University of Twente Student Theses


A Code for Refractive Index Matched Scanning Data Processing

Polman, Harmen (2019) A Code for Refractive Index Matched Scanning Data Processing.

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Abstract:Granular materials can segregate due to differences in particle properties. One of the properties that can lead to segregation is size differences between particles. Several different mechanisms can play a role in size segregation, but the exact principles behind these mechanisms are still poorly understood. Refractive Index Matched Scanning (RIMS) is a method that employs an index matched solution and a laser sheet to produce slices of a particle configuration. One of the main objectives of this thesis was to continue development of a tool that could produce 3D reconstructions of the particle positions from laser slice data. The tool was then used to analyse data from several drum experiments using bidisperse and tridisperse mixtures. In these experiments a drum was rotated a small amount between scans and the particle positions in each scan were used to analyse the progression of segregation. For the binary mixture of 6 and 9 mm particles rotated slowly, we could see an initial phase at constant segregation strength. After this phase segregation slowed down and the system reached equilibrium between segregation and diffusive remixing.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:02 science and culture in general, 30 exact sciences in general, 52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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