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Showing result 1 - 5 of 12 swedish dissertations matching the above criteria.

2. 1. Numerical Modelling of Subcooled Nucleate Boiling for Thermal Management Solutions Using OpenFOAM

   Author : Achref Rabhi; Rebei Bel Fdhila; Konstantinos Kyprianidis; Ioanna Aslanidou; Christophe Duwig; Mälardalens universitet; []
   Keywords : Computational Fluid Dynamics; Boiling Flows; Two-phase cooling; Energy- and Environmental Engineering; energi- och miljöteknik;

   Abstract : Two-phase cooling solutions employing subcooled nucleate boiling flows e.g. thermosyphons, have gained a special interest during the last few decades. This interest stems from their enhanced ability to remove extremely high heat fluxes, while keeping a uniform surface temperature. READ MORE

4. 2. Phase-changing flows: numerical methods and fully resolved simulations

   Author : Nicolo Scapin; Luca Brandt; Christophe Duwig; Outi Tammisola; Matthias Ihme; KTH; []
   Keywords : Phase change; interface-resolved simulations; compressibility; evaporating droplets; evaporation-driven thermal convection.; Teknisk mekanik; Engineering Mechanics;

   Abstract : Flows with evaporation and boiling are abundant in different contexts, such as geophysics, the biomedical sectors, and industrial applications. Spray combustion, boiling bubble flows, oceanic sprays, formation and evolution of clouds, spreading of infectious diseases are all relevant examples where a deeper understanding of phase-changing flows is of great importance. READ MORE

5. 3. Numerical frameworks for small-scale bubble dynamics

   Author : Niklas Hidman; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multiphase; phase change; DNS; moving reference frame; Bubbly flows; cavitation; laser-induced;

   Abstract : Designing efficient bubbly flow systems requires the prediction of the dynamics of the bubbles, the liquid and how the gas and liquid phases interact. Currently, the complex dynamics in bubbly flows are not yet fully explained, and we rely on incomplete models in our numerical methods. READ MORE

6. 4. Experimental and Numerical Investigation of the Quenching Process on Rotary Hollow Cylinder by Multiple Impinging Jets

   Author : Mohammad Jahedi; Bahram Moshfegh; Fredrik Berntsson; Joakim Wren; Rahmatollah Khodabandeh; Högskolan i Gävle; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple jet arrays; Transient boiling; Moving surface; Rotating surface; Inverse heat conduction problem; Quenching; Water impinging jet; Experimental study; Matriser av jetstrålar; Direktverkande jetstrålar; Transient kokning; Roterande yta; Icke-stationär invers värmeledning; Släckning; Experimentell studie; Intelligent industri; Intelligent Industry;

   Abstract : The worldwide competitive market on metal products with higher quality in industry has increased the need to implement more advanced and controllable quenching techniques in the hardening stage of the heat treatment process. Moreover, sustainability and energy efficiency are key factors to consider in the development of advanced quenching techniques. READ MORE

7. 5. On drops and turbulence in nuclear fuel assemblies of Boiling Water Reactors

   Author : Diana Caraghiaur; Henryk Anglart; Michele Andreani; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : The study aims to develop the understanding of the mechanistic-type approach to quantify drop deposition in nuclear fuel assemblies of Boiling Water Reactors. This includes the effect of spacers. READ MORE