In-Situ Observation of Pouring a High-Viscosity Liquid

Abstract

The rheology of liquids affects their ease of pouring. In this study, the subjects evaluated the feeling of pouring liquids with various viscosities. The situation was recorded with a high-speed camera and force plate. The score for ease of pouring water and 5 wt% thickened aqueous solution was 8.9 ± 1.5 and 2.1 ± 1.6 respectively, demonstrating that the score decreased with increasing viscosity. The three stages of the pouring process, namely the flowing state in which the liquid flows out vigorously (I), the yarning state in which the liquid flows out to stretch (II), and the dripping state in which the liquid flows out as droplets (III) were observed. The duration of state II extended as the viscosity increased. These findings can be useful for the development of characteristic containers and beverages.

Go with the flow: deep learning methods for autonomous viscosity estimations

“…Viscosity is a measure of a fluid's resistance to flow caused by internal friction of fluid layers during motion. It is a fundamental property that is important in a wide range of applications such as lubricants, oil recovery, 7 3D printing technologies, inks and coatings, 8 and in chemical formulations for sectors such as pharmaceuticals, 9 agrochemicals, food, 10 and home and personal care. Viscosity is also an important parameter in material discovery labs; for example, the viscosity of a liquid can provide information about the current state in a chemical synthesis workflow.…”