WorldCat Identities

Kvamsdal, Trond

Overview
Works: 19 works in 23 publications in 1 language and 64 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Other, edc, Publishing director
Publication Timeline
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Most widely held works by Trond Kvamsdal
MARINE 2011 : IV International Conference on Computational Methods in Marine Engineering : selected papers by Luís Eça( )

5 editions published in 2013 in English and held by 42 WorldCat member libraries worldwide

This book contains selected papers from the Fourth International Conference on Computational Methods in Marine Engineering, held at Instituto Superior Técnico, Technical University of Lisbon, Portugal in September 2011. Nowadays, computational methods are an essential tool of engineering, which includes a major field of interest in marine applications, such as the maritime and offshore industries and engineering challenges related to the marine environment and renewable energies. The 2011 Conference included 8 invited plenary lectures and 86 presentations distributed through 10 thematic sessions that covered many of the most relevant topics of marine engineering today
Fluid-structure interaction( Book )

1 edition published in 2006 in English and held by 3 WorldCat member libraries worldwide

MARINE 2011, IV International Conference on Computational Methods in Marine Engineering Selected Papers by Luís Eça( )

1 edition published in 2013 in English and held by 3 WorldCat member libraries worldwide

IGA 2015 : III International Conference on Isogeometric Analysis : book of abstracts for the talks presented at the III International Conference on Isogeometric Analysis henl in Trondheim, Norway, 1-3 June 2015 by International Conference on Isogeometric Analysis( Book )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Effect of Turbulence Intensity on the Performance of an Offshore Vertical Axis Wind Turbine( )

in English and held by 1 WorldCat member library worldwide

Abstract: Offshore wind energy is one of the most competitive renewable energy resources available to us, which until now been under- exploited. Most of the problems associated with wind farm installation like land acquisition, low wind conditions and its visual impact can be eliminated to large extent by going offshore. In fact it is expected that by the year 2020, 40GW of offshore wind power capacity will be in operation. In an offshore context the wind turbine design methodologies have to address new challenges. For optimal performance the turbine needs to be huge in size and for horizontal axis wind turbines (HAWT) the diameter has already reached a size of 200m. Till now little attention has been paid to vertical axis offshore wind turbines. However, within the NOWITECH project new concepts for vertical axis turbine have been proposed and it might not take a long time before such turbines may become an realistic alternative for use offshore. The current work characterizes variable turbulence intensity flow field around a rotating vertical axis wind turbine (VAWT) in an offshore context. Complete three dimensional numerical transient simulations are performed accounting for the variation of multiple turbulence intensity levels associated with the oncoming wind. Usually offshore winds are highly turbulent in nature partially because of the rapid changes in wind directions along with the sea-air interaction. The results from the study indicate that due to the increase in the turbulence intensity level of 5% to 25% the performance of wind turbine decreases by almost 23% to 42% compared to no turbulence in the incoming wind field
Isogeometric Methods for CFD and FSI-Simulation of Flow around Turbine Blades( )

in English and held by 1 WorldCat member library worldwide

Abstract: Coupled fluid-structure interaction simulations of wind turbines have traditionally been considered computationally too expensive to carry out. However, more powerful computers and better solution techniques based on IsoGeometric Analysis (IGA) can make such simulations viable. Literature indicates that the smoothness of IGA approximations generally yield higher accuracy per- degree-of-freedom. We consider a two-dimensional test case prototypical of wake-vortex analyses and strip-theory approaches used in the numerical simulation of wind turbine
Editorial( )

in English and held by 1 WorldCat member library worldwide

Numerical benchmarking of fluid–structure interaction: An isogeometric finite element approach( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Abstract: In this paper we describe and evaluate an isogeometric finite element program, IFEM-FSI, for doing coupled fluid–structure interaction simulations. We investigate the role played by employing higher polynomial orders and higher regularity for solving a well known benchmark problem for flow past a circular cylinder with an attached flexible bar at Reynolds number Re =100. Furthermore, we investigate the sensitivity to resolution in the fluid mesh as well as stiffness distribution in the mesh movement algorithm. Mesh quality is also assessed. Our simulations indicate that quadratic and cubic spline elements give better estimation of lift, drag and displacements than linear spline elements. Abstract : Highlights: Describes an isogeometric finite element code for fluid–structure interaction. Simulates benchmark problem at Re =100 for cylinder with attached flexible bar. Investigates the use of linear, quadratic and cubic spline elements. Sensitivity to mesh resolution and mesh stiffness distribution is investigated. Quadratic and cubic spline elements estimate lift, drag and displacements well
Mesoscale Numerical Modelling of Met-ocean Interactions( )

