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CHAIR OF SIMULATION AND MODELING METALLURGICAL PROCESSES

Open Positions

Ph.D. student / Postdoc position in Metallurgical Engineering

Department Metallurgy, Montanuniversitaet Leoben, Austria

The chair of Simulation and Modelling of Metallurgical Processes at the Department Metallurgy of the Montanuniversitaet Leoben ( http://smmp.unileoben.ac.at) offers a Ph.D. / Postdoc position in the area of convective mass transfer, alloy solidification and numerical process simulation. Based on an unusual observation of crystal avalanches during dendritic solidification of ammonium chloride-water alloys, their occurrence should be investigated systematically. Beside planning and construction of corresponding experiments, the occurring velocity field should be measured with PIV and the whole process should be modelled by numerical simulation. Both, the experimental work as well as the numerical simulations will be done in close cooperation with an English speaking international team. The project is limited to three years.

Candidates should have a master-equivalent degree in technical or physical sciences. The working language is English.

Required skills:

  • Comprehensive knowledge in either alloy solidification, Particle-Image-Velocimetry (PIV), or numerical process simulation
  • Excellent knowledge of English (speaking and writing)
  • Ability of planning and writing scientific papers
  • Independent and self-motivated working
  • Capability for teamwork
  • Good IT skills

Job Description:

  • Carrying out research on the aforementioned topic
  • Writing a Ph.D. thesis or a Ph.D. equivalent report within a given time frame
  • Publication and presentation of the scientific work in journals and at international conferences
  • The employment is limited to three years
  • The yearly gross salary for Ph.D. students is € 41,600.-- (working time 40 hours/week). The salary for a Post.Doc depends on the prior experience and is higher than approximately € 54,000.--.
  • An estimate for the net salary can be calculated at https://www.bruttonettorechner.at/

The Montanuniversitaet is an equal opportunity employer.

Please send your application with personal and scientific data and a compact statement about scientific interests and achievements to: info.smmp(at)unileoben.ac.at.

 

 

Master thesis

Master thesis I: Simulation of distribution of non-metallic inclusions in an ESR ingot

Background

Electroslag remelting (ESR) is a secondary metallurgical process aiming at further purification after completion of the primary extraction and refining operations. The process, as shown in the figure, is a method of refining a consumable metal electrode through a molten slag that is electrically heated. Distribution, type and size of non-metallic inclusions in the final ingot are of great interest. It is generally believed that they can have a significant impact on the mechanical properties and corrosion resistance of the final ingot.

Objective

The goal of this project is to establish advanced models in which the coupling between behavior of inclusions and magnetohydrodynamics (MHD) phenomena in the ESR process is taken into account. The final results might be considered to be published in a scientific journal authored by the student and supporting faculty. The following tasks are identified as project milestones:

  • An extensive literature review on the origin, distribution, type, and size of inclusions in the ESR process.
  • Modeling distribution of inclusions in the ESR ingot using computational fluid dynamics (CFD) tools.
  • A parameter study on the effect of process parameters such as AC applied frequency or slag electrical conductivity on the distribution of inclusions in the ingot.
  • Validation of results against the experiment.

Prerequisites

    The student must have a background in applied mathematics or physics or engineering e.g. mechanical, chemical, metallurgical engineering, etc. A basic knowledge of numerical modeling as well as CFD simulation using the commercial software ANSYS-FLUENT is required.

Master thesis II: Simulation of ESR processes with current source through the mold (ESRR/CCM)

Background

Nowadays, the standard electroslag remelting process (ESR) might be slightly modified to produce ingots with special characteristics. The demand to apply the well-known industrial processes such as electroslag rapid remelting (ESRR) and current conductive mold (CCM) is rapidly growing. As shown in the figure, a T-shaped mold is used in the ESRR process including a graphite ring that takes major amount of current through the mold. Furthermore, a certain amount of input power is introduced to the slag through the mold by applying a stirring current in the CCM process.

Objective

The goal of this project is to refine the previously developed computational fluid dynamics (CFD) model for the standard ESR process. Then, the newly refined model is applied to study ESRR/CCM process. The final results are considered to be published in a scientific journal or to be presented in an international conference authored by the student and supervisors. The following tasks must be performed:

  • 2D/3D Modeling of the electromagnetic field in the ESRR/CCM process using ANSYS-FLUENT or ANSYS-MECHANICAL APDL
  • Investigation of temperature and flow fields in the ESRR/CCM process using CFD tools.
  • Validation of results against the experiment.

Prerequisites

    The student must have a background in applied mathematics or physics or engineering e.g. mechanical, chemical, metallurgical engineering, etc. A basic knowledge of numerical modeling as well as CFD simulation using the commercial software ANSYS-FLUENT is required.

Please contact us under "ebrahim.karimi-sibaki@unileoben.ac.at"