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Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus

Impresion
EUR 56,50

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EUR 39,60

Flow control of thermal convection using thermo electro hydrodynamic forces in a cylindrical annulus (Tienda española)

Marcel Jongmanns (Autor)

Previo

Indice, PDF (34 KB)
Lectura de prueba, PDF (880 KB)

ISBN-13 (Impresion) 9783736970441
ISBN-13 (E-Book) 9783736960442
Idioma Inglés
Numero de paginas 176
Laminacion de la cubierta mate
Edicion 1.
Lugar de publicacion Göttingen
Fecha de publicacion 08.07.2019
Clasificacion simple Tesis doctoral
Area Ciencias Ingeniería
Palabras claves Fluidmechanik, Strömungslehre, Thermo-Elektrohydrodynamik, Thermo- Elektrohydrodynamik Kraft, Zylinderspalt, Annulus, Dielektrophoretische Kraft, Dielektrophorese, Schwerelosigkeit, Wärmetransport, Thermische Konvektion, Künstliche Schwerkraft, Dielektrische Flüssigkeit, Dielektrikum, Silikonöl, Hochspannung, Elektrisches Feld, Parabelflüge, Raumfahrtanwendung, Strömungszustände, Strömungsmuster, Fluid mechanics, thermo-electrohydrodynamics, thermo-electrohydrodynamic force, cylindrical gap, annulus, dielectrophoretic force, microgravity, heat transfer, thermal convection, artifical gravity, dielectric fluid, dielectric, silicone oil, high-voltage, electric field, parabolic flights, space application, flow state, flow pattern
Descripcion

The main topic of this thesis is the influence of the dielectrophoretic (DEP) force on a thermal convection in a cylindrical annulus under microgravity conditions of parabolic flights. To perform these experiments a specialized experimental setup was designed. The annulus is differentially heated to create a temperature gradient and an ac voltage of up to 10kV is applied. Two different experiment setups were build for different measurement methods. One for Shadowgraph and Synthetic Schlieren methods and the other for PIV measurements. Several complex flow patterns can be identified by combining the resulting images from both visualization mthods. The heat transfer is determined under different experimental conditions. Under the given conditions it is possible to make a correlation between the flow patterns and the level of the convective heat transfer. The experimental data is compared to theoretical data from a linear stability analysis. The patterns predicted by the can also found in the experiments.