in English and held by 1 WorldCat member library worldwide

Abstract: Offshore wind energy compared to its onshore counterpart appears more attractive due to its lesser visual impact and lesser issues related to land acquisition. Relatively more convenient accessibility to open sea allows for the installation of larger and larger turbines capable of producing much more power resulting in far lesser number of turbines per wind farm to produce the same amount of power. However, the large size of the turbines (≈ 200 m ) implies that they have to operate in conditions affected by phenomena characteristic of marine boundary layer. Complete inversion of wind profiles close to coasts, strong high waves and their interaction with the structures supporting the turbines can have a profound influence on the performance of wind turbines and their life time. A lot of development is taking place in the area of numerical and experimental modeling of wind turbines and its support structures but those studies are generally conducted for idealized cases. In reality the conditions can be markedly different. In order to understanding the behavior of turbines in operational condition, a good understanding of the marine boundary layer and ocean waves is an obvious prerequisite. In the current paper we explain the coupling of an atmospheric code HARMONIE using AROME physics with the ocean wave model WAM. Some preliminary results related to the effects of coupling on wind speed and significant wave height are presented for a few sites close to the Norwegian coast
13th Deep Sea Offshore Wind R&D Conference, EERA DeepWind'2016( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Impact of Urban Density and Building Height on Energy Use in Cities( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Abstract: Compact cities have been attributed to lower per capita energy use. However, the complexity of relationships between the elements that constitute energy consumption in the urban system is poorly understood. Little or no research exist on the relation between energy costs of building taller, and transportation and infrastructure energy benefits of building denser. This study provides a theoretical assessment of how energy use is related to urban density in a densely populated area, to aid the development of sustainable cities and land-use planning. The paper builds a holistic parametric model to estimate the total urban energy use for space heating, embodied building energy, transportation energy, and road infrastructure energy, and how these relate to urban density. It does so by varying building height and other urban characteristics related to density, with the aim of identifying the most influential parameters with regard to energy consumption. The possibility of an optimal building height and urban density is also investigated. A much denser and taller city structure than what is normal in cities today appears to be optimal for low urban energy use. The most influential urban density indicators are found to be the dwelling service level (m 2 /cap) and the building design lifetime. Transportation energy becomes increasingly important with a rise in population. Results indicate that depending on population and building lifetime there exists an optimal building height in the range of 7-27 stories. Climate is found to significantly influence the energy results. These preliminary findings are indicative of general trends, but further research and development of the model are needed to reduce uncertainties
Parallel CFD 2014 : parallel computational fluids dynamics : book of extended abstract of the 26th International Conference on Computational Fluids Dynamics held in Trondheim, Norway by International Conference on Computational Fluids Dynamics( Book )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Fluid structure interaction : applied numerical methods by Henri J.-P Morand( )

1 edition published in 2006 in English and held by 1 WorldCat member library worldwide

EERA DeepWind'2014, 11th Deep Sea Offshore Wind R & D Conference Trondheim, Norway, 22-24 January 2014 by European Energy Research Alliance( Book )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Investigation of the Impact of Wakes and Stratification on the Performance of an Onshore Wind Farm( )

in English and held by 1 WorldCat member library worldwide

Abstract: This work investigates the effects of wakes and stratification on the performance of turbines operating in the Bessaker wind farm. The wind farm is located in a highly complex terrain. Most dominant wind directions recorded close to the site are westerly and south easterly and the average wind speed is recorded in the range of 10–15 m/s implying that the turbines are rarely idle. However, the power production data of individual turbines revealed that a few turbines were almost always under-performing. This matter was earlier investigated using a multi-scale model ([1] ) involving meso-scale weather forecasting model providing input to a nested micro-scale CFD code. This previous study hinted at strong thermal stratification as the culprit which causes a channeling effect thus reducing the wind potential available uphill. However, wake effects were completely ignored in those studies. The current work includes an actuator line (AL) model to enable simulation of wake effects along with stratification and terrain effects on turbine behavior. As a result, the model is able to capture the delay in wake recovery during stable stratified conditions and the resultant turbine-turbine interactions leads to the reduced power production at wind-farm. The inclusion of wake effects showed that the current inter-turbine distance of 4 rotor turbine diameter at some locations is not good for wind-farm operation. This effect was not captured by the earlier multi-scale model which lacked the AL model. Further, the work shows some differences in results arising out of two models (current and previous multi-scale model) related to channeling effect. This difference is attributed to difference in thermal stratification level (Froude number) as the current model uses standard atmospheric inlet profiles/initial profiles, while the multi-scale model used inputs from the higher meso-scale weather forecasting model. The overall work indicates the importance of including wake and stratification effects and the importance of downscaling (using inputs from weather-forecasting models) in improving predictions. According to the authors this is the first work of its kind which accounts for stratification, complex terrain and wakes in a single simulation
Proceedings of the 16th Nordic seminar on computational mechanics in combination with the Pål G. Bergan anniversary seminar( )

1 edition published in 2003 in English and held by 1 WorldCat member library worldwide

14th Deep Sea Offshore Wind R&D Conference, EERA DeepWind'2017( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

12th Deep Sea Offshore Wind R&D Conference, EERA DeepWind'2015( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

 
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Audience level: 0.61 (from 0.47 for MARINE 201 ... to 0.99 for IGA 2015 : ...)

Languages
English (23)