic Simulation & Energy (A.S.E.) research group at Georgia Tech. The primary function for this position is to lead the construction and testing of two lab scale prototype high temperature liquid metal loops for a concentrated solar application. One liquid metal loop will be tested in a solar simulator, while the second test loop will involve thermochemical reactors designed for water splitting/hydrogen production. The idea (see Fig. 1 on page 2) is to capture highly concentrated sunlight (> 5 MW/m2) at high temperature > 1300°C in the sensible heat of a liquid metal heat transfer fluid (i.e. tin). The sensible heat can be later used for direct power generation or thermochemical fuel production (water splitting) as a new route to clean, renewable and dispatchable utility scale electricity generation.

More details here: Open Positions – Research Engineer

Please send a CV, representative publications, a short one paragraph description of career goals and why you’re interested in this project, as well as contact information for three references to Asegun Henry (ase(at)gatech.edu). Review of applications will start immediately and will continue until the position is filled.

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Asegun Henry, Ph. D.
Woodruff School of Mechanical Engineering
Georgia Institute of Technology
495 Tech Way, CNES Bldg, Rm 223
Atlanta, GA 30332
Office Phone: 404-894-7514
ase(at)gatech.edu
http://www.me.gatech.edu/faculty/henry-a