Sökning: "Richardson model"

Visar resultat 11 - 15 av 15 avhandlingar innehållade orden Richardson model.

1. 11. On the Arctic Boundary Layer : From Turbulence to Climate

   Författare :Thorsten Mauritsen; Gunilla Svensson; Joao Teixeira; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atmospheric boundary layers; Turbulence; Stable stratification; Gravity waves; Mesoscale motion; Arctic climate; Meteorology; Meteorologi; atmosfärvetenskap; Atmospheric Sciences;

   Sammanfattning : The boundary layer is the part of the atmosphere that is in direct contact with the ground via turbulent motion. At mid-latitudes the boundary layer is usually one or a few kilometers deep, while in the Arctic it is much more shallow, typically a few hundred meters or less. LÄS MER

3. 12. Short term water heat storage : an experimental and numerical investigation of phenomena that affect the degree of thermal stratification

   Författare :Roger Hermansson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

   Sammanfattning : Thermal stratification was studied by measurements of the temperature and velocity fields in water heat storage's and by numerical simulations. The work includes experimental investigations in three model heat storage's of different size and comparisons to numerical simulations for two of the storages. LÄS MER

4. 13. Studies of the flow pattern in short term hot water storages

   Författare :Pascal Veber; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

   Sammanfattning : This thesis relates to the study of thermally stratified hot water storages used in district heating systems and is an extension of the doctoral theses of Jan Dahl and Roger Hermansson. The thermal performance of a stratified water storage is reduced by different phenomena such as heat transfer to the surroundings and mixing between hot and cold water during the charging of the tank. LÄS MER

5. 14. The Uncertainty-Embedded Innovation Process : A study of how uncertainty emerges in the innovation process and of how firms address that to create novelty

   Författare :Sabrina Luthfa Karim; Gabriel Baffour Awuah; Mikael Hilmersson; Klaus Solberg Søilen; Anna Öhrwall Rönnbäck; Högskolan i Halmstad; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Innovation process; Uncertainties; Compromised and uncompromised actions; Actors; Resources; Activities; Activity links; Activity void;

   Sammanfattning : Despite much discussion in the literature of uncertainties in relation to the innovation process, there is little knowledge of how they emerge in this process. This thesis accordingly aims to understand how uncertainty emerges in the innovation process and how firms address that uncertainty to create novelty from the process. LÄS MER

7. 15. Organising Industrial Activities - An analytical framework

   Författare :Anna Dubois; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; activity structures; complementarities; activities; activity chains; dependencies; boundaries; networks; similarities;

   Sammanfattning : The way in which industrial activities are organised among firms has been a fundamental theoretical concern for a long time. In practice, firms have found these matters, referred to as make-or-buy issues, difficult to analyse. LÄS MER