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De Jong, G. (author)The technology of FricDiff, an abbreviation of Frictional Diffusion, can be used to separate gases by adding a third gas, a so-called sweep gas, to the system. It is based on the diffusion difference of the feed molecules in the sweep gas. FricDiff is a proven principle and works at lab scale. The aim of the research is to study the technical...master thesis 2010
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Arkesteijn, R. (author)FricDiff is short for frictional differences and it describes a gas or vapour separating process which has the potential to reduce both energy requirements as well as capital investments. To develop a firm basis for future applications, the dynamics prediction and the control of the process were still missing from the research. Therefore the...master thesis 2010
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Appels, M.J. (author)In this paper a new friction model for the pre-sliding regime of dry friction is proposed. Current highly accurate friction models that incorporate analysis of the pre-sliding friction regime are all dynamic models. In these models the pre-sliding regime seems to be underdeveloped. The main focus of the models lies upon the analysis of the...master thesis 2010
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Horeman, T. (author), Jansen, F.W. (author), Dankelman, J. (author)Background - The risk of obtaining a postsurgical infection depends highly on the air quality surrounding the exposed tissue, surgical instruments, and materials. Many isolators for open surgery have been invented to create a contained sterile volume around the exposed tissue. With the use of an isolator, a surgical procedure can be performed...journal article 2010
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Godjevac, M. (author)The author is a naval architect and this book is his PhD thesis. In this research the author focuses on friction in a controllable pitch propeller (CPP), formation of wear in a CPP system, and their mutual dependence. Instead of going deeply only in tribology aspects, the author tries to get an overall description of the problem incorporating...doctoral thesis 2010
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Lemmen, H.J.K. (author)Friction stir welding is a young welding process with high potential to replace riveted joints in aerospace structures like the fuselage. Friction stir welding is a robust process and capable of welding high strength aluminum alloys. Therefore it can lead to both costs and weight savings. To substitute riveted joints by friction stir welded...doctoral thesis 2010
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Arias-Cuevas, O. (author), Li, Z. (author), Lewis, R. (author)The adhesion (or available friction) in the wheel–rail contact is the most important parameter for the braking and traction operation of rail vehicles. Since the beginning of railway transportation, sanding from the locomotive has been a common practice to enhance the wheel–rail adhesion. In recent years, sanding from electrical multiple units ...journal article 2009
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Buykx, S.M. (author), Delfgaauw, S. (author), Bosch, J.W. (author)The excavation of deep building pits often requires a check against failure by uplift of low permeability ground layers below excavation level. Whenever the weight of these soil layers is less than the pore-water pressure underneath, measures to resist buoyancy are to be considered. The measures most commonly adopted include: decreasing the...conference paper 2009
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Wang, L. (author), Cai, J. (author), Zhou, J. (author), Duszczyk, J. (author)Appropriate specification of the frictional boundary condition for the finite-element (FE) simulation of metal-forming processes is of great importance to the trustworthiness of the results. The research reported in this communication aimed at understanding the interfacial contact between aluminium and steel at elevated temperatures and...journal article 2009
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Grosse, S. (author), Schröder, W. (author)Wall-shear stress results from the relative motion of a fluid over a body surface as a consequence of the no-slip condition of the fluid in the vicinity of the wall. To determine the two-dimensional wall-shear stress distribution is of utter importance in theoretical and applied turbulence research. In this article, characteristics of the Micro...journal article 2009
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Li, Z. (author), Arias-Cuevas, O. (author), Lewis, R. (author), Gallardo-Hernández, E.A. (author)Leaf-related adhesion problems have been present in many railway networks all over the world in the last few decades. Since the early 1970s many measures have been undertaken in order to mitigate the problem. One of the measures adopted by many railway networks is the use of friction modifiers. However, the low adhesion problem still persists....journal article 2008
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Gillissen, J.J.J. (author)Polymer-induced drag reduction is the phenomenon by which the friction factor of a turbulent flow is reduced by the addition of small amounts of high-molecular-weight linear polymers, which conformation in solution at rest can vary between randomly coiled and rodlike. It is well known that drag reduction is positively correlated to viscous...journal article 2008
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Dodou, D. (author), Van den Berg, M. (author), Van Gennip, J. (author), Breedveld, P. (author), Wieringa, P.A. (author)A self-propelling colonoscopic device moving inside the colonic tube should be able to periodically grip safely to the colonic wall as well as to manipulate the generated friction. The feasibility of achieving high grip and friction manipulation by covering the device with mucoadhesive films is experimentally tested. More precisely, the...journal article 2008
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Verhoef, J. (author)Colonic cancer is the second leading cause of death among cancers in the Western world. Early detection greatly improves the chances of survival. Colonoscopy is a non-invasive detection method through natural access, making it possible to look inside the colon, take biopsies and remove small polyps that can develop into cancer. Colonoscopy is...master thesis 2007
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- Van Den Dobbelsteen, J.J. (author), Schooleman, A. (author), Dankelman, J. (author) journal article 2007
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- Kamminga, J.D. (author), Janssen, G.C.A.M. (author) journal article 2007
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Dodou, D. (author)The most effective screening method for colonic cancer is colonoscopy. However, colonoscopy cannot be easily embraced by the population because of the related pain intensity. Robotic devices that pull themselves forward through the colon are a possible alternative. The main challenge for such devices is their locomotion method along the slippery...doctoral thesis 2006
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Abbas, A. (author), Dias, J. (author)With the increase in fuel prices, flow control technologies are becoming of greater interest as being the means of achieving a technology quantum leap in the next generation of aircrafts, providing the means to achieve significant reduction in drag (fuel burn) and improvements in aircraft performance, shortening thus the path to accomplish the...conference paper 2006
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Hoffman, J. (author)In this paper we use a General Galerkin (G2) method to simulate drag crisis for a sphere, where the unresolved turbulent boundary layer is modeled as a decreasing skin friction.conference paper 2006
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Dodou, D. (author), Breedveld, P. (author), Wieringa, P.A. (author)One of the main challenges in designing diagnostic devices able to move along the colon is their locomotion method. Generating friction without applying high normal forces is a key requirement in order to eliminate the risk of tissue damage. One possible solution is to generate friction by means of adhesive forces. For this reason, the device...journal article 2006