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Aseptic Zero Discharge Fluid Dynamic Gauging for Measuring the Thickness of Soft Layers on Surfaces
Author(s) -
Wang Shiyao,
Schlüter Florian,
Gottschalk Nathalie,
Scholl Stephan,
Wilson D. Ian,
Augustin Wolfgang
Publication year - 2016
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.201600014
Subject(s) - nozzle , materials science , discharge coefficient , wetting , mechanics , computational fluid dynamics , surface roughness , calibration , composite material , analytical chemistry (journal) , chromatography , chemistry , thermodynamics , statistics , physics , mathematics
A bench‐top device that can be used to perform fluid dynamic gauging measurements of soft solid layers with zero net liquid discharge and potentially under aseptic (closed system) conditions is demonstrated. Test results are presented for Newtonian liquids with a range of viscosities: deionized water, sucrose solutions, glycerol/water solutions and paraffin oil. The experimental data for discharge coefficient C d against clearance/nozzle throat diameter gave good agreement with CFD simulations and literature. The influence of surface roughness was studied by making measurements on a series of commercial sandpapers. The rough surfaces gave rise to systematic differences in C d from those obtained with smooth substrates. Careful calibration is required when gauging rough surfaces.