Search for dissertations about: "natural convection"

Showing result 16 - 20 of 138 swedish dissertations containing the words natural convection.

  2. 16. Kilometer-scale climate modeling of precipitation in the Nordic region

    Author : Petter Lind; Erik Kjellström; Erik Kolstad; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Convection-permitting climate modeling; Precipitation; Extremes; Atmospheric convection; Nordic region; Climate change; Observations; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Abstract : Future changes in precipitation, in particular extremes, are among the most impact-relevant consequences of a warming climate driven by increases in atmospheric greenhouse gas concentrations. Still, climate model projections of future changes in regional and local precipitation remain uncertain. READ MORE

  4. 17. Natural Convection Heat Transfer in a Horizontal Thermal Insulation Layer Underlying an Air Layer

    Author : Mihail Serkitjis; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air layer; thermal insulation; composite system; heat transfer; numerical simulation; natural convection; porous layer; measurements; testing equipment;

    Abstract : In the thesis a study is made of the influence of natural convection on heat transfer in a composite system comprising a porous material heated from below and an air space situated above this. The measuring apparatus, a Wind Box which has been designed and developed at the Department of Building Physics is described. READ MORE

  5. 18. Development, validation and application of an effective convectivity model for simulation of melt pool heat transfer in a light water reactor lower head

    Author : Chi Thanh Tran; Truc-Nam Dinh; Florian Fichot; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; light water reactor; hypothetical severe accident; accident progression; accident scenario; core melt pool; heat transfer; turbulent natural convection; heat transfer coefficient; phase change; mushy zone; crust; lower plenum; analytical model; effective convectivity model; CFD simulation.; Other physics; Övrig fysik;

    Abstract : Severe accidents in a Light Water Reactor (LWR) have been a subject of the research for the last three decades. The research in this area aims to further understanding of the inherent physical phenomena and reduce the uncertainties surrounding their quantification, with the ultimate goal of developing models that can be applied to safety analysis of nuclear reactors. READ MORE

  6. 19. Hydrodynamics and heat convection in channels with vibrating walls

    Author : Fredrik Carlsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this work a combined analytical and numerical study of the non-linear effects of transverse wall vibrations on fluid flows are presented. Streaming motions and their effect on heat and mass transfer are investigated for a viscous fluid confined in an infinite channel with flexible walls. READ MORE

  7. 20. On the Convective-Scale Predictability of the Atmosphere

    Author : Lisa Bengtsson; Gunilla Svensson; Glenn Shutts; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cumulus convection; cellular automata; model uncertainty; sub-grid scale processes; numerical weather prediction; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : A well-represented description of convection in weather and climate models is essential since convective clouds strongly influence the climate system. Convective processes interact with radiation, redistribute sensible and latent heat and momentum, and impact hydrological processes through precipitation. READ MORE