Sökning: "Buoyancy method"
Visar resultat 1 - 5 av 15 avhandlingar innehållade orden Buoyancy method.
1. Distribution of Ventilation Air and Heat by Buoyancy Forces inside Buildings : An Experimental Study
Sammanfattning : The main task of the ventilation system in a building is to maintain the air quality and (together with the heating or cooling system) the thermal climate at an acceptable level within the building. This means that a sufficient amount of ventilation air at the appropriate temperature and quality must be supplied to satisfy thermal comfort and air quality demands and that this air is distributed to the parts of the building where people reside. LÄS MER
2. Modelling of Turbulent Flow and Heat Transfer for Building Ventilation
Sammanfattning : This thesis contributes to studies on the assessment of building ventilation performance and the development of turbulence models accounting for Low-Reynolds-number (LRN) effects and buoyant convection with heat transfer. Assessments of building ventilation performance are discussed with respect to indoor air distribution and passive contaminant dispersion. LÄS MER
3. Turbulence modelling applied to the atmospheric boundary layer
Sammanfattning : Turbulent flows affected by buoyancy lie at the basis of many applications, both within engineering and the atmospheric sciences. A prominent example of such an application is the atmospheric boundary layer, the lowest layer of the atmosphere, in which many physical processes are heavily influenced by both stably stratified and convective turbulent transport. LÄS MER
4. Turbulence Modelling for Internal Cooling of Gas-Turbine Blades
Sammanfattning : Numerical simulations of geometrical configurations similar to those present in the internal cooling ducts within gas turbine blades have been performed. The flow within these channels are characterized by heat transfer enhancement ribs, sharp bends, rotation and buoyancy effects. LÄS MER
5. Estimating the Air-Water Gas Transfer Velocity during Low Wind Conditions
Sammanfattning : The abundances of atmospheric carbon dioxide, CO2, and methane, CH4, are increasing. These increases affect e.g., the global carbon cycle and the climate both regionally and globally. LÄS MER