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Laven, J. (author)The HIDiC is a concept of distillation to increase the energy efficiency. The HIDiC combines the advantages of the heat pump assisted column with the diabatic column. The rectification section and stripping section are separated and the rectification section is placed inside the stripping section. By compressing the flow from the stripping...master thesis 2010
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Verdoold, J. (author)This dissertation focuses on turbulent thermal convection, which occurs in a wide range of (geo)physical situations, like in the atmosphere, the oceans, the interior of stars or planets, and engineering applications, like metal casting or crystal growth processes. In this work, a special type of thermal convection, Rayleigh-Bénard convection, is...doctoral thesis 2010
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Saeid, S. (author), Barends, F.B.J. (author)One of the crucial topics in this century is sustainable energy. Since the sources of fossil fuels are limited and are going to be exhausted, there is a need to look for sustainable renewable energy. In this respect, the exploitation of geothermal energy from deep hot aquifers becomes opportune. Hence, insight is required in the heat balance of...conference paper 2009
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Rops, C.M. (author)New production techniques, which became available since the 1980’s, allowed the mass production of small sized fluidic systems. Reducing the size of a technical system alters the performance due to scaling effects. Physical phenomena which operate on volumes, such as gravity and inertia, become less important with respect to physical phenomena...doctoral thesis 2009
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Alderliesten, M. (author)Mean particle diameters are important for the science of particulate systems. This thesis deals with a definition system for these mean diameters, called Moment-Ratio (M-R) definition system, and provides a general statistical and physical basis. Also, the current DIN/ISO definition system is discussed. Many types of mean diameters defined...doctoral thesis 2008
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Johannessen, E. (author), Gross, J. (author), Bedeaux, D. (author)A vapor-liquid interface introduces resistivities for mass and heat transfer. These resistivities have recently been determined from molecular simulations, as well as theoretically using the van der Waals square gradient model. This model, however, does not allow for direct quantitative comparison to experiment or results from molecular...journal article 2008
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- Andrés de la Fuente, J.I. (author) doctoral thesis 2007
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Lau, G.K. (author), Goosen, J.F.L. (author), Van Keulen, F. (author), Chu Duc, T. (author), Sarro, P.M. (author)A powerful and effective design of a polymeric thermal microactuator is presented. The design has SU-8 epoxy layers filled and bonded in a meandering silicon (Si) microstructure. The silicon microstructure reinforces the SU-8 layers by lateral restraint. It also improves the transverse thermal expansion coefficient and heat transfer for the...journal article 2007
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Yao, J. (author), Patel, M.K. (author), Yao, Y. (author), Mason, P.J. (author)Numerical simulation has been conducted for the investigation of heat transfer in a rectangular, highaspect ratio microchannel with heat sinks, similar to an experimental study. Water at ambient temperature is used as working fluid and the heating power of 180 W is introduced via electronic cartridges in the solids. Three channel heights of 0.3...conference paper 2006
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Tang, J.H. (author), Jiang, B. (author)A numerical calculation procedure based on the least-squares finite element method (LSFEM) is employed to study the fluid flow and heat transfer in a 3-D heat exchangers with in-lined and staggered multiple-row (4 rows) tubes. In this study, the fin pitch of the heat exchanger is 8 fins per inch and the fluid flow is assumed steady,...conference paper 2006
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Rohde, M. (author)Laser surface melting and alloying are important techniques to improve the properties of a material locally without affecting the bulk. In ceramic components these methods can be used to optimise the fracture toughness, friction and wear but also the thermal and electrical conductivity [1]. In order to predict the results of the modification...conference paper 2006
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Nerinckx, K. (author), Vierendeels, J. (author), Dick, E. (author)A Mach-uniform algorithm is an algorithm with a good convergence rate for any level of the Mach number. In this paper, the severe time step restriction for low speed flows is removed by treating the acoustic and diffusive terms implicitly. After identification of these terms in the conservative set, we end up with a semi-implicit system. The way...conference paper 2006
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Geers, L.F.G. (author), Tummers, M.J. (author), Hanjali?, K. (author)To gain a better insight into the effects of eddy structure and their thermal imprint on the impinging surface, we applied several methods to identify coherent structures in two arrangements of multiple jets. High-resolution particle imaging velocimetry measurements of the instantaneous fluid velocity have been performed to provide data for...journal article 2005
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Meewisse, J.W. (author)Ice slurries are liquid solutions of a freezing point depressant in water, in which small ice crystals are present. Ice slurries are efficient secondary cooling fluids because they utilize the latent heat effect involved with the ice/water phase change. A high heat capacity is available at relatively constant temperatures, while ice slurries are...doctoral thesis 2004
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Geers, L.F.G. (author)Because of their high efficiency and their ability to provide high heat transfer rates, impinging jets are applied for rapid cooling and heating in a wide variety of industrial processes. However, the physical phenomena controlling the heat transfer from impinging jets are to a large degree unknown. The goal of the present project was to gain a...doctoral thesis 2004
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- Hanjalic, K. (author), Peeters, T.W.J. (author) book 1997
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ten Dam, A.A. (author), van den Berg, J.I. (author)The mathematical modelling and numerical simulation of a condenser is discussed. This mathematical model is part of the NLR approach to model and scale two-phase heat transport systems (for space). During a previous study the condensation length required for various gravity conditions, and working fluids has been investigated by means of...report 1993
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Delil, A.A.M. (author), Heemskerk, J.F. (author)Two mechanically pumped two-phase test rigs were built at NLR in order to experimentally study critical issues of spacecraft two-phase thermal management systems: - a 5 kW, 31 mm ID, freon loop, focusing on the critical components of the ESA Two-Phase Heat Transport System. - a 30000 W, 4.93 mm ID, ammonia loop, to support the development of the...report 1990
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Delil, A.A.M. (author), Heemskerk, J.F. (author)The monitoring of the quality of the two-phase mixture at various locations in the system is a valuable, possibly indispensable, part of the control system needed to properly operate a two-phase heat transport system for large spacecraft. Based on a trade-off of various quality monitoring concepts, NLR started to develop a dedicated quality...report 1988
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van den Assem, D. (author), Bunk, P.B. (author)Preliminary experiments have been performed with a laboratory model of an electro-osmotic heat pipe filled with ethanol. With dismounted electro-osmotic pump, the heat transport through the pipe and the temperature distribution along the pipe wall have been measured. The measurements have been performed as a function of the temperature...report 1983