Vertical rotation effect on turbulence characteristics in an open channel flow

This paper solves the three-dimensional Navier-Stokes equation by a fractional-step method with the Reynolds number Reτ=194 and the rotation number Nτ=0-0.12. When Nτ is less than 0.06, the turbulence statistics relevant to the spanwise velocity fluctuation are enhanced, but other statistics are suppressed. When Nτ is larger than 0.06, all the turbulence statistics decrease significantly. Reynolds stress budgets elucidate that turbulence kinetic energy in the vertical direction is transferred into the streamwise and spanwise directions. The flow structures exhibit that the bursting processes near the bottom wall are ejected toward the free surface. Evident change of near-surface streak structures of the velocity fluctuations are revealed.     

Cherenkov Radiation Generated by an Electron Bunch in a Rectangular Dielectric Waveguide Filled with a Transversely Isotropic Medium

Technical Physics - Dielectric waveguides are being intensively studied as accelerating structures excited by an electron bunch. Rectangular dielectric structures are used both to test the...     

Nondestructive Control of the Surface,Layers, and Charge Carrier Concentration on SiC Substrates and Structures

Technical Physics - Silicon carbide substrates and epitaxial structures are investigated by nondestructive contactless methods. Parameters of the disrupted surface layer and roughnesses are...     

A Lightweight Flexible Solar Cell Based on a Heteroepitaxial InGaP/GaAs Structure

Technical Physics - Problems arising in fabrication of lightweight flexible solar cells based on heteroepitaxial AIIIBV structures with substrate etching are discussed. Possible solutions are...     

Inhomogeneity of Structural and Dynamical Characteristics of Dusty Plasma in a Gas Discharge

Journal of Experimental and Theoretical Physics - Dusty plasma crystals are commonly considered as spatially homogeneous structures with equal values of their structural and thermodynamic...     

A Model of Indentation for a Functionally Graded Strip

Doklady Physics - When different elements of engineering structures are manufactured, functionally graded coatings are applied to provide them with desired properties. The determination of the...     

Control over the Magnetic Properties of Co/Pt-based Multilayered Periodical Structures

Technical Physics - The possibility of controlling the magnetic properties of multilayered periodical structures with perpendicular magnetic anisotropy, which are based on cobalt and platinum...     

Multilayer Light-Emitting Diodes Based on Organic Semiconductor Polymers

Russian Physics Journal - Results of studying the optical and electrical characteristics of single- and two-layer polymer OLED structures with different thicknesses of radiating layers are...     

Collimation of Acoustic Radiation via Zero–Refraction–Index 2D Periodic Structures

Acoustical Physics - The experimental study results of acoustic radiation generation via zero–refraction–index periodic structures are presented. The frequency dependences of refraction...     

Methods for Switching Radiation Polarization in GaAs Laser Diodes

Technical Physics - Operation modes of laser structures with controlled polarization of light have been studied and the results of measuring polarization characteristics are presented. The...     

Excitons and Trions in Bilayer van der Waals Heterostructures

Physics of the Solid State - Excitons and trions in bilayer structures based on transition metal dichalcogenides are theoretically studied. Expressions for the effective potential of interparticle...     

Dynamic Destruction as Analogs of Critical Phenomena in Metal Samples with Various Geometries within a Wide Ranges of Amplitude–Time Characteristics of External Action

Physics of Atomic Nuclei - The quantitative characteristics of the products of dispersion and the cascade of dissipative structures arising in metals under shock-wave loading are determined. The...     

Quantum Spin Half Algebra and Generalized Megrelishvili Protocol for Confidentiality of Digital Images

International Journal of Theoretical Physics - Most of the enciphering structures are based on the transformation of mediums by describing the strict criteria. The presented article is based on...     

Luminescent Properties of Carbon Nanodots Bound to the Surface of Spherical Microresonator

Physics of the Solid State - Hybrid structures consisting of emitting carbon nanodots bound to the surface of monodisperse spherical silica particles, which function as microresonators, are...     

Effect of Electronic Correlations on the Electronic Structures of the FeAlO3 and FeSiO3 Compounds

Journal of Experimental and Theoretical Physics - The properties of FeAlO3 and FeSiO3 iron oxide compounds, which are present in the lower Earth mantle, are studied. The electronic structures of...     

Bragg Deflectors of Wave Fluxes for High-Power Relativistic Masers

Technical Physics - Quasi-optical Bragg structures that represent sections of planar waveguides with tilted (with respect to the beam propagation direction) corrugation are studied. It is shown...     

Optical Hilbert diagnostics of convective structures and phase transition in a horizontal layer of supercooled water

Technical Physics - Methods of Hilbert optics are used to visualize evolution of convective structures and wave front of crystallization in a horizontal layer of supercooled water bounded by...     

LED Structures Based on ZnO Films Obtained by RF Magnetron Sputtering for the UV Spectral Range

Technical Physics - Data for the influence of different defects on the photoluminescence and electroluminescence spectra (emission intensity and wavelength) of n-ZnO/p-GaN structures are reported.     

Giant piezoelectric effect in layered ferroelectric-polymer composites

Physics of the Solid State - The giant piezoelectric effect and giant piezoelectric relaxation are revealed for the first time in structures consisting of ferroelectric and polymer layers connected...     

Low-Frequency Noise in Light-Emitting Diodes Based on InGaN/GaN Quantum Wells under Electric Actions Accompanied with an Increase in the External Quantum Efficiency

Technical Physics - The results of testing the degradation of light-emitting diode structures with InGaN/GaN quantum wells are reported. An increase in the external quantum efficiency as compared...