Faculty of Science and Technology: Nye registreringer
Viser treff 1801-1820 av 7367
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Influence of 3D Printing FDM Process Parameters on Tensile Property of ULTEM 9085
(Peer reviewed; Journal article, 2019)3D printing is a promising digital manufacturing technique that produces parts, layer by layer. Fused deposition modeling (FDM) is a widely employed 3D printing technology that produces components by heating, extruding and ... -
Investigation of transitional turbulence models for CFD simulation of the drag crisis for flow over a sphere
(Peer reviewed; Journal article, 2019)The drag crisis is an interesting physical phenomenon for flow over bluff bodies, where the drag coefficient suddenly drops as the Reynolds number increases. This behavior is caused by the flow transitioning from laminar ... -
Field development optimization of waterflooding process using data assimilation methods
(Peer reviewed; Journal article, 2019)The application of data assimilation methods for field development optimization has been the subject of intense investigation during the past 10 years. Lately has seen remarkable progress in the ability of data assimilation ... -
Flavor structure of GUTs and uncertainties in proton lifetime estimates
(Peer reviewed; Journal article, 2019)We study the flavor aspects of proton lifetime estimates in simple grand-unified models, paying particular attention to their inherent fragility due to the notorious lack of control of some of the key parameters governing ... -
Mineralogical alterations in calcite powder flooded with MgCl2 to study Enhanced Oil Recovery (EOR) mechanisms at pore scale
(Peer reviewed; Journal article, 2019)Seawater injection into chalk-reservoirs on the Norwegian Continental Shelf has increased the oil recovery and reduced seabed subsidence, but not eliminated it. Therefore, understanding rock–fluid interactions is paramount ... -
Topology optimization through stiffness/weight ratio analysis for a three-point bending test of additive manufactured parts
(Peer reviewed; Journal article, 2019)Topology Optimization (TO) is a technique that allows for increasingly efficient designs and its objective is to maximize the performance of mechanical systems or structure in a variety of fields. Attempts to employ TO for ... -
Spin injection from EuS/Co multilayers into GaAs detected by polarized electroluminescence
(Peer reviewed; Journal article, 2019)We report on the successful spin injection from EuS/Co multilayers into (100) GaAs at low temperatures. The spin injection was verified by means of polarized electroluminescence (EL) emitted from AlGaAs/GaAs-based ... -
Effect of Pressing Parameters on the Quality of Joint Formation of Heat Exchanger Fins with the Base Plate
(Peer reviewed; Journal article, 2019)In this paper, the results of experimental and numerical studies on joining the thin fins to the thick base plate of a heat exchanger are presented. The elements of the heat exchanger were joined by using developed method ... -
CFD Simulations of the Propagation of Free-Surface Waves Past Two Side-By-Side Fixed Squares with a Narrow Gap
(Peer reviewed; Journal article, 2019)Two-dimensional computational fluid dynamics (CFD) simulations are carried out to investigate the gap resonance phenomenon that occurs when free-surface waves travel past twin squares in tandem. The volume of fluid method ... -
A GIT construction of degenerations of Hilbert schemes of points
(Peer reviewed; Journal article, 2019)We present a Geometric Invariant Theory (GIT) construction which allows us to construct good projective degenerations of Hilbert schemes of points for simple degenerations. A comparison with the construction of Li and Wu ... -
FEM-based assessment of wear of stamping die
(Peer reviewed; Journal article, 2019)In sheet metal forming industry, surface damage and wear such as adhesion and ploughing of metallic sheet, is a well-known problem which reduces the tool life and quality of drawn elements. Surface defects are the consequences ... -
A Three-Dimensional Elastic-Plastic Contact Analysis of Vickers Indenter on a Deep Drawing Quality Steel Sheet
(Peer reviewed; Journal article, 2019)Three-dimensional finite element-based numerical analysis of Vickers indenter hardness test was conducted to investigate the effect of frictional conditions and material anisotropy on indentation results of deep drawing ... -
CFD simulations of violent breaking wave impacts on a vertical wall using a two-phase compressible solver
(Peer reviewed; Journal article, 2019)Four different types of breaking wave impacts on a vertical wall are simulated using a two-dimensional two-phase Computational Fluid Dynamic (CFD) model. Air is considered as an isentropic ideal gas without solving an ... -
Trends of using polymer composite materials in additive manufacturing
(Peer reviewed; Journal article, 2019)Additive manufacturing (AM) technology is nowadays one of the advanced manufacturing technologies used to convert three dimensional product data to physical objects without any special tooling. The emergence of the technology ... -
Buckling capacity of simulated patch corroded tubular columns – laboratory tests
(Peer reviewed; Journal article, 2019)This paper presents the experimental test results for the buckling capacity of tubular columns exposed to simulated unsymmetrical patch corrosion damage. These tests were performed to investigate how the results of these ... -
Mechanical performance of concrete made of steel fibers from tire waste
(Peer reviewed; Journal article, 2019)Currently, the disposal of used tires is a worldwide challenge, due to their non-degradability. Therefore, recycling has become a potential solution for managing such waste. During recycling, materials such as rubber and ... -
Numerical analysis of the influence of friction conditions on the pile-up effect in Vickers hardness measurements
(Peer reviewed; Journal article, 2019)Vickers indentation load-depth curve may be used to determine basic mechanical properties of metallic materials such as hardness, yield stress, modulus of elasticity, and elastic and plastic work. The pile-up phenomenon ... -
Prediction of springback in the air V-bending of metallic sheets
(Peer reviewed; Journal article, 2019)Springback is a critical phenomenon in design and analysis of sheet metal forming process of metallic sheets. An accurate prediction of elastic recovery of material allows to design forming tools which take into account ... -
Finite element method-based modeling of bending under tension friction test of deep drawing quality steel sheets
(Peer reviewed; Journal article, 2019)Understanding of the effect of the friction on the sheet deformation is a key factor in design and realization of stamping process. Among others, bending under tension friction test simulates the frictional phenomena on ... -
Harmfulness mapping for the Pechora Sea
(Peer reviewed; Journal article, 2019)Pechora Sea is characterized with many species including birds, fishes, benthic fauna and marine mammals. The food chains in the Pechora Sea ecosystems are simple and vulnerable to contamination even in a small concentration ...