Vibration Characteristics of Magnetic Fluid Droplet Adsorbed to Magnetized Needlepoint in Alternating Magnetic Field

2012 ◽  
Vol 721 ◽  
pp. 108-113
Author(s):  
Sota Inomata ◽  
Seiichi Sudo ◽  
Hidemasa Takana ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fluid ◽  
High Speed ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Camera System ◽  
High Speed Video ◽  
High Speed Video Camera ◽  
Video Camera System

The dynamic behavior of a magnetic fluid droplet adsorbed to magnetized needlepoint in alternating magnetic field was studied with a high speed video camera system. The directions of alternating magnetic field were parallel and opposite to static magnetic field of magnetized needlepoint. It was found that the surface of magnetic fluid droplet responds to the external magnetic field in elongation and contraction. The frequency of magnetic fluid droplet oscillation was exactly same of the external magnetic field. The shape and instability oscillations of the magnetic fluid droplet were revealed experimentally.

Dynamic Interfacial Phenomena at Water-Magnetic Fluid System Subject to Alternating Magnetic Field

2016 ◽  
Vol 856 ◽  
pp. 15-20
Author(s):  
Masato Nakanishi ◽  
Seiichi Sudo ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
High Speed ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Fluid System ◽  
Camera System ◽  
High Speed Video Camera ◽  
Rosensweig Instability

Responses of a magnetic fluid interface adsorbed on a small permanent magnet in water container subjected to an alternating magnetic field were studied with a high-speed video camera system. The directions of the external alternating magnetic field were parallel and anti-parallel to that of the permanent magnet. It was found that the interface of water-magnetic fluid responds to the external alternating magnetic field in elongation and contraction with Rosensweig instability at the interface. Frequency characteristics of the interface response of water-magnetic fluid system subjected to alternating magnetic field were revealed over a wide frequency band experimentally.

Alternating Magnetic Field Responses of Magnetic Fluid Drop Adsorbed to a Small Permanent Magnet

2012 ◽  
Vol 721 ◽  
pp. 102-107 ◽  
Author(s):  
Seiichi Sudo ◽  
Daisaku Asano ◽  
Hidemasa Takana ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
High Speed ◽  
Experimental Studies ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Camera System ◽  
Fluid Drop

Experimental studies of the behavior of magnetic fluid drop under the effect of an external alternating magnetic field were performed using a high speed digital video camera system. A small permanent magnet was immersed in magnetic fluid drop, and it was fixed with an aluminum bar. The surface of magnetic fluid responded to the external magnetic field sensitively. The free surface of the magnetic fluid drop responded to the external alternating field in elongation and contraction along the direction of the field. The capillary magnetic fluid jet was produced at the certain external magnetic field condition.

Characteristics in the Opening and Closing Operations of Micro Magnetic Fluid Diaphragm Mechanism by Alternating Magnetic Field

2016 ◽  
Vol 856 ◽  
pp. 26-31 ◽  
Author(s):  
Seiichi Sudo ◽  
Masato Nakanishi ◽  
Michihiro Shinozaki ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
High Speed ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Camera System ◽  
Response Characteristics ◽  
High Speed Video Camera ◽  
Opening And Closing

Response characteristics in the opening and closing operations of the micro magnetic fluid diaphragm mechanism by the alternating magnetic field are described. The micro magnetic fluid diaphragm mechanism was composed of a ring shaped permanent magnet and kerosene-based magnetic fluid. The driving principle of micro magnetic fluid device was based on the surface phenomena of magnetic fluid adsorbed on a permanent magnet. The opening and shutting time of diaphragm mechanism in the alternating magnetic field was measured by high-speed video camera system. The details of magnetic fluid surface response in the opening and closing operations of magnetic fluid hole were revealed experimentally.

Measurement of Spraying Particle Behaviors by Three-Intensified-Sensor Color High Speed Video Camera System

1998 ◽  
Author(s):  
M. Yamakawa ◽  
S. Oki ◽  
S. Gohda
Keyword(s):  
High Speed ◽  
Optical Filter ◽  
Video Camera ◽  
Image Sensors ◽  
Camera System ◽  
Spray Coatings ◽  
High Speed Video ◽  
Simultaneous Measurements ◽  
High Speed Video Camera ◽  
Video Camera System

Abstract Three-intensified-sensor color high speed video camera system with a cubic three-way beam-split prism and three optical filter holders has been developed. One of three image sensors can be assigned for the measurement of velocity and the others for that of temperature. Simultaneous measurements of temperature and velocity of sprayed particles are tried with this camera for understanding of the formation mechanism of spray coatings. The possibility of measuring the velocity of individual particle in plasma spraying is discussed for behavior analysis of sprayed particles with three-intensified- sensor color high speed video camera system. Furthermore the possibility for simultaneous measurements of temperature and velocity of individual sprayed particles is examined.

Sign in / Sign up

Export Citation Format

Share Document