Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Eckelmann, Helmut Prof. Dr."
Now showing items 1-10 of 10
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Active cancellation of 3D Tollmien-Schlichting waves in the presence of sound and vibrations.
(2002-12-13)In order to delay the laminar-turbulent transition in a boundary layer flow, the cancellation of 2D- and 3D instability waves by artificially excited counter-disturbances is investigated. ... -
Zeitlich modulierte Statistik der periodisch gestörten turbulenten Kanalströmung
(2002-03-25)The turbulent channel flow is subjected to a temporal change of the boundary conditions, either by periodic variation of a longitudinal wall speed or, alternatively, by periodic variation ... -
Experimentelle und numerische Untersuchungen zur Ausbreitung von Volumenstörungen in thermischen Plumes.
(2002-03-01)The propagation of wavelike disturbances in thermal plumes conduit is studied in laboratory experiments and numerical simulations. In experiments thermal plumes are created by injecting hot ... -
Untersuchung der Strukturen von künstlich angeregten transitionellen Plattengrenzschichtströmungen mit Hilfe der Stereo und Multiplane Particle Image Velocimetry
(2001-12-05)Stereoscopic and Multi-plane PIV measurements on artificially excited transitional boundary layer flows along a flat plate will be presented. The experimental results are focused on the ... -
Dynamische Stabilisierung einer Grenzschichtströmung unter Berücksichtigung nichtlinearer Störausbreitungsprozesse
(2001-10-16)In order to delay the laminar-turbulent transition in a boundary-layer flow, the compensation of instability waves by artificially excited disturbances is under investigation. To generate ... -
Mehrkomponenten-Laser-Doppler-Anemometer-Messungen in einer drallbehafteten Rohr- und Brennkammerströmung
(2001-06-06)Swirl flows, i.e. axisymmetric jet flows with a non zero circumferential velocity, are important in technology as well as in nature. Swirl flows occur in a wide range of applications like ... -
Der Einfluss von Rotation auf Konvektion und Kristallisation eines binären eutektischen Systems in Hinblick auf den Erdkern
(2000-09-22)In the cooling Earth the fluid outer core consists of a molten alloy over the solidifying inner core. Here, compositional convection due to the preferential solidification of the heavy phase ... -
Numerische Untersuchungen zur Wechselwirkung von Mantelplumes mit Mittelozeanischen Rücken
(2000-08-21)The interaction of mantle plumes with mid-ocean ridges is investigated in 3-D numerical convection models. A new numerical method for solving convection problems with variable viscosity in ... -
Numerische Untersuchung zur instationären Kutta-Bedingung
(2000-08-02)