Recent additions

  • 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 ...
  • Multiphysics study of infrared thermography (IRT) applications 

    Andleeb, Zahra; Ilyas, Muhammad; Khawaja, Hassan; Moatamedi, Mojtaba (Conference object; Konferansebidrag, 2019-12)
    Infrared thermography is the science of detecting infrared energy emitted from an object, converting it to apparent temperature, and producing images of that radiation, called thermograms. Infrared thermography means "beyond red temperature image". IR thermography being a remote non-contact/non-destructive means of testing is perfectly suitable for tests in extreme environments. Also, it is fast, ...
  • Best Venue to Disseminate Multiphysics Research 

    Khawaja, Hassan (Conference object; Konferansebidrag, 2019-12)
    Multiphysics analysis has been developed over the recent past to better represent the behaviour of complex processes by the use of simultaneous modelling of a number of systems. This development is driven by the industrial need to further the understanding of real physical phenomena in order to develop and design safer and more efficient products which are environmentally friendly. Such analyses ...
  • The International Conference of MULTIPHYSICS 2020 

    Khawaja, Hassan (Conference object; Konferansebidrag, 2019-12)
    Multiphysics analysis has become increasingly important in recent years due to demand in design and understanding of complex systems. The objective of the conferences is to share and explore findings on mathematical advances, numerical modelling and experimental validation of theoretical and practical systems in a wide range of applications.
  • Towards a Framework for Noctilucent Cloud Analysis 

    Sharma, Puneet; Dalin, Peter; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    In this paper, we present a framework to study the spatial structure of noctilucent clouds formed by ice particles in the upper atmosphere at mid and high latitudes during summer. We studied noctilucent cloud activity in optical images taken from three different locations and under different atmospheric conditions. In order to identify and distinguish noctilucent cloud activity from other objects ...
  • IR Thermography of Steel Specimens undergoing Tensile Tests 

    Stange, Even; Khawaja, Hassan (Conference object, 2018-12-13)
    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 generated using a hand-operated hydraulic system. A dial gauge measured the elongation of the specimens. Using the WP 300.20 system for data ...
  • A comparative study of CO2 heat pump performance for combined space and hot water heating 

    Brodal, Eivind; Jackson, Steven (Journal article; Peer reviewed, 2019-08-20)
    Heat pumps used for combined space and hot water heating are often used in modern energy-efficient buildings. Performance depends on both system design (exchanger sizes, compressor efficiency, etc.) and operating conditions (inlet water temperature, ratio between space and water heating, etc.). Designs using both CO2 and HFCs, such as R410A, are available, but the relative performance of these is ...
  • Performance and Design Study of Optimized LNG Mixed Fluid Cascade Processes 

    Brodal, Eivind; Jackson, Steven; Eiksund, Oddmar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-26)
    Mixed Fluid Cascade (MFC) processes are often claimed to be one of the most efficient methods to liquefy natural gas. Their performance depends on both operating conditions such as ambient temperature, and system design parameters such as exchanger sizes. The performance of the standard MFC process can be further improved by modifying the design with additional equipment, such as liquid refrigerant ...
  • Multiphysics Impact Analysis of Carbon Fiber Reinforced Polymer (CFRP) Shell 

    Strand, Cathrine Høgmo; Andleeb, Zahra; Khawaja, Hassan; Moatamedi, Mojtaba (Journal article; Peer reviewed, 2019-07-30)
    With increasing popularity of Carbon Fiber Reinforced Polymer (CFRP) over time, the need for research in the field has increased dramatically. Many industries, i.e. aeronautical, automotive, and marine are opting to install carbon fiber in their structures to account for harsh environments like cold temperatures applications, but the research on the temperature exposure behavior of the materials are ...
  • Playing a video game is more than mere procrastination 

    Nordby, Kent; Løkken, Ronny Andre; Pfuhl, Gerit (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-13)
    <i>Background</i>: Procrastination is seen as a severe problem among young people, and many factors have been claimed to be associated with it, playing video games being one of them. One of the reasons why video games might be related to procrastination is their ability to offer instant gratification and feedback, while at the same time offer distractions from less tempting and rewarding tasks. ...
  • Multiphysics Study of Tensile Testing using Infrared thermography 

    Stange, Even; Andleeb, Zahra; Khawaja, Hassan; Moatamedi, Mojtaba (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 generated using a handoperated hydraulic system. A dial gauge measured the elongation of the specimens. Using the WP 300.20 system for data ...
  • Comparison of Explicit Method of Solution for CFD Euler Problems using MATLAB® and FORTRAN 77 

    Nordli, Anders Samuelsen; Khawaja, Hassan (Journal article; Peer reviewed, 2019)
    This work presents a comparison of an explicit method of solution for an inviscid compressible fluid mechanics problem using Euler equations for two-dimensional internal flows. The same algorithm was implemented in both FORTRAN 77 and MATLAB®. The algorithm includes Runge‒Kutta time marching scheme with smoothing. Both solvers were initialized in the same manner. In addition, it was ensured that ...
  • Optimization of the Energy Consumption of a Carbon Capture and Sequestration Related Carbon Dioxide Compression Processes 

    Jackson, Steven; Brodal, Eivind (Journal article; Peer reviewed, 2019-04-26)
    It is likely that the future availability of energy from fossil fuels, such as natural gas, will be influenced by how efficiently the associated CO2 emissions can be mitigated using carbon capture and sequestration (CCS). In turn, understanding how CCS affects the efficient recovery of energy from fossil fuel reserves in different parts of the world requires data on how the performance of each part ...
  • Fluid-Structure Interaction (FSI) Modelling of Aquaculture Net Cage 

    Myrli, Odd Einar; Khawaja, Hassan (Journal article; Peer reviewed, 2019)
    The number of good sites in less exposed locations for aquaculture farming is limited. Trends are now that the fish cages are increasing in both width and depth, as well as more weather-exposed locations, are taken into use. As the net cages continue to increase in size, so does the material costs. The design of the sea cages should be modified for safe and reliable use in remote offshore locations. ...

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