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  • Academic and research collaboration between the IVT departments 

    Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2024)
  • A Convergent Numerical Algorithm for α-Dissipative Solutions of the Hunter–Saxton Equation 

    Christiansen, Thomas; Grunert, Katrin; Nordli, Anders Samuelsen; Solem, Susanne (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-02)
    A convergent numerical method for α -dissipative solutions of the Hunter–Saxton equation is derived. The method is based on applying a tailor-made projection operator to the initial data, and then solving exactly using the generalized method of characteristics. The projection step is the only step that introduces any approximation error. It is therefore crucial that its design ensures not only a ...
  • Multiphysics in Engineering Education: Bridging Theory and Practice 

    Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2024-02-15)
    Multiphysics, the interdisciplinary field that integrates multiple physical phenomena into a unified framework, has emerged as a pivotal aspect of contemporary engineering education. This abstract explores the profound role of multiphysics in shaping the educational landscape, fostering a holistic approach that transcends traditional disciplinary boundaries. <p> <p>In the ever-evolving realm of ...
  • Electrical stunning and killing of lumpfish with commercial waterbath and dry stunners 

    van de Vis, Hans; Reimert, Henny; Grimsbø, Endre; Gerritzen, Marien; Foss, Atle; Roth, Bjørn (Research report; Forskningsrapport, 2024-02-12)
    Lumpfish, ranging in size from 146-4200 g, were placed in an electric dry stunning unit head first and exposed to 50 Hz, 240 V AC for 0.5 or 1 s and thereafter 4.5 or 9 s of electricity, thus 5 and 10 s respectively. In seawater, lumpfish were exposed to an electric field equivalent of 4.6 Vrms/cm, 100 pps square AC, with 15% duty cycle for 1 s and thereafter 9 s. This to verify whether the animal ...
  • Havforskningsinstituttets rådgivning for menneskeskapt støy i havet - Kunnskapsgrunnlag, vurderinger og råd for 2024 

    Forland, Tonje Nesse; Sivle, Lise Doksæter; de Jong, Karen; Pedersen, Geir; Strømme, Marte Louise; Kutti, Tina; Durif, Caroline; McQueen, Kate; Grimsbø, Endre; Wehde, Henning (Research report; Forskningsrapport, 2023)
    Havforskningsinstituttet gir råd for alle operasjoner til havs som involverer bruk av lydkilder, samt elektromagnetiske kilder som kan påvirke marine økosystemer. Dette inkluderer vitenskapelige undersøkelser, utbygging og sprenging i sjø, seismiske og elektromagnetiske undersøkelser i forbindelse med petroleumsvirksomhet , og utbygging og drift av vindkraftanlegg til havs. Denne rapporten er en ...
  • Preface 

    Soleiman Fallah, Arash; Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Chapter; Bokkapittel, 2024-01-18)
    In the ever-advancing realm of renewable energy, wind turbines have unfurled as magnificent guardians, capturing the boundless energy of the wind to lead us toward a cleaner, greener future. Within this captivating landscape, we proudly unveil “Multiphysics of Wind Turbines in Extreme Loading Conditions.” This book is concerned with one aspect of wind turbines which is deal-ing with multiphysics ...
  • Ice shedding from wind turbines 

    Khawaja, Hassan Abbas; Xue, Hui; Eidesen, Hans-Kristian; Andleeb, Zahra; Moatamedi, Mojtaba (Chapter; Bokkapittel, 2024)
    Wind power is an excellent source of renewable energy in areas with sufficient wind resources. Usually, the best locations for wind turbines are on the tops of hills and ridges, where there are lower temperatures [1]. Cold temperatures are responsible for novel challenges [2, 3]. Due to cold climatic conditions, turbine blades are subjected to icing [4]. A number of methods have been proposed and ...
  • Multiphysics modeling of wind turbines 

    Soleiman Fallah, Arash; Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Chapter; Bokkapittel, 2024)
    According toThe International SocietyofMultiphysics (“Definition— MULTIPHYSICS”),multiphysics (sometimes spelledasmulti-physics) is defined as a coupled modeling approach of studies that demands simultaneous addressing of hitherto separate physical disciplines and combining them to generate relational mathematical models and validate them with controlled experiments to enhance the understanding of ...
  • pH-dependent endocytosis mechanisms for influenza A and SARS-coronavirus 

    Aganovic, Amar (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-10)
    The ongoing SARS-CoV-2 pandemic and the influenza epidemics have revived the interest in understanding how these highly contagious enveloped viruses respond to alterations in the physicochemical properties of their microenvironment. By understanding the mechanisms and conditions by which viruses exploit the pH environment of the host cell during endocytosis, we can gain a better understanding ...
  • A Qualitative Comparison of ANSYS and OpenFOAM results for Carbon dioxide Plume Transport 

    Madsen, Synne; Andleeb, Zahra; Khawaja, Hassan Abbas; Boiger, Gernot; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-02)
    This research presents Computational Fluid Dynamics (CFD) simulations in ANSYS® illustrating emissions of to the air. The CFD simulations is employed to study plume transport in urban environment, i.e., Breivika port in the city of Tromsø. The case study presents a two-phase model considering specific wind strength and direction in the city of Tromsø. Geographical coordinates, temperature, and wind ...
  • Multiphysics: Paving the Future of Engineering 

    Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2023-12)
    The landscape of engineering is undergoing a transformative evolution, and at its forefront is the paradigm of multiphysics—a revolutionary approach that integrates and simulates multiple physical phenomena within a single computational framework. This abstract explores the significance of multiphysics in shaping the future of engineering and its profound impact on innovation, efficiency, and ...
  • Investigating RANS Turbulence Models for Predicting Airflow Dispersion in Enclosed Environments: Numerical Simulation and Experimental Validation 

    Owolabi, Jibola Obafemi; Dhar, Sushmit; Muhammed, Manaf; Khawaja, Hassan Abbas; Aganovic, Amar; Virk, Muhammad Shakeel (Conference object; Konferansebidrag, 2023-12)
    The dispersion of respiratory aerosol particles in enclosed environments poses a significant challenge to understanding the transmission of airborne infectious diseases, mainly due to the influence of turbulence on the propagation of aerosol particles. Turbulence, with its complex and chaotic nature, is a prevailing phenomenon in a fluid flow. Four widely used Reynolds-Averaged Navier-Stokes (RANS) ...
  • Multiphysics Study of Thermal Properties of Neoprene and Natural Rubber for Wetsuit Applications 

    Busvold, Mads; Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2023-12)
    Surfers daring the harshest waves, including the frigid arctic waters of Norway, rely on wetsuits for extended cold-water sessions. Understanding the thermal behavior of wetsuit materials is crucial for enhancing surfers' comfort and safety. In this study, we investigate the thermal properties of neoprene and natural rubber, the primary materials used in wetsuit construction, with a focus on conductive ...
  • The International Conference of Multiphysics 2024 

    Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2023-12)
    The objective of The International Conference of Multiphysics 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. The scope of the conference is to address the latest advances in theoretical developments, numerical modelling and industrial application which will promote ...
  • The International Journal of Multiphysics (2023) 

    Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2023-12)
    The International Journal of Multiphysics publishes peer-reviewed original research articles, review papers and communications in the broadly defined field of Multiphysics. The emphasis of this journal is on the theoretical development, numerical modelling and experimental investigations that underpin Multiphysics studies. The scope of the journal is to address the latest advances in theoretical ...
  • Investigating Ice Nucleation and Heat Transfer Dynamics in Supercooled Liquid Water Using Thermography 

    Khawaja, Hassan Abbas; Keshavarzi, Samaneh; Muhammed, Manaf; Yousuf, Adeel; Virk, Muhammad Shakeel; Harvey, Derek; Momen, Gelareh (Conference object; Konferansebidrag, 2023-12)
    This study delves into the intricate interplay of thermography, ice nucleation, and heat transfer during the phase change from supercooled liquid water to crystallized ice. The phenomena of ice nucleation and its subsequent growth have paramount importance in various fields, including cold climate engineering, atmospheric science, cryopreservation, and refrigeration systems. Our research aims to ...
  • A CFD Study of Preventing Snow Accumulations on Roofs using Airflows 

    Sjøveian, Andreas; Andleeb, Zahra; Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Conference object; Konferansebidrag, 2023-12)
    Today, there is an abundance of roof designs for buildings, each possessing distinct characteristics when subjected to snowy and cold conditions. Snow buildup on roofs poses various risks, including structural damage and personal injuries. Snow loads can lead to severe building damage or even collapse. The presence of intricate roof shapes and valleys exacerbates the potential harm caused by snow. ...
  • Analysis of parameters influencing pathogen concentration in a room with displacement ventilation using computational fluid dynamics and Taguchi methods 

    Yuce, Bahadir Erman; Aganovic, Amar; Nielsen, Peter Vilhelm; Wargocki, Pawel (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-30)
    Analyzing multiple physical factors simultaneously to determine optimal ventilation solutions can be challenging. Furthermore, this type of analysis needs a large case number to be investigated, making the problem’s solution unfeasible. This study tackled these challenges by integrating Computational Fluid Dynamics (CFD) with the Taguchi method to overcome these issues. Our previous research ...
  • A two-component nonlinear variational wave system 

    Nordli, Anders Samuelsen; Aursand, Peder Kristian (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-14)
    We derive a novel two-component generalization of the nonlinear variational wave equation as a model for the director field of a nematic liquid crystal with a variable order parameter. The equation admits classical solutions locally in time. We prove that a special semilinear case is globally well-posed. We show that a particular long time asymptotic expansion around a constant state in a moving ...
  • Electrical stunning and killing of Atlantic salmon 

    van de Vis, Hans; Reinert, Henny; Grimsbø, Endre; Roth, Bjørn (Research report; Forskningsrapport, 2023)
    Atlantic salmon (Salmo salar) at various size 226-1938 g were placed in electric dry stunning either tailor head- first and then exposed to 50 Hz, 240 V AC for 0.5 and thereafter 9.5 s of electricity. This to verify whether the animal is rendered unconscious prior to killing by immersing the animal into cold brine (-14 to -18 °C) or hypoxic water, supersaturated with CO2. In addition, salmon from ...

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