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Background Orientated Schlieren Method Applied for Liquid Systems of Strong Refractive Gradients
Author(s) -
Meinecke Marvin,
Kilzer Andreas,
Weidner Eckhard
Publication year - 2020
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201900189
Subject(s) - schlieren , refractive index , materials science , simple (philosophy) , optics , schlieren imaging , atmospheric pressure , optoelectronics , physics , meteorology , philosophy , epistemology
A simple schlieren technique is used to visualize strong gradients of refractive index in liquids under atmospheric conditions and elevated pressure. The gradients are mainly caused by concentration differences within a thin liquid sheet. A simple system using Matlab and open source applications is designed and applied to demonstrate the challenges and limitations of a quantitative approach for strong gradients in liquids. Possibilities for the optimization regarding the detection of strong gradients are shown, but rather qualitative than quantitative results are obtained.