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Wetsus - Centre of Excellence for Sustainable Water Technology

2 ARTICLES PUBLISHED IN JoVE

Engineering

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Adam D. Wexler¹, Mónica López Sáenz², Oliver Schreer², Jakob Woisetschläger³, Elmar C. Fuchs¹

¹Applied Water Physics, Wetsus - Centre of Excellence for Sustainable Water Technology, ²IRCAM GmbH, ³Institute for Thermal Turbomachinery and Machine Dynamics, Graz University of Technology

Horizontal and vertical electrohydrodynamic liquid bridges are simple and powerful tools for exploring the interaction of high intensity electric fields and polar dielectric liquids. The construction of basic apparatus and operational examples, including thermographic images, for three liquids (e.g., water, DMSO, and glycerol) is presented.

Engineering

Preparation of Free-Surface Hyperbolic Water Vortices

Roman Klymenko^1,5, Harmen Nanninga², Esther de Kroon¹, Luewton L. F. Agostinho^1,2, Elmar C. Fuchs^1,3, Jakob Woisetschläger⁴, Wilfred F. L. M. Hoeben⁵

¹Wetsus - Centre of Excellence for Sustainable Water Technology, ²Water Technology Research Group, NHL Stenden University of Applied Sciences, ³Optical Sciences Group, Faculty of Science and Technology (TNW), University of Twente, ⁴Institute for Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, ⁵Department of Electrical Engineering, Electrical Energy Systems group, Eindhoven University of Technology

This paper describes how three different water vortex regimes in a hyperbolic Schauberger funnel can be created, their most important characteristics, and how associated parameters such as the oxygen transfer rates can be calculated.