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Investigation of torsional drillstring motion using finite element model
(Master thesis, 2021)In the thesis , a four degree of freedom dynamic drill string model suitable for prediction of self-excited torsional vibrations is modeled using the finite element method. The drill string equation of motion subjected to ... -
Investigation of transient scenarios in underbalanced drilling
(Masteroppgave/UIS-TN-IPT/2012;, Master thesis, 2012)When drilling underbalanced wells, the standard way consists to drill with a very low mud weight in order to obtain a well pressure lower than pore pressure. The flow of the fluids from the reservoir up to the tubing is ... -
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 ... -
Investigation of transitional turbulence models to predict drag crisis for flow over spheres and cylinder
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-14)The current work performed experimental and numerical studies of flow over cylinders and spheres. The purpose is to investigate whether the drag crisis phenomenon can be predicted, and to gain insight into the transition ... -
Investigation of updating methods for probability-informed inspection planning for offshore structures
(Peer reviewed; Journal article, 2019)The paper presents a novel process for probability-informed inspection planning based on the following principles. 1) A description of the strength of knowledge about a problem shall be included and be accounted for in the ... -
Investigation of vibration assisted cementing - a CFD study
(Master thesis, 2021)Abstract Primary cementing operations in the oil and gas industry are considered critical and complicated. For cementing operations to be successful, the fluid displacement in the annular volume has to be close to perfect. ... -
Investigation of Vinyl Ether Synthesis and Subsequent Application in Organic Synthesis
(Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-06-15)The standard method of synthesizing vinyl ethers from the elimination of an alcohol from an acetal was tested against synthesizing them through the elimination of a mesyloxy group. A total of seven different molecules were ... -
Investigation of which sea state yield the dominating contribution to fatigue accumulation in offshore structures
(Masteroppgave/UIS-HF-IKM 2014;, Master thesis, 2014-06-23)Majority of the fatigue damage on offshore structures is generally assumed to be caused by relatively frequently occurring moderate sea states, i.e. sea states with significant wave height in the range of 4m - 8m.On the ... -
Investigation on Phosphorus Recovery from Wastewater Sludge as Struvite at SNJ Wastewater Treatment Plant (IVAR): A Pilot-Scale Study
(Master thesis, 2021)The recovery of phosphorus from wastewater is desirable since it is a limited nutrient and can cause eutrophication in water bodies. This study investigates the potential to recover phosphorus from the sludge generated at ... -
Investigation on The Mechanical Properties of CO2 Cured Concrete with Natural Aggregates.
(Bachelor thesis, 2021)Betongproduksjon er en av industriene med størst CO2 utslipp i verden. En liten reduksjon i CO2 utslippene fra denne industrien kan derfor være svært gunstig for å nå klimamålene. Herding ved akselerert karbonatisering ... -
Investigation on the Mechanical Properties of Lightweight Concrete with CO2 Curing
(Master thesis, 2021) -
Investigations of a drilling operation by using a simplified gas-liquid mathematical model
(Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-05-22)There was a strong wish to investigate the physics of fluid flow involved in drilling operations where nitrogen injection is used to lower the hydrostatic pressure. This work is based on a reduced version of the full ... -
Investigations of Microstructure and Mechanical Properties of 17-4 Ph Ss Printed by Markforged Metal X
(Peer reviewed; Journal article, 2022-10)The Markforged Metal X (MfMX) printing machine (Markforged Inc., Massachusetts, USA) is one of the latest introduced additive manufacturing (AM) devices. It is getting popular because of its safety, simplicity, and ability ... -
Investigations of Motifs with Positive Feedback
(Master thesis, 2021) -
Investigering av skumsements oppførsel og foradring i logge respons fra tidlig til sen fase.
(Bachelor thesis, 2024)Cementing an oil and gas well can pose significant challenges, particularly due to the static and dynamic pressures exerted by the heavy cement slurry when circulated into the wellbore. A narrow operational window for ... -
Investment Companies' Performance Maintenance Under the Greenhouse Gas protocol
(Master thesis, 2023)The amount of anthropogenic greenhouse gas emissions has seen a substantial increase the past decades resulting in record-high CO2-levels in the atmosphere. In an effort to reduce emissions, several organizations established ... -
Investments in natural gas - an empirical analysis with emphasis on the shale gas revolution
(Masteroppgave/UIS-TN-IØRP/2015;, Master thesis, 2015-06-15)The main objective in this thesis is to investigate how various factors are influencing investments in the US natural gas industry. The thesis puts a special emphasis on the “Shale Gas Revolution” that struck the US natural ... -
Involutions of Quadrics
(Masteroppgave/UIS-TN-IMF/2020;, Master thesis, 2020-07-09)In the introductory chapter, we will explain briefly what all this work is about. First is worthy to mention that the most included area is algebraic geometry, which of course is a combination of algebra and linear algebra. ... -
IORSim: A Mathematical Workflow for Field‑Scale Geochemistry Simulations in Porous Media
(Peer reviewed; Journal article, 2024-06)Reservoir modeling consists of two key components: the reproduction of the historical performance and the prediction of the future reservoir performance. Industry-standard reservoir simulators must run fast on enormous and ... -
IPS GUI-explorer in .NET/UNO
(Bachelor thesis, 2023)Real time systems such as a paint robot are often complex and a lot of data can be extracted and visualized, doing this in an elegant way can prove difficult, and when you want it displayed on multiple platforms, the ...