Studienarbeiten


2 Bachelor-Projects - Chemical Engineering (Verfahrenstechnik)

Experimental Evaluation of a Particle Fractionator

Current trends in paper and pulp production aim on product diversification covering new markets, i.e. fibre-plastic compounds. Separating fibres and fines (i.e., particles smaller than 200μm) may become a crucial process step in future. Answering to this future need, we developed a novel fractionation device in a collaborative project with industry.

First studies revealed a dependence of the separation performance on key flow parameters, and was investigated by means of high-speed imaging (Figure 1, right panel).

 


Figure 1: Illustration of the fractionation device. (© Jakob D. Redlinger-Pohn, IPPT, TUG)

Bachelor projects will aim on detail investigations of how the fibre network formation affects separation performance. The bachelor students will receive training in the handling of the fractionator, image recording and post-processing with our existing high-speed camera.


We offer

  • high industrial and scientific relevance (i.e., a novel separation process which will be applied in “real-world” trials at a paper mill)
  • bleeding edge high-speed camera equipment and image post-processing routines
  • desk and office space

 

Contact

Jakob D. Redlinger-Pohn, redlinger-pohn(at)tugraz.at; 0316 873 30421

The bachelor thesis projects can be started earliest by May 1st 2017 and latest in July 1st 2017.


Construction Thesis Project - Chemical Engineering (Verfahrenstechnik)

Design and Construction of a Particle Fractionation Unit

Current trends in paper and pulp production aim on product diversification covering new markets, i.e. fibre-plastic compounds. Separating fibres and fines (i.e., particles smaller than 200μm) may become a crucial process step in future. Answering to this future need, we developed a novel fractionation device in a collaborative project with industry.

First studies aimed on the investigation of key process parameters by means of optical imaging, resulting into a rectangular channel design (Figure 1), which however is not best suited for industrial use. Following we will re-design the fractionator for industrial use.

 


Figure 1: Illustration of the fractionation device. (© Jakob D. Redlinger-Pohn, IPPT, TUG)

 

The goal of the construction thesis is to implement a single-fractionation line favoring industrial use. The student will need to prepare construction drawings using CAD, preferably Autodesk® Inventor. Prior skills from technical high-school are of advantage. The final fractionator will be evaluated by means of experimental trials.

We offer

  • high industrial and scientific relevance (e.g., novel separation process with future application in paper and pulp industry)
  • desk and office space


Contact

Stefan Radl, radl(at)tugraz.at, 0680 / 12 22 168

Jakob D. Redlinger-Pohn, redlinger-pohn(at)tugraz.at, 0316 873 30421

The thesis should start in August 2017.


Master Thesis Project - Chemical Engineering (Verfahrenstechnik)

Up-Scale Study of Laboratory Fractionator for Industrial Use 


Current trends in paper and pulp production aim on product diversification covering new markets, i.e. fibre-plastic compounds. Separating fibres and fines (i.e., particles smaller than 200μm) may become a crucial process step in future. Answering to this future need, we developed a novel fractionation device in a collaborative project with industry.

First studies resulted into the development of a low-energy separation unit, which was successfully demonstrated on the laboratory scale. The next step is the process up-scaling to demonstrate process feasibility on a pilot-scale. The goal of the master thesis is the planning, construction, and performance evaluation of critical components needed to split and combine a pulp suspension (see Figure 1). Newest imaging methods shall be used therefore.

Figure 1: Illustration of the fractionation process
(
© Jakob D. Redlinger-Pohn, IPPT, TUG)

The master student will need to draw construction plans using CAD, preferably Autodesk® Inventor.
Prior skills from technical high-school are of advantage. The master students will receive training in the handling of the fractionator, image recording and post-processing with our existing high-speed camera.
 

We offer

  •  high industrial and scientific relevance (i.e., a novel separation process which will be applied in “real-world” trials at a paper mill)
  • bleeding edge high-speed camera equipment and image post-processing routines
  • support from the project team at IPPT and IPZ
  • desk and office space
  • Remuneration: 6 months á 440€.




Contact
Stefan Radl, radl(at)tugraz.at, 0680 / 12 22 168
Jakob D. Redlinger-Pohn, redlinger-pohn(at)tugraz.at, 0316 873 30421

The master thesis should start in summer 2017.


Modeling of Cohesive Particulate Matter on the Computer

Cohesive particulate matter is of central importance for chemical engineering, as well as a plurality of other sciences, e.g., space or earth sciences that are interested in the mechanical properties of particulate systems. While a variety of particle-scale models for cohesive systems are available (e.g., models for van der Waals forces), the effect of model details on bulk properties (e.g., the yield locus, or the bulk density) are not well explored. Also, most available force models were built for infinitely stiff particles. This image of infinitely stiff particles conflicts with the assumption of Discrete Element Method (DEM)-based simulators that rely on (often very) soft particles.

We are looking for two enthusiastic students. More details are available HERE.

We offer

·           high industrial and scientific relevance (e.g., for powder processing, petroleum engineering, or space science)

·           computer(s) with installed, fully documented, and tested DEM simulation software LIGGGHTS®. Tutorials, screencasts, and personal training on the DEM simulator can be provided. Based on the interest of the student(s), an introduction to C/C++ programming can be provided to allow students to extend the simulation software

·           desk and office space for writing the bachelor thesis

 

Contact

Stefan Radl, radlnoSpam@tugraz.at; 0680 / 12 22 168. The bachelor thesis projects can be started earliest by April 1st 2017. However, thesis work during the summer months would be preferred.


