Faculty of Science and Technology: Recent submissions
Now showing items 1561-1580 of 7367
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Predicting parton energy loss in small collision systems
(Peer reviewed; Journal article, 2021)Medium induced parton energy loss is not conclusively established either in very peripheral heavy-ion collisions or in proton-ion collisions. However, the standard interpretation of azimuthal momentum anisotropies in these ... -
Use of a transient model for studying kick migration velocities and build-up pressures in a closed well
(Chapter, 2021)The objective of the paper is to show that using pressure build-up curves for estimating kick migration velocities can be unreliable. This will be demonstrated by using a transient flow model where different flow patterns ... -
An evaluation of key challenges of CO2 transportation with a novel Subsea Shuttle Tanker
(Peer reviewed; Journal article, 2021)Recently, a novel Subsea Shuttle Tanker (SST) concept has been proposed to transport carbon dioxide (CO2) from ports to offshore oil and gas fields for either permanent storage or enhanced oil recovery (EOR). SST is a large ... -
A practical design procedure for initial sizing of heaving point absorber wave energy converters
(Peer reviewed; Journal article, 2021)Designing a wave energy converter with the proper size has always been challenging since it is a trade-off between many factors including cost, practicality, and energy output. In this paper a practical design procedure ... -
Bending capacity of multi-layered FRP pipelines during offshore installation
(Peer reviewed; Journal article, 2021)The Fiber Reinforced Polymeric (FRP) pipelines have higher strength than steel, and excellent fatigue behavior and corrosion resistance. Because of their superior performance in mechanical loads and corrosive environment, ... -
A compensation scheme applied on wind turbine blade pitch control for the reduction of non-torque main shaft loads
(Peer reviewed; Journal article, 2021)It has been well established that non-torque main shaft loads influence the internal drive train loads. This paper proposes a scheme that compensates for non-torque loads in the blade pitch controller. The compensation ... -
Experimental investigation of crack width variation along the concrete cover depth in reinforced concrete specimens with ribbed bars and smooth bars
(Peer reviewed; Journal article, 2021)Crack width variation along the concrete cover depth has been studied from the past for better understanding of the cracking phenomenon in reinforced concrete (RC) structures. Previous studies have highlighted important ... -
Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations
(Peer reviewed; Journal article, 2021)Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. ... -
Computational fluid dynamics simulation of buoyant mixing of miscible fluids in a tilted tube
(Peer reviewed; Journal article, 2021)Buoyancy-driven flows and mixing of fluids with different densities occur frequently both in nature and as part of industrial processes within chemical and petroleum engineering. This work investigates the buoyant exchange ... -
Dual lidar wind measurements along an upstream horizontal line perpendicular to a suspension bridge
(Peer reviewed; Journal article, 2021)Remote wind sensing can complement traditional anemometry at a bridge site and contribute to an improved wind-resistant design of long-span bridges. This study examines wind lidar measurement data recorded along a ... -
Cuttings transport with oil- and water-based drilling fluids
(Chapter, 2021)Deviated well sections are common in modern well construction. In mature areas like the North Sea region, practically all producers or injector wells will have highly deviated sections. These wells must be drilled and ... -
Formal Verification of HotStuff
(Chapter, 2021)HotStuff is a recent algorithm for repeated distributed consensus used in permissioned blockchains. We present a simplified version of the HotStuff algorithm and verify its safety using both Ivy and the TLA Proof Systems ... -
Simulation of Counter-Current Spontaneous Imbibition Based on Momentum Equations with Viscous Coupling, Brinkman Terms and Compressible Fluids
(Peer reviewed; Journal article, 2021)A numerical model is investigated representing counter-current spontaneous imbibition of water to displace oil or gas from a core plug. The model is based on mass and momentum conservation equations in the framework of the ... -
New G2-conifolds in M-theory and their field theory interpretation
(Peer reviewed; Journal article, 2021)A recent theorem of Foscolo-Haskins-Nordström [1] which constructs complete G2-holonomy orbifolds from circle bundles over Calabi-Yau cones can be utilised to construct and investigate a large class of generalisations of ... -
Explainable artificial intelligence for human-machine interaction in brain tumor localization
(Peer reviewed; Journal article, 2021)Primary malignancies in adult brains are globally fatal. Computer vision, especially recent developments in artificial intelligence (AI), have created opportunities to automatically characterize and diagnose tumor lesions ... -
Cement properties characterization from a section retrieved from an oil production well after 33 years of downhole exposure
(Peer reviewed; Journal article, 2021)A unique data set has been constructed based on the study of class G cement recovered from an oil well on the Norwegian continental shelf. The cement was placed between two casing sections and submitted to downhole conditions ... -
Saving Nine Without Stitching in Time: Integrity Check After-the-fact
(Chapter, 2021)Electrical substations transform voltage from high to low, or low to high for distribution and transmission, respectively, and are a critical part of our electricity infrastructure. The state of a substation is continuously ... -
Oil-based drilling fluid's cuttings bed removal properties for deviated wellbores
(Peer reviewed; Journal article, 2021)Results from cuttings transport tests in the laboratory using different field-applied oil-based drilling fluids with similar weight and varying viscosities are presented in this paper. The fluids are designed for highly ... -
LMI-based design of state-feedback controllers for pole clustering of LPV systems in a union of DR-regions
(Peer reviewed; Journal article, 2021)This paper introduces an approach for the design of a state-feedback controller that achieves pole clustering in a union of DR-regions for linear parameter varying systems. The design conditions, obtained using a partial ... -
The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective
(Peer reviewed; Journal article, 2021)Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to ...