Sökning: "CFD models"

Visar resultat 6 - 10 av 255 avhandlingar innehållade orden CFD models.

1. 6. Process models for sulphur, hydrogen and inclusion refining

   Författare :Malin Hallberg; KTH; []
   Nyckelord :ladle refining; mathematical modeling; separation of inclusions; sulphur and hydrogen removal; process control; mass-transfer coefficients; CFD;

   Sammanfattning : .... LÄS MER

3. 7. CFD and data-driven modeling for safe spillway discharge

   Författare :Shicheng Li; Anders Ansell; James Yang; Robert Boes; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Discharge safety; hydraulic design; spillway; discharge capacity; aerator; two-phase flow; air entrainment; energy dissipation; CFD; data-driven modeling; Betongbyggnad; Concrete Structures;

   Sammanfattning : A spillway is a crucial dam structure that regulates water levels and prevents the dam from overtopping. The majority of the dams in the world were constructed before the 1980s. Compared to the current design flood standards, many spillways are undersized, e.g. LÄS MER

4. 8. Realistic simulations of delta wing aerodynamics using novel CFD methods

   Författare :Stefan Görtz; Arthur Rizzi; Miguel Visbal; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; CFD; aerodynamics; flow physics; steady; unsteady; delta wing; vortical flow; Rymd- och plasmafysik; Space physics; Rymdfysik;

   Sammanfattning : The overall goal of the research presented in this thesis is to extend the physical understanding of the unsteady external aerodynamics associated with highly maneuverable delta-wing aircraft by using and developing novel, more efficient computational fluid dynamics (CFD) tools. More specific, the main purpose is to simulate and better understand the basic fluid phenomena, such as vortex breakdown, that limit the performance of delta-wing aircraft. LÄS MER

5. 9. Air diffusion and solid contaminant behaviour in room ventilation : a CFD based integrated approach

   Författare :Gery Einberg; Sture Holmberg; hazim Awbi; KTH; []
   Nyckelord :Technology; CFD modelling; airflow rate; ventilation efficiency; diffusers; solid contaminants; IAQ; TEKNIKVETENSKAP; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : One of the most fundamental human needs is fresh air. It has been estimated that people spend comparatively much time in indoor premises. That creates an elevated need for high-quality ventilation systems in buildings. The ventilation airflow rate is recognised as the main parameter for measuring the indoor air quality. LÄS MER

7. 10. Some Aspects on Macroscopic Mixing in a Tundish

   Författare :Chao Chen; Anders Tilliander; Lage Jonsson; Pär Jönsson; Guoguang Cheng; Seppo Louhenkilpi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; continuous reactor; tundish; tracer; macroscopic mixing; water model; CFD; turbulence models; inclusions removal; inclusions deposition; dynamic removal; Materials Science and Engineering; Teknisk materialvetenskap;

   Sammanfattning : Two aspects on macroscopic mixing in a continuous flow system – metallurgical tundish were studied. Specifically, 1) the first focus was on salt solution tracer mixing, which is important for tundish design from perspectives of tracer technology and Residence Time Distributions (RTD) as well as for the understanding of the macroscopic mixing in tundishes. LÄS MER