Browsing Publikasjoner fra CRIStin by Title
Now showing items 2681-2700 of 4313
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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 ... -
Numerical analysis on flow around a wall-mounted square structure using Dynamic Mode Decomposition
(Peer reviewed; Journal article, 2021-03)Numerical investigations of the flow around a wall-mounted square structure have been carried out by using three-dimensional Spalart-Allmaras Delayed Detached Eddy Simulations (SADDES). The Reynolds number based on the ... -
Numerical and analytical studies of ship deckhouse impact with steel and RC bridge girders
(Peer reviewed; Journal article, 2021)Bridges crossing navigable waterways are under the threat of accidental collisions from passing ships. However, previous research focus was mainly placed on ship collision with bridge substructures while ship-bridge ... -
Numerical investigation of breaking wave loads on the downstream inclined cylinder under shelter effect from the upstream vertical cylinder
(Peer reviewed; Journal article, 2021)Breaking waves interaction with two tandem cylinders are numerically studied using Computational Fluid Dynamic (CFD) software OpenFOAM. The effects of transverse inclined angles of the downstream cylinder and separation ... -
Numerical Investigation of Flow around Two Tandem Cylinders in the Upper Transition Reynolds Number Regime Using Modal Analysis
(Peer reviewed; Journal article, 2022)Flow around two tandem cylinders at Re = 3.6 × 106 for different center-to-center spacing ratio (L/D) is investigated numerically using two-dimensional (2D) Unsteady Reynolds-Averaged Navier–Stokes (URANS) equations combined ... -
Numerical Investigation of Non-Darcy Flow Regime Transitions in Shale Gas Production
(Peer reviewed; Journal article, 2020-07)Shale gas reservoirs are organic rich formations with often ultra-low permeability. Gas is stored in free and adsorbed form. Conventional Darcy flow cannot fully describe the gas transport in such porous media. It is thus ... -
Numerical investigation of scour beneath pipelines subjected to an oscillatory flow condition
(Peer reviewed; Journal article, 2021-10)The present study carries out two-dimensional numerical simulations to investigate scour beneath a single pipeline and piggyback pipelines subjected to an oscillatory flow condition at a Keulegan–Carpenter (KC) number of ... -
Numerical investigation of the impacts of borehole breakouts on breakdown pressure
(Peer reviewed; Journal article, 2019)Borehole breakouts appear in drilling and production operations when rock subjected to in situ stress experiences shear failure. However, if a borehole breakout occurs, the boundary of the borehole is no longer circular ... -
Numerical Investigation of Vortex-Induced Vibrations of a Flexible Riser with Staggered Buoyancy Elements
(Peer reviewed; Journal article, 2020-01)This paper presents a numerical algorithm used together with a Finite-Element based Vortex-Induced Vibration (VIV) prediction software VIVANA to obtain a hydrodynamic force coefficient database based on response measurements ... -
Numerical investigation of wave-plus-current induced scour beneath two submarine pipelines in tandem
(Peer reviewed; Journal article, 2019-12)Two-dimensional (2D) local scour beneath two submarine pipelines in tandem under wave-plus-current conditions is investigated numerically. A fully-coupled hydrodynamic and morphologic model based on unsteady Reynolds-averaged ... -
Numerical Investigation on Aerodynamic Characteristics of Dual-Rotor Wind Turbines
(Peer reviewed; Journal article, 2022)Improving power output and reducing costs are crucial to the sustainable development of offshore wind power. In the present study, a dual-rotor wind turbine (DRWT) is proposed to improve wind energy capture efficiency by ... -
Numerical investigation on blast-induced rock fragmentation with different stemming structures
(Peer reviewed; Journal article, 2023-09)Stemming is one of the main concerns in blast of rock engineering due to its impact on explosion energy consumption and rock excavation performance. In this study, blast-induced rock fragmentation under different stemming ... -
Numerical investigation on rock fragmentation under decoupled charge blasting
(Peer reviewed; Journal article, 2023-05)Blasting using decoupled charge is extensively applied in rock excavation and rock fragmentation. In this study, the rock fragmentation induced by blasting using decoupled charge is investigated by combined finite element ... -
Numerical investigations of flow around subsea covers at high Reynolds numbers
(Peer reviewed; Journal article, 2021)Two-dimensional (2D) numerical simulations of flow over wall-mounted rectangular and trapezoidal ribs subjected to a turbulent boundary layer flow with the normalized boundary layer thickness of δ/D = 0.73,1.96,2.52 (D is ... -
Numerical investigations of pipe flow downstream a flow conditioner with bundle of tubes
(Peer reviewed; Journal article, 2023-01)Flow conditioners are widely utilized in pipeline systems to improve the precision of flow rate measurement in the pipeline systems of the offshore and subsea oil and gas industry. There is a lack of knowledge about the ... -
Numerical Modelling and Sensitivity Analysis of Gas Kick Migration and Unloading of Riser
(Chapter, 2019)In deepwater wells there is a risk of gas entering the riser. This can be caused by gas being trapped by the BOP after a well kill operation, or it can be that the BOP was not closed quickly enough upon kick detection. ... -
Numerical modelling of a high temperature borehole thermal energy storage system: Norway case study
(Peer reviewed; Journal article, 2023)Global warming is threatening life on earth. Utilising renewable energy is considered as the most effective measure to minimise anthropogenic CO2 emissions. High-temperature borehole thermal energy storage (BTES) systems ... -
Numerical modelling of hydrodynamic responses of Ocean Farm 1 in waves and current and validation against model test measurements
(Peer reviewed; Journal article, 2021)With the continuous growing of the aquaculture industry and increasingly limited fish farming sites at close to shore areas both in Norway and worldwide, there is a need to develop fish farms suitable for aquaculture ... -
Numerical Optimisation of a Classical Stochastic System for Targeted Energy Transfer
(Peer reviewed; Journal article, 2022)The paper studies stochastic dynamics of a two-degree-of-freedom system, where a primary linear system is connected to a nonlinear energy sink with cubic stiffness nonlinearity and viscous damping. While the primary mass ... -
Numerical Simulation of Breaking Wave Loading on Standing Circular Cylinders with Different Transverse Inclined Angles
(Peer reviewed; Journal article, 2020)The purpose of this paper is to numerically simulate the breaking wave past a standing cylinder with different transverse inclined angles. The numerical simulations are carried out by solving the Unsteady Reynolds-Averaged ...