Author, institution: Linas Paukštaitis, Kaunas University of Technology
Science area, field: Technological Sciences, Energetics and Power Engineering
The Doctoral Dissertation is available at the libraries of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas) and Lithuanian Energy Institute (Breslaujos St. 3, Kaunas).
Scientific Supervisor:
Prof. Dr. Habil. Jonas GYLYS (Kaunas University of Technology, Technological Sciences, Energetics and Power Engineering, 06T).
Dissertation Defence Board of Energetics and Power Engineering Science Field:
Prof. Dr. Habil. Eugenijus UŠPURAS (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, 06T) – Chairman;
Dr. Antanas MARKEVIČIUS (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, 06T);
Prof. Dr. Habil. Vytautas MARTINAITIS (Vilnius Gediminas Technical University, Technological Sciences, Energetics and Power Engineering, 06T);
Prof. Dr. Liudas PRANEVIČIUS (Vytautas Magnus University Physical Sciences, Physics – 02P);
Prof. Dr. Habil. Stasys ŠINKŪNAS (Kaunas University of Technology, Technological Sciences, Energetics and Power Engineering, 06T).
Official Opponents:
Prof. Dr. Gvidonas LABECKAS (Aleksandras Stulginskis University, Technological Sciences, Energetics and Power engineering, 06T);
Assoc. Prof. Dr. Egidijus URBONAVIČIUS (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, 06T).
Annotation:
Between fluid and body occurs thermal hydrodynamic interaction when the bodies of various form moves in the fluid or fluids overflow the bodies and influences velocity of movement, temperature or energy consumption. Hydrodynamic and heat transfer problems which occur during the contact of the body of different form and fluid usually are investigated by the experimental methods. However such factors as: complication of the investigations, high price of the experimental equipment, safety related and many other similar problems are the reason why recently higher attention is paid to the development and application of the numerical methods of the investigation. Therefore nowadays are widely used different one-dimensional and two-dimensional numerical methods for modeling processes of the hydrodynamics and heat transfer. Sometimes such methods are not applicable for the modeling of the complicated processes because of the high discrepancy between the results of the modeling and the experimental data.
Investigations presented in this work are: movement of the body of the complex form in the air and an influence of the velocity on the drag force; the isolation-control valve of nuclear reactor and the processes of the water vaporization; the fuel channel of the boiling water reactor and the thermal hydrodynamic processes inside the channel; the spherical, cylindrical and streamlined bodies and drag force changes induced by the change of the bodies’ temperature.
The 3D simulation and the results, which are presented in this work, can be applied for the investigation of hydromechanics, heat and mass transfer processes between bodies of a different form and the fluid.
