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Thermal Ratchet Effect in a Rotating Ferrofluid
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Volker Becker
Published/Copyright:
September 25, 2009
Summary
Rotational Brownian motion of a colloidal magnetic particle in a ferrofluid under the influence of an external magnetic field may give rise to a noise induced rotation of the particle due to the rectification of thermal fluctuations. Via viscous coupling the associated angular momentum is transferred to the carrier liquid and can be measured as a macroscopic torque. In the present contribution we study the case of a rotating ferrofluid and elucidate the interplay between the ratchet effect and the non-zero vorticity of the flow.
Received: 2005-9-1
Accepted: 2005-10-18
Published Online: 2009-9-25
Published in Print: 2006-2-1
© by Oldenbourg Wissenschaftsverlag, München
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Articles in the same Issue
- Magnetic Nanoparticles for Biomedical Heating Applications
- Characterization of the Grain Size in Ferromagnetic Colloids: Comparing Torsional-Pendulum Measurements with Standard Complementary Methods
- Structural and Magnetic Properties of Ni/NiOxide- and Co/CoOxide Core/Shell Nanoparticles and their possible Use for Ferrofluids
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- Gravity Level Influence on a Laterally Heated Ferrofluid Submitted to an Oblique Strong Magnetic Field
- Determination of the Thermo and Magneto Phoresis by the Dissipative Function
- Magnetization of Rotating Ferrofluids: Predictions of Different Theoretical Models
- Thermal Ratchet Effect in a Rotating Ferrofluid
- Distribution of Mitoxantrone after Magnetic Drug Targeting: Fluorescence Microscopic Investigations on VX2 Squamous Cell Carcinoma Cells
- Some Immobilization Modes of Biologically Active Substances to Fine Magnetic Particles
- On Magnetic Field Control Experiments of Ferrofluid Convection Motion