Paid Master Thesis - Concept development of a manual capsule opening device

Swallowing issues of standard tablets and capsules is an increasing issue in delivering especially higher dosed medicines to patients. One of the most promising approaches is the use of small multiparticulate systems that can be dispersed in food or beverages for administration. In order to achieve a precise dose of the medicine, a precise dose of multiparticulates is filled into two piece capsules, which are opened before the administration.

This thesis will focus on the engineering concept development of a capsule opening device by simple manual opening mechanism. This master thesis will include a variety of different research tools from literature research to engineering concept development and preliminary functional assessment. The master student will be supervised by myself and supported by PhD students.

 

Requirements

·         Understanding in mechanical systems and engineering

·         Motivation and creativity towards problem solving

·         Interest in working on medical device development and human factored design

We offer

·         A project that matters the patient and is highly relevant for the pharmaceutical industry

·         A thesis in the fast evolving field of patient centric drug products

·         Coaching and career development support

·         Financial support during the thesis work

 

Contact

Univ.-Prof. Dr. Sven Stegemann

TU Graz - IPPT

e-mail: sven.stegemann@tugraz.at

Phone: +43 316 873 0422


Characterization of the Microenvironment in a Film Coater

Detailed understanding of film coating processes is of utmost importance for designing drug products that are sensitive to heat and moisture during production. Conditions such as the local temperature (of tablets or particles), local humidity, as well as the film thickness on the particles are critical quality attributes that determine film formation. Unfortunately, there is a lack of quantitative information on how these critical quality attributes affect the coating process. Since it is tedious to perform experimental studies to answer such questions, simulations can help in collecting data to establish a quantitative and mechanistic understanding of the coating process. 

The thesis‘ work will focus on performing a literature research on film coating and drying process, characterization of the „microenvironment“ by means of dimensionless numbers, and computer simulations to quantify the relevance of these dimensionless numbers on the coating process. For the latter, computational tools will be used to simulate the coating and drying of liquid film on the spherical particles. Theoretical developments will complement computational work. 

Requirements

  • strong background in particle technology and/or heat and mass transfer,
  • motivation to conduct state of the art computer simulations, and
  • programming skills (Matlab; knowledge of C/C++ is a plus, but not required)

We offer

  • a topic relevant for many industries, and hence for your future career as an engineer;
  • advice with respect to literature data, software, as well as financial support.

Contact: Ass.-Prof. Dr. Stefan Radl  (radl@tugraz.at, 0680/12 22 168)
Possible Start Date: February 2015 or later

Master thesis Characterization of microenvironment in a coater


Nach oben

Diploma or Master Thesis in Cooperation with AVL List GmbH

Effect of Particle Parameters on the Initiation of Condensation

Prediction of the condensation rate of vapors on particles is of fundamental interest for a variety of engineering applications, like nano particle detection, application of coatings to nano particles, or the formation of clouds in the atmosphere. Specifically, the very early stage of the condensation process, typically referred to as nucleation, is of interest, since this stage determines whether condensation does occur or not. Starting with the seminal work of Fletcher (1958), a sound theoretical framework for heterogeneous nucleation on spherical particles has been built in the last decades. Unfortunately, there are significant gaps in our current understanding of the condensation rate on particles with a more complex morphology. The proposed Master Thesis aims on providing a theoretical basis for closing this gap.

The thesis’ work will focus on developing a theoretical understanding of the effect of the contact  angle and the morphology of the particle on the initiation of condensation. Specifically, the thesis  should include (i) an analysis of relevant literature, (ii) computational studies to investigate the shape of liquid droplets on a variety of morphologically-complex particles, as well as (iii) a theoretical analysis to predict heterogeneous nucleation phenomena on these particles.
This thesis is sponsored by a world-wide leading company in the field of particle analysis, i.e., AVL List GmbH. Appropriate financial and technical support will be provided by AVL List GmbH (€ 2500, plus optional extra payment of € 800); academic supervision will be provided by the Institute of Process and Particle Engineering.

Requirements

  • excellent background in fluid mechanics and particle technology,
  • motivation to conduct state of the art computer simulations, and
  • programming skills (i.e., Matlab)

We offer

  • a topic relevant for many industries, and hence for your future career as an engineer;
  • direct contact with researcher from a leading company in the field;
  • advice with respect to literature data, software, as well as financial support.  

Contact
Dr. Stefan Radl, TU Graz (radlnoSpam@tugraz.at; 0680 / 12 22 168)
Dr. Alexander Bergmann (alexander.bergmannnoSpam@avl.com)
DI Tristan Reinisch (tristan.reinischnoSpam@avl.com)

Start Date April 2015


Nach oben

Kontakt
image/svg+xml
Mag.phil. Michaela Cibulka

Institut für Prozess- und Partikeltechnik
Inffeldgasse 13/III
8010 Graz

Tel.
+43 (316) 873 - 30403
Fax
+43 (316) 873 - 1030403
Sprechstunden
nach Vereinbarung