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Transverse plane

About: Transverse plane is a research topic. Over the lifetime, 17069 publications have been published within this topic receiving 194059 citations. The topic is also known as: axial plane.


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Journal ArticleDOI
TL;DR: In this paper, shear layers and wakes formed downstream of a splitter plate whose trailing edge has spanwise variations were briefly explored using the reacting flow visualization technique, showing that the global structure of the shear layer quickly forgets the initial perturbations, while the wake remembers them.
Abstract: Shear layers and wakes formed downstream of a splitter plate whose trailing edge has spanwise variations were briefly explored using the reacting flow visualization technique. A fundamental difference in behavior was observed between the two types of flows. The shear layer (which has only one sign of mean vorticity) rapidly forms its characteristic two‐dimensional vortex structures, whereas, in contrast, the wake (which has both signs of mean vorticity) forms closed vortex loops. These loops do not grow appreciably in the spanwise direction over the test section length, even though the transverse growth is comparable to the two‐dimensional wake behavior. The global structure of the shear layer quickly forgets the initial perturbations, while the wake remembers them. The results strongly suggest that the presence of only one or both signs of mean vorticity in these plane turbulent flows has a fundamental bearing on the spanwise structure and stability of the vorticity field.

54 citations

Journal ArticleDOI
TL;DR: In this article, the spectral finite-difference time-domain (FDTD) method was used to calculate the reflection coefficients and impedances of a corrugated dielectric-lined surface and a mushroom-like EBG.
Abstract: A periodic ground plane may be built to either stop the propagation of wave or support a quasi transverse electromagnetic wave along the surface. The former is called a soft surface, and the latter is a hard surface. However, a soft or a hard surface can only be realized in certain frequency and wavenumber regions; therefore, it is important to identify the bandwidth for the surface so that it can be used efficiently. The bandwidth for soft and hard operations of a ground plane has been previously characterized by studying the reflection of normal and oblique plane waves with the real angle of incidence. The bandwidth for soft and hard operations of a periodic ground plane is defined as a wavenumber-frequency region in which the complex value of reflection coefficient is inside a circle with the radius of 1//spl radic/2 and centered at -1 or 1 for soft or hard operation, respectively. This definition gives a unified approach to characterize the bandwidth in both the visible (k/sub x//sup 2/+k/sub y//sup 2/ k/sub 0//sup 2/) regions. The paper uses a newly developed numerical technique referred to as the spectral finite-difference time-domain (FDTD) method, which is capable of calculating the reflection coefficient and impedance of the surface for any given set of wavenumber and frequency of the incident wave including the surface wave region. By using this method, the reflection coefficients and impedances of a corrugated dielectric-lined surface and a mushroom-like EBG are calculated, and the bandwidth for soft, hard, and perfect magnetic conductor like behavior are specified.

54 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the properties of propagating kink waves in solar waveguides including the effects of both longitudinal and transverse plasma inhomogeneity and found that the wavelength is only dependent on the longitudinal stratification and the amplitude is simply a product of the two effects.
Abstract: It has been shown that resonant absorption is a robust physical mechanism for explaining the observed damping of magnetohydrodynamic kink waves in the solar atmosphere due to naturally occurring plasma inhomogeneity in the direction transverse to the direction of the magnetic field. Theoretical studies of this damping mechanism were greatly inspired by the first observations of post-flare standing kink modes in coronal loops using the Transition Region and Coronal Explorer. More recently, these studies have been extended to explain the attenuation of propagating coronal kink waves observed by the Coronal Multi-Channel Polarimeter. In the present study, for the first time we investigate the properties of propagating kink waves in solar waveguides including the effects of both longitudinal and transverse plasma inhomogeneity. Importantly, it is found that the wavelength is only dependent on the longitudinal stratification and the amplitude is simply a product of the two effects. In light of these results the advancement of solar atmospheric magnetoseismology by exploiting high spatial/temporal resolution observations of propagating kink waves in magnetic waveguides to determine the length scales of the plasma inhomogeneity along and transverse to the direction of the magnetic field is discussed.

54 citations

Journal ArticleDOI
TL;DR: In this paper, the transverse susceptibility of arrays of self-assembled Fe nanoparticles has been studied using a sensitive radio-frequency resonant technique, where broad peaks in the TS data are observed below the blocking temperature as the applied field is swept from positive to negative saturation.
Abstract: The transverse susceptibility (TS) of arrays of self-assembled Fe nanoparticles has been studied using a sensitive radio-frequency resonant technique. Symmetrically located broad peaks in the TS data are observed below the blocking temperature as the applied field is swept from positive to negative saturation. These peaks occur at the effective anisotropy fields $(\ifmmode\pm\else\textpm\fi{}{H}_{K})$ with the peak width determined by the distribution in ${H}_{K}$ in the nanoparticle array system. These features are observed to be strongly affected by dipolar interactions as well as thermal relaxation. Systematically tracking the evolution of the TS curves across the superparamagnetic transition reveals distinct temperature ranges over which thermal activation and dipolar energy overcome the effective magnetic anisotropy energy. Hysteresis loops measured using a superconducting quantum interference device magnetometer indicate a smaller coercive field for in-plane field orientation compared to that for out-of-plane orientation. This is also reflected in the TS measurements. A comparison of the TS over a wide range in temperature and magnetic fields, applied in plane and out of plane, reveals the distinct influence of variation in dipolar interaction strengths for the two geometries.

53 citations

Journal ArticleDOI
TL;DR: In this article, the transverse resistivity was measured in a reconnecting current sheet where the mean free path for the Coulomb collision is smaller than the thickness of the sheet.
Abstract: Measurement of the transverse resistivity was carried out in a reconnecting current sheet where the mean free path for the Coulomb collision is smaller than the thickness of the sheet. In a collisional neutral sheet without a guide field, the transverse resistivity is directly related to the reconnection rate. A remarkable agreement is found between the measured resistivity and the classical value derived by Spitzer. In his calculation the transverse resistivity for the electrons is higher than the parallel resistivity by a factor of 1.96. The measured values have verified this theory to within 30% errors.

53 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,178
20222,308
2021385
2020597
2019709
2018654