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NHL Stenden University of Applied Sciences

2 ARTICLES PUBLISHED IN JoVE

Chemistry

Stereolithographic 3D Printing with Renewable Acrylates

Vincent S.D. Voet¹, Geraldine H.M. Schnelting¹, Jin Xu², Katja Loos², Rudy Folkersma¹, Jan Jager¹

¹Professorship Sustainable Polymers, NHL Stenden University of Applied Sciences, ²Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen

A protocol for additive manufacturing with renewable photopolymer resins on a stereolithography apparatus 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.