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This work aims to investigate the effect of liquid entrainment on liquid film dryout in annular flow for flow boiling. Entrainment and deposition rates of droplets were included in mass conservation equations to estimate the local liquid film mass flux in annular flow, and the critical vapor quality at dryout conditions. Different entrainment rate correlations were evaluated using flow boiling dat
In ESS, a pulsed proton beam of 5 MW mean power will hit a tungsten target to generate neutrons by spallation. The pulses are 2.86 ms long and occur with 14 Hz; the power within a pulse is 125 MW. Only centimeters from the target, the neutrons are moderated by liquid hydrogen in aluminium vessels. The deposited power heats the surrounding structures and fluids which are circulated and cooled. The
In the paper we discuss the following research questions: How do start-ups provide themselves with software and what are the motivations behind deciding on a specific sourcing option? The questions are motivated from the fact that acquirement of software is a challenging question, and it is especially interesting to explore how start-ups do, since they do not have a legacy to deal with. The resear
The effect of ozone (O3) in a turbulent, swirl-stabilized natural gas/air flame was experimentally investigated at atmospheric pressure conditions using planar laser-induced fluorescence imaging of formaldehyde (CH2O PLIF) and dynamic pressure monitoring. The experiment was performed using a dry low emission (DLE) gas turbine burner used in both SGT-700 and SGT-800 industrial gas turbines from Sie
Enterprise Resource Planning (ERPs) systems are increasingly playing a central role in many organizations. However, before implementing ERPs organizations create business cases that are used when deciding on an ERP investment. The research questions are: How do organizations evaluate ERP investments and what models do they use to follow up the business case of an ERP investment? To say something a
During the last decade Trump International Golf Links Scotland (TIGLS) has built on land where no development was previously outlined and, appropriating parts of a Site of Special Scientific Interest, has come to occupy an important place in debates on Scottish planning policy. Though plans were initially rejected in 2007 by the Aberdeenshire planning body responsible, the Scottish Government subs
We extend a thermodynamically consistent finite strain micro-sphere framework elaborated by Carol et al. towards the modelling of phase-transformations to allow for the simulation of polycrystalline solids such as, e.g., shape memory alloys and shape memory polymers undergoing large deformations. The considered phase-transformation mechanism is based on statistical physics and allows the considera
In this paper we demonstrate how so-called polynomial chaos expansions can be used to create efficient algorithms for uncertainty quantification in some classes of problems related to wave propagation in stochastic environment. We provide an example from telecommunication.
This chapter provides the conceptual and contextual backdrop for the case studies in this volume. The chapter discusses some of the challenges that the world is currently confronting in addition to environmental degradation and climate change: rising income and wealth concentration, with social exclusion and the marginalization of many segments of the population. This is a trend in developed and d
Accurate assessment of people’s preferences for different outdoor lighting applications is increasingly considered important in the development of new urban environments. Here a new method of random environmental walking is proposed to complement current methods of assessing urban lighting applications, such as self-report questionnaires. The procedure involves participants repeatedly walking betw
Experiments were performed at atmospheric pressure conditions on the prototype 4th generation DLE burner. The combustion changes that occur for alteration of the operating conditions by changing the equivalence ratios (φ) for CH4 as fuel at different sections of the burner, were optically investigated. The burner assembly has three concentrically arranged premixed burner sections: an outer Main se
Objective. To evaluate the performance of ultrasound in pediatric appendicitis and the integration of US with the pediatric appendicitis score (PAS) and C-reactive protein (CRP). Method. An institution-based, retrospective study of children who underwent abdominal US for suspected appendicitis between 2012 and 2015 at a tertiary pediatric surgery center. US results were dichotomized, with a nonvis
