Opportunities for PhD students

Posted: July 4, 2017 in Belgium, Europe, Jul-Sept Deadline, Other/Jobs
Tags: ,
Last application date
Aug 12, 2017 23:59
Department
TW11 – Department of Materials, Textiles and Chemical Engineering
Contract
Limited duration
Degree
MSc in Chemical Engineering or related subject
Occupancy rate
100%
Vacancy Type
Research staff

Job description

Prediction of Turbulent Reactive Flows by means of Numerical Simulations (PRETREF)

Aim
The goal of this PhD is coupling detailed kinetic models for free radical and surface processes with Computational Fluids Dynamics (CFD) accounting properly for turbulence.

Justification
The 20th century has proven to be a fruitful century in modeling chemical reactors using simplified reactor models and simplified kinetic models. Hence, there’s a good reason to believe that many of those systems are actually far from optimal. Indeed, the supercomputer capabilities in the 21th century make that on a computational level new innovations are possible that 5 years ago one could not even dream of. The current state of the art in CFD makes use almost exclusively of traditional Reynolds-Averaged Navier-Stokes (RANS). The main limitation of RANS modeling is that RANS variables do not depend on time and only averaged flow fields are obtained of which the accuracy can be debated. It must be clear that an instantaneous and averaged turbulent flow field have not much in common. Also intuitively it seems obvious that certain phenomena can simply not be averaged like ignition, quenching, flow instabilities, acoustic waves and thermoacoustics. Note that implementation of detailed chemistry in CFD is at present almost not done, not even when simple turbulence models are used.

Program
Coupling detailed kinetic models with OpenFOAM accounting properly for turbulence. The approach will be validated using a unique set of newly acquired experimental data on the flow field in well-defined reactor geometries using 2D/3D Particle Image Velocimetry (PIV) and liquid crystal thermography. Implementation of kinetic models with more than 50 species In OpenFOAM using LES. Therefore a dynamic kinetic model reduction method will be developed for the OpenFoam platform in order to drastically decrease the required CPU time. This will be combinend with the classical tools for obtaining reduced chemistry, i.e.: quasi steady state approximation, rate of production and sensitivity analysis. Evaluate the developed OpenFOAM LES code for low NOx burners, pyrolysis and selected surface reactions.

Profile of the candidate

Applicants must possess a MSc in Chemical Engineering or related subject and a TOEFL certificate with a minimum score of 95(iBT) or equivalent. Relevant experience in the area of reactor engineering, kinetics, and/or computational chemistry is strongly recommended. Candidates must have a strong mathematical background and be willing to focus on obtaining quantitative rather than qualitative results.

How to apply

Any additional information can be obtained by contacting . Any application should enclose a C.V., a one page justification of your interest and the e-mail addresses of at least two references. Unsolicited applications are always welcome

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