Project description
Film blowing is one of the important polymer shaping processes. Both, material characteristics (molecular weight distribution, molecular architecture, etc.) and processing conditions (temperature history, deformation rates, etc.) determine the final film properties. The interplay between these two (material and process characteristics) is rather complex; especially in the case of semi-crystalline polymers. The non-isothermal, biaxial deformation of the melt, coming out of an annular die, will not only cause an anisotropic crystalline structure but also enhance the crystallization kinetics and determine the morphology of these structures. A detailed general description of the coupling between flow and crystallization is available. The goal of the project is to combine this with a model for the film blowing process so it is possible to predict the resulting crystalline structure.
This project is a collaboration with ExxonMobil, Baytown USA.
Tasks
After a literature study on film blowing, flow induced crystallization and non-linear viscoelastic flow modelling (as far as each of these topics requires) the candidate should get acquainted with in-home software packages for viscoelastic flow simulations. Next a start can be made with the model development. The focus will be on viscoelastic behaviour and a free surface description.Next the crystallization part will be implemented and tested. Here the focus is on the coupling rheology/crystallization. The final numerical simulations will include the analysis of influence processing conditions and rheological parameters on structure development.
Besides a numerical code for film blowing simulations also two journal publications are expected as a result of this project.
Requirements
We are looking for a candidate who meets the following requirements:
- A PhD degree in Physics, Numerical Mathematics or Mechanical Engineering
- A good background in polymer physics and fluid mechanics.
- Some experience with computational fluid dynamics is an advantage
- Excellent communication skills and written/verbal knowledge of the English language
Appointment and Salary
We offer:
- A challenging job at a dynamic and ambitious University
- An appointment for two years (start date as soon as possible)
- Gross monthly salaries are in accordance with the Collective Labor Agreement of the Dutch Universities (CAO NU), increasing from € 2861 per month initially, to € 2977 in the second year.
- An attractive package of fringe benefits (including excellent work facilities, end of the year allowance and sport facilities)
Information
More information can be obtained from:
- http://www.tue.nl
- http://www.mate.tue.nl
- Gerrit W.M. Peters, phone +31 (0)40-2472851, e-mail g.w.m.peters@tue.nl
Application
Please send your application with extended curriculum vitae, mentioning vacancy number V35.1303
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