Münster University of Applied Sciences

About: Münster University of Applied Sciences is a education organization based out in Münster, Germany. It is known for research contribution in the topics: Luminescence & Laser. The organization has 694 authors who have published 1067 publications receiving 12597 citations.

Application of Hot-Wire Anemometry in the High Subsonic Organic Vapor Flow Regime

Abstract: Hot-wire anemometry (HWA) is a measurement technique which allows for the investigation of highly fluctuating flows. It has been widely used for turbulence studies including turbomachinery flow analysis, but relatively little is reported regarding its application in organic vapor flows. In this contribution, preliminary results are presented of an HWA study conducted in the test section of a closed-loop organic vapor wind tunnel using a constant-temperature-anemometry (CTA) system. The working fluid for this study was the perfluorinated ketone Novec™ 649, but air was also investigated for comparison reasons. Low subsonic up to high subsonic flows (i.e., up to M = 0.7) were considered, and the performance of HWA was assessed by obtaining turbulence intensities, velocity spectra, autocorrelation, and corresponding turbulent length scales. It was demonstrated that HWA is a useful tool for investigating turbulence phenomena in organic vapor flows although the dynamic loads and the wire Reynolds number levels are rather high.

Introduction: A Brief History of Engaged and Entrepreneurial Universities

Abstract: We present a brief history of universities and its transformation towards having an engaged and entrepreneurial profile as an introduction to this book. First, a recount from first over second to third generation universities sets the basis of the missions of universities. Second, an overview of research on engaged and entrepreneurial universities details the characteristics of the change. Lastly, a brief account of practitioner developments highlights the events occurring inside institutions. Ultimately, all chapter contribution of this edited book are presented as they contribute to writing the history of universities and their role in society.

Effect of hidden parameters for the plasma CVD synthesis of diamond films

Abstract: For the low-pressure synthesis of diamond films via plasma-jet chemical vapour deposition, process parameters such as the gas composition and pressure in the reaction chamber, as well as the temperature of the substrate and of the gas phase, have to be adjusted carefully owing to the correlations between them. In addition to these selected process parameters, some hidden parameters concerning the coating procedure and substrate surface must be taken into account. The influence of hidden parameters on the nucleation and growth of diamond on cemented carbide tools and tungsten-coated steel has been studied by energy-dispersive X-ray diffraction analysis and scanning electron microscopy. The unexpected effect of dry etching with atomic hydrogen by preheating the substrates with an Ar/H 2 plasma reduced the microroughness of the substrate surface and thereby deteriorated the nucleation and adhesion of a diamond film. Adapting the geometry of WC–Co tools by honing enhanced the cobalt content at the hard metal surface. This undesired effect — caused by mechanical machining — retarded the nucleation of diamond particles.