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Reproducibility of Falling Body Viscometry

29,50 €*

Sofort verfügbar, Lieferzeit: 1-3 Tage

Produktnummer: 18b2cba553c4a346ba9b26d143efeb3b5d
Autor: Rückert, Marcel
Themengebiete: Adjoint Solving Falling Body Viscometry Flow Optimisation Laminar Flow Viscometry Viscosity
Veröffentlichungsdatum: 29.06.2023
EAN: 9783844090772
Auflage: 1
Sprache: Englisch
Seitenzahl: 150
Produktart: Kartoniert / Broschiert
Verlag: Shaker
Produktinformationen "Reproducibility of Falling Body Viscometry"
In this work, the reproducibility of falling body viscometry is investigated. For this purpose, a new continuous measuring method for pressure ranges up to 8,000 bar is developed, which is able to identify stationary falling conditions. In an analysis all influences acting on the falling body are investigated and promising falling body shapes are identified. With the aid of a numerical flow simulation and coupled adjoint optimisation, a falling body is developed for increased Stokes flow performance. By using a ferritic, corrosion-resistant steel, an inductive velocity detection over the complete measuring length as well as an active lifting of the falling body is made possible. The newly developed method is suitable for the automated viscosity measurement of high- as well as low-viscosity fluids and thus covers the range from bio-fuels to hydraulic oil. Due to the innovative measuring principle, the velocity of the falling body can be continuously recorded and thus stationary conditions can be identified. By means of analytical and numerical methods, it can be shown that a falling body tends towards large eccentricities during the fall in a tube, which significantly increases its fall velocity. Furthermore, a variation of the falling body geometry shows that the falling body shape has a significant influence on the reproducibility of the measurements. The adjoint optimised body provides very good reproducibility and is suitable for the use with low-viscosity fluids. For high viscosity fluids it can be shown that fins on the lateral surface of the falling body have a small influence on the flow and a concentric fall can be realised.

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