Now showing items 101-120 of 163

    • IR THERMOGRAPHY in Multiphysics Applications 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2018)
      It is seen that Infrared (IR) thermography is becoming one of the very popular and effective methods in the industry as well as research and development sectors. IR thermography being a remote non-contact/non-destructive means of testing is perfectly suitable for tests in extreme environments. In addition, it is fast, reliable and detailed. Due to the advantages offered by IR thermography, it is ...
    • Is Thorium a Viable Nuclear Fuel? [poster] 

      Khawaja, Hassan; Moatamedi, Mojtaba; Tehrani, Ali (Conference object; Konferansebidrag, 2018)
      Thorium was discovered in 1829 by the Norwegian mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jacob Berzelius, who named it after Thor, the Norse god of thunder. Thorium is more abundant in nature than Uranium. It is fertile rather than fissile, and can only be used as a fuel in conjunction with a fissile material such as recycled plutonium. Thorium fuels can breed ...
    • Infrared Thermography (IRT) of Conjugate Heat Transfer (CHT) Problem and Comparison with Multiphysics Model 

      Khawaja, Hassan; Moatamedi, Mojtaba; Alzahabi, Basem (Conference object; Konferansebidrag, 2018)
      This work presents a problem undergoing conjugate heat transfer (CHT). Conjugate heat transfer problems are common is domestic heating/cooling, industrial heat exchangers, cooling of electronics (e.g. PC fans). It is to be noted that in conjugate heat transfer problems, the convection part of the heat transfer is dominated. In the given study, a hypothetical case is built where a heat source (a ...
    • Sound waves in fluidized bed using CFD–DEM simulations 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2018)
      The seminar is about modelling sound waves in a fluidized bed using CFD–DEM numerical simulations. The presented case includes the application of appropriate initial and boundary conditions to reproduce bed phenomena and the effect of varying the bed height. The results of the simulations matched those from the literature. The pressure and particle velocity profiles obtained feature oscillatory ...
    • Detection, Identification and Size distribution of micro-plastic particles 

      Varughese, Bindu Sara; Edvardsen, Kåre (Conference object; Konferansebidrag, 2017)
      Pollution by micro-plastic in ecosystems is one of the major problems we are facing now, especially in marine environment. Many studies are going on the detection of different micro substances that pollute our environment. Micro-plastics are among the more frequent pollutants of the sort in aquatic ecosystems. There have been some studies earlier on methodologies to detect and identify micro-plastic ...
    • Solution of Pure Scattering Radiation Transport Equation (RTE) using Finite Difference Method (FDM) (poster) 

      Khawaja, Hassan; Moatamedi, Mojtaba (Conference object; Konferansebidrag, 2018)
      Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scattering. Radiative Transfer Equation (RTE) have been applied in a many subjects including atmospheric science, astrophysics, nuclear, optics, remote sensing, etc. Analytic solutions for RTE exist for simple ...
    • 25-years Svalbard data record reveals change in long-range transport of sulphur agents to the warming Arctic 

      Dekhtyareva, Alena (Conference object, 2019)
      Current study investigates the 25-years seasonal trend in the concentration of SO2and non-sea salt SO42-and compares observed changes with the evolution in emission of sulphur agents in primary source regions of anthropogenic aerosols and alteration in characteristics of air masses transporting pollutants to Svalbard.
    • Cold Technology Applications of Infrared Thermography (IRT) 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2019)
    • Multiphysics Study of Infrared Thermography (IRT) Applications 

      Andleeb, Zahra; Malik, Sohail; Hussain, Gulam; Khawaja, Hassan; Roemer, Jakub; Boiger, Gernot; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-19)
      The paper reviews thermographic and vibrothermography applications such as cold climate operations, determine the temperature profile of steel samples under tensile testing and perform composites Non-Destructive Testing (NDT). This review paper discusses studies, where IR thermography has been used effectively in research and development projects at the UiT The Arctic University of Norway and AGH ...
    • Modelling and Simulation of the HDPE Pyrolysis Process 

      Eidesen, Hans-Kristian; Khawaja, Hassan; Jackson, Steven (Conference object; Konferansebidrag, 2017)
      Pyrolysis is a thermochemical decomposition of organic compounds such as High-density polyethylene (HDPE) plastics. The product of the HDPE pyrolysis is usually diesel with other wastes (such as carbon black, etc.). A pyrolysis reaction is essentially a decomposition reaction performed at elevated temperatures in the absence of oxygen. This work aims to describe some of the primary driving reactions ...
    • Fluorescent marking of roads in high-north 

      Khawaja, Hassan; Varughese, Bindu Sara; Edvardsen, Kåre (Conference object; Konferansebidrag, 2017)
      The project objective is to investigate into luminescent coating materials that can be used in marking the roads in high-north. The idea of the project is not entirely new, and efforts have been worldwide to find an energy efficient solution to the street lights. Earlier work conducted in the Netherlands showed quite promising results. However, the challenges include weatherproofing the coat such ...
    • Detection of Cracks and Potholes in Roads using Infrared Thermography 

