Heike Gramberg

Technical Specialist at Mecal
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Contact Information
Location
Eindhoven, North Brabant, Netherlands, NL
Languages
  • Dutch Native or bilingual proficiency
  • English Full professional proficiency

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Experience

    • Jordan
    • Retail Luxury Goods and Jewelry
    • 1 - 100 Employee
    • Technical Specialist
      • Jul 2015 - Present
    • Consultant Industrial Mathematics
      • Jul 2012 - Mar 2015

      CelSian Glass and Solar is a small company specialized in performing lab-tests, on-site measurements and numerical modelling studies for glass manufacturing companies. As a member of the modelling group, my responsibilities included the development and implementation of mathematical models in MATLAB and GTM-X, which is an in-house developed CFD package specialized in simulating the flow behaviour and heat exchange in glass melting furnaces. Other responsibilities included setting up case studies in GTM-X, performing numerical simulations of flow, and analysing the results in order to provide advice to external clients. Show less

    • United Kingdom
    • Research Services
    • 700 & Above Employee
    • Postdoctoral Researcher
      • 2010 - 2011

      This project deals with the impact of a free falling wedge with a stationary layer of water. During the initial stages of impact, there is a small region near the contact points between the free surface of the liquid and the solid object, the so-called Wagner region, where the pressure becomes singular. This region forms a bridge between the flow in the bulk of fluid and a thin jet region where fluid is propelled upward.During this project, a first-order approximation of the flow near a wedge falling at constant speed was extended to include the second-order terms In order to fully describe the coupling between these regions. Also, this model was adapted to include the acceleration of the wedge due to gravity and buoyancy. These results were compared to experimental data. Show less

    • Postdoctoral Researcher
      • 2009 - 2010

      The subject of this project was the modelling of the motility of trypanosomes and leishmania. Trypanosomes are one-celled organisms which propel themselves using flagellar beating similar to for instance spermatozoids. During this project the motility of these organisms was studied by modelling the interaction between the organism and the surrounding fluid. As part of the project, experimental data was collected by recording the movement of these organisms in vitro using a high-speed camera. The images were analysed and compared to the analytical model. This research was done in collaboration with the Sir William Dunn School of Pathology in Oxford. Show less

    • Postdoctoral Researcher
      • 2006 - 2009

      Oxford Centre for Applied an Industrial MathematicsThis project focussed on the formation sub-glacial landforms. It was part of a larger interdisciplinary project funded by NERC. The goal of this project was to test the hypothesis that landforms such as ribbed moraines and drumlins are formed due to a shearing instability between an ice sheet and the deformable sub-layer. This was done by modelling the interaction between the two layers both analytically using perturbation methods and numerically using finite difference methods. The results of these models were used to make estimates of various physical parameters in the model by comparing them with statistical data collected from the analysis of digital elevation maps. Show less

    • Postdoctoral Researcher
      • 2005 - 2006

      Oxford Centre for Applied an Industrial Mathematics, Oxford UniversityDuring this project various problems from the glass industry were studied such as the modelling of convective flows in a batch melting process and buckling induced delamination of coated glass. This project was part of a Research Training Network called Mathematics for the glass industry: computing and analysis (MAGICAL) which was a international project funded by the EU aimed at stimulating the cooperation between research institutes and industry.The main part of the project consisted of modelling convective flows in a glass furnace. During this project an analytical relationship was derived between the thickness of the flow region and various physical parameters as well as an analytical expression for the flow profile over the thickness of the bath. These results were backed up with numerical calculations. Show less

    • Netherlands
    • Research Services
    • 700 & Above Employee
    • PHD Student
      • 1998 - 2005

      Subject of my thesis: Flow Front Instabilities in an Injection Moulding Process The research program carried out and described in the PhD thesis focuses on the modelling of an injection moulding process. An injection moulding process is often used for producing plastic products and consists of injecting hot molten plastic into a mould. In many cases not only mechanical but also optical properties of the product of relevant. Internal stresses and deformations of the surface can diminish these properties. One of the processes thought to be responsible for these kinds of deformations is an instability of the flow during the filling phase of the mould. This instability is induced by a difference in viscosity of the fluid near walls of the mould and the bulk of the flow due to the temperature gradient. The aim of this research was to investigate the occurrence of this instability in the case of the injection moulding process of thin disks. In order to do this an analytical model was derived describing the velocity profile and temperature distribution in the unperturbed flow. A linear stability analysis was performed which resulted in an estimate of the parameter regime for which instabilities occur. Show less

Education

  • Eindhoven University of Technology
    Master's Degree, Applied Mathematics
    1995 - 1998
  • Eindhoven University of Technology
    Bachelor's Degree, Applied Mathematics

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