Coalescence filters are used to separate the finest oil droplets in a compressed air pipe. These usually consist of layers of porous non-woven filter media made of microglass fibers or polymer fibers, followed by a support structure and a drainage layer on the back of the filter. The drainage materials are used to minimize the reintroduction of the separated liquid into the clean gas. In addition, the use of drainage materials should ensure better drainage of the liquid. The start of drainage is associated with a minimum saturation of the material, and too slow drainage can lead to a locally more saturated zone ("wet-band").

This work aims to compare different methods for analyzing the capillary rise height of drainage materials to conclude material properties and minimum saturation. The experimental investigation includes the comparison of different methods, known from the literature ("dipping method"), as well as industrially applied methods ("drain method") of different materials (PET, PUR foams, etc.) and different oils. For this purpose, a suitable test stand is to be set up to repeat the respective methods in a reproducible manner. The results obtained from the tests will then be compared with literature values and, if necessary, modeled.

What I can offer you:

• Regular contact with my students to mentor them and am available for support in case of problems
• Freedom for your ideas in the final project

Your tasks include:

• Creation and follow-up of a project plan for your thesis
• Setting up a test rig to investigate the capillary rise height
• Carrying out, analyzing, and comparing the different methods
• Comparison of the results obtained with known literature values

What you should bring with you:

• Interest in putting theoretical questions into practice
• Ability to communicate
• Goal-orientated work, initiative

Conctact:
Robin, Mandic, M.Sc.
Email: robin.mandic∂kit.edu
Tel: +49 721 608-42416
Strasse am Forum 8
Bldg. 30.70, Room 107
76131 Karlsruhe