      Tanveer, Ahmad; Khawaja, Hassan (Conference object, 2017)
      Many remote sensing techniques can be used to identify the cracks/voids on the road surfaces. The given research focuses on applying infrared thermography (IRT). IRT technology can detect features based on the different thermal signature. This method would be an excellent tool for detecting the fracture/cracks. It is because of the reason that the naturally occurring water (rain, snowmelt, etc.) ...
    • A flexible autonomous robotic observatory infrastructure for bentho-pelagic monitoring 

      Aguzzi, Jacopo; Albiez, Jan; Flögel, Sascha; Godø, Olav Rune; Grimsbø, Endre; Marini, Simone; Pfannkuche, Olaf; Rodriguez, Erik; Thomsen, Laurenz; Torkelsen, Terje; Valencia, Javier; López-vázquez, Vanesa; Wehde, Henning; Zhang, Guosong (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-13)
      This paper presents the technological developments and the policy contexts for the project “Autonomous Robotic Sea-Floor Infrastructure for Bentho-Pelagic Monitoring” (ARIM). The development is based on the national experience with robotic component technologies that are combined and merged into a new product for autonomous and integrated ecological deep-sea monitoring. Traditional monitoring is ...
    • Multiphysics Analysis of CFRP Charpy Tests by varying Temperatures 

      Andleeb, Zahra; Strand, Cathrine Høgmo; Malik, Sohail; Hussain, G; Khawaja, Hassan; Boiger, Gernot; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      Carbon Fiber Reinforced Polymer (CFRP) composites have emerged as a major class of structural materials that have a significant potential use as a substitute for metals in aerospace, marine, automotive, and architecture due to their higher-strength-to-weight-ratio. CFRP is well suited for various applications, but their mechanical properties such as ‘low-velocity impact resistance’ are not well ...
    • Development of a Model for the Estimation of the Energy Consumption Associated with the Transportation of CO2 in Pipelines 

      Jackson, Steven (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-12)
      All Carbon Capture and Storage (CCS) projects require the transportation of CO<sub>2</sub> from a source to a storage location. Although, a compressor and a large diameter pipeline is the normal method used to achieve this, liquefaction, shipping and pumping is sometimes attractive. Identifying the economic optimum is important for all CCS projects, minimizing energy consumption is also important ...
    • Dihedral Group D4 - A New Feature Extraction Algorithm 

      Sharma, Puneet (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-04)
      In this paper, we propose a new feature descriptor for images that is based on the dihedral group D<sub>4</sub> , the symmetry group of the square. The group action of the D<sub>4</sub> elements on a square image region is used to create a vector space that forms the basis for the feature vector. For the evaluation, we employed the Error-Correcting Output Coding (ECOC) algorithm and tested our model ...
    • Multiphysics Eulerian-Lagrangian Electrostatic Particle Spray- And Deposition Model for OpenFOAM® and KaleidoSim® Cloud-Platform 

      Boiger, Gernot; Boldrini, M; Lienhard, V; Siyahhan, B; Khawaja, Hassan; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      A finite volume based Eulerian-Lagrangian model has been created within OpenFOAM® in order to predict the behavior of particle clouds as well as particle deposition thicknesses on substrates under the influence of electro-static effects. The model resolves close to electrode effects as well as phenomena within the entire deposition chamber. It considers fluid dynamic effects, particle inertia, ...
    • CFD modelling of pollutant transport from a docked marine vessel: Multiphysics 2019 [poster] 

      Madsen, Synne; Asier, Zubiaga; Khawaja, Hassan; Boiger, Gernot (Conference object; Konferansebidrag, 2019)
      With the increase of the human activities in the Arctic, including land and sea, is resulting in higher release of pollutants to the environment. These pollutants can be categorised as gases released in the air such as carbon dioxide, sulphur dioxide, NOx, etc., and waste released in seas such as chemical toxins, microplastic, etc. This work presents a computational fluid dynamics (CFD) study ...
    • Qualitative visualization of the development of stresses through infrared thermography 

      Stange, Even; Andleeb, Zahra; Khawaja, Hassan (Journal article; Peer reviewed, 2019)
      In this work, the IR thermography was used to study the steel specimens (DIN 50125 Standard) undergoing the tensile tests. The tensile tests were performed using GUNT® Hamburg Universal Material Tester. The tensile specimens were clamped, and the test force was applied using a hand-operated hydraulic system. A dial gauge measured the elongation of the specimens. Using the WP 300.20 system for data ...
    • Optimization of the CO2 Liquefaction Process-Performance Study with Varying Ambient Temperature 

      Jackson, Steven; Brodal, Eivind (Journal article; Peer reviewed, 2019-10-22)
      In carbon capture utilization and storage (CCUS) projects, the transportation of CO2 by ship can be an attractive alternative to transportation using a pipeline, particularly when the distance between the source and usage or storage location is large. However, a challenge associated with this approach is that the energy consumption of the liquefaction process can be significant, which makes the ...