Influence Of Magnetic Field Direction Research Articles

The influence of various preheating and direction of magnetic field on combustion characteristics of palm oil droplets for boiler combustion in power generation system

Research has been carried out on the effect of various preheating and the direction of the magnetic field on the flame characteristics of droplet combustion. This study is important to substitute fuel from fossils with vegetable oil that is environment friendly. The variations of the magnetic field are south-south pole, north-north pole, south-north pole, north-south pole, and without. A drop of palm oil is placed on a type K thermocouple between two magnetic rods. The high-speed camera of 120 fps from the front recorded the flame from the start until it went out. The researcher found out the influence of various preheating in palm oil and the magnetic characteristics and behavior of the flame. The direction of the north-south magnetic field had a higher magnetic field strength, caused the droplet combustion to increases resulting in a wider flame but a lower and more stable height compared to other magnetic field directions. The speed of combustion affected by the magnetic field intensity which resulted the flow rate of O2, therefore the combustion speed happened quickly because between O2 and the fuel molecules easily react and were more flammable. The strength of the magnetic field increased oxygen concentration and fuel molecule around the reaction zone causing a short burning, resulting in a change delay time the shorter but the flame temperature increased. Stability, shape, temperature, height, delay time and combustion duration were highly valuable to design an efficient heat generator industry with the addition of magnet field. This study provides insight into the influence of magnetic field direction in magnetic field intensity on droplet combustion characteristics for boiler combustion in the power generation system

Influence of Magnetic Field Direction on Electrolyzer Efficiency and Bubble Behavior in Alkaline Water Electrolysis with Magnetic Field

Influence of Magnetic Field Direction on Electrolyzer Efficiency and Bubble Behavior in Alkaline Water Electrolysis with Magnetic Field

Stress and Strain Analysis in an Fe-Ga Alloy Single Crystal

We carried out in situ x-ray diffraction measurements of magnetostriction in an Fe-18at%Ga alloy single crystal under magnetic fields. The sample studied here was a Goss-oriented square plate (dimensions: 10 mm × 10 mm × 1 mm height) cutting from as-grown single crystal ingot produced by the Czochralski method. In-plain magnetic fields were applied with various directions in this study. The influence of magnetic field direction on the stress/strain states was precisely analyzed by using our original x-ray single crystal stress/strain measurement method. As a result, applied field angle dependence of tri-axial magnetostriction states was successfully obtained. Thereby, we found that the singular anisotropic mechanical properties of this material play an important role for its magnetostriction properties.

0803 磁性流体強制対熱伝達に及ぼす磁場印加方向の影響(OS8-1 機能性流体工学の融合化新展開,OS8 機能性流体工学の融合化新展開)

0803 磁性流体強制対熱伝達に及ぼす磁場印加方向の影響(OS8-1 機能性流体工学の融合化新展開,OS8 機能性流体工学の融合化新展開)

Influence of Magnetic Field Direction and Temperature on Rearrangement of Martensite Variants in Fe-31.2at.%Pd

We have measured temperature dependence of the uniaxial magnetocrystalline anisotropy constant Ku and the shear stress τr eq required for the twinning plane movement of an Fe-31.2Pd alloy in order to explain the field orientation dependence of rearrangement of martensite variants (RMV) of this alloy in the field-cooling process. Under the [001]P field (P represents parent phase), the RMV occurs perfectly at the temperatures where the measurement was performed; in this case, the magnetic shear stress acting across the twinning plane τmag, which is evaluated from Ku, becomes nearly twice as large as τr eq. On the other hand, under the [011]P field, the RMV occurs partially at all the measuring temperatures; in this case the maximum of τmag is nearly the same as τr eq. It is successful to evaluate the following relation quantitatively; τmag> τr eq is satisfied when RMV occurs under magnetic field.

Influence of field direction on magnetization measurement for NbTi wire

Upper critical field, μ0Hc2 was important to the type-II superconductors and interested to study for the nature of transition points near the upper critical field. A standard NbTi wire was used to explore the influence of magnetic field direction on magnetization measurement. The external field was applied in the direction of perpendicular or parallel to the sample axis. It swept up to 12 Tesla with the temperature changing from 4.2 K to 9.5 K in a Vibrating Sample Magnetometer (VSM) system. Upper critical fields such as μ0H irr(T) and μ0Hc2(T) were observed on the measured curves. These upper critical fields showed a linear relation dependent on temperatures. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Influence of Magnetic Field Direction on Rearrangement of Martensite Variants in an Fe-Pd Alloy

Influence of magnetic field direction on rearrangement of martensite variants in an Fe-31.2Pd(at%) single crystal has been investigated using thermal expansion measurement in a cooling process under the magnetic field applied along [001]P, [011]P and [111]P (‘‘P’’ represents ‘‘parent’’ phase). We also observe these rearrangements of variants in the cooling processes under the magnetic field applied along [001]P, [011]P and [111]P by optical microscope. From the thermal expansion measurement and the optical microscope observation, the following results are obtained: the variants are rearranged almost perfectly into the variants whose a axes are parallel to the magnetic field applied along [001]P, imperfectly into the variants whose c axis is perpendicular to the magnetic field applied along [011]P and hardly along [111]P. We explain these results considering the following criterion: rearrangement of variants proceeds when a kind of shear stress generated by applying a magnetic field acting on the twinning plane is larger than the stress required for the rearrangement of variants.