Results 21 to 30 of about 4,355 (266)

Vortex shedding in a model of superflow [PDF]

Physica D: Nonlinear Phenomena, 1999
The present article represents part of the PhD. dissertation by C. Josserand. We discuss the nucleation of quantized vortices in the nonlinear Schrödinger equation (NLS) for a flow around a disk in two spatial dimensions. It appears that the vortices are nucleated when the flow becomes locally (at the edge of the disk) supersonic.
Josserand, C., Pomeau, Y., Rica, S.
openaire   +3 more sources

Aeolian tone radiated from a circular cylinder with solid spiral fin in cross flow

Journal of Fluid Science and Technology, 2014
This study focuses on the characteristics of the Aeolian tone and Karman vortex shedding from a circular cylinder with a solid spiral fin. The fin pitch ratios range from 0.11 to 0.80.
Hiromitsu HAMAKAWA, Takaaki ADACHI, Hiroki MATSUOKA, Kazuki HOSOKAI, Eiichi NISHIDA, Eru KURIHARA, Hidechito HAYASHI   +6 more
doaj   +1 more source

Flow visualization observation of the interference vortex flow from a pair of square cylinders

Journal of Fluid Science and Technology, 2023
In order to investigate the aspect of the mutual interference flow from two square cylinders, the visual water-flow observation experiment was performed. In the experiment, the pitch ratio L/d and the arrangement angle α were made into the parameter, and
Yoshifumi YOKOI
doaj   +1 more source

Insights into Vortex Shedding with Data Analysis

Journal of Fluid Science and Technology, 2009
Unsteady, three-dimensional characteristics of vortex shedding were studied with self-made MEMS sensors situated spanwisely on a circular cylinder subjected to uniform incoming flow. Firstly, verification on the reliability of the MEMS sensor signals was
Jiun-Jih MIAU, J. K. TU, T. W. LIAO
doaj   +1 more source

The essence of generating vortex-within-a-vortex structures behind forked caudal fins

AIP Advances, 2022
This work focuses on vortex-within-a-vortex (VV) structures behind three different shapes of forked caudal fin with a heaving-pitching motion. The results show that the synchronization of trailing-edge vortex separation and the shedding of the leading ...
Zhongying Xiong
doaj   +1 more source

Research on the Unsteady Flow and Vortex Characteristics of Cavitation at the Tongue in Centrifugal Pump [PDF]

Journal of Applied Fluid Mechanics
In order to study the unsteady flow and vortex characteristics of tongue cavitation, numerical calculation is carried out for the whole flow channel given different conditions. Then, the calculation results are verified experimentally.
Z. Y. Luo, Y. Feng, X. Y. Sun, Y. Gong, J. X. Lu, X. W. Zhang   +5 more
doaj   +1 more source

Effects of swirl numbers on the unsteady characteristics of pilot flame in a triple-swirler staged combustor

Case Studies in Thermal Engineering, 2023
This paper studies the effects of the inner and outer pilot swirlers on the flame structures and thermo-acoustic instabilities in the triple-swirler staged combustors under various inner and outer pilot swirl numbers.
Tao Zhou, Kai Zhao, Feng Li, Kefu Wang, Nan Meng, Duo Wang   +5 more
doaj   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Investigation on mechanism of flow induced vibration of spiral tube bundle in cross lead bismuth flow

He jishu, 2021
BackgroundThe flow induced vibration of spiral tube bundle widely exists engineering practice. The traditional fluid medium is water and air, whilst lead bismuth fluid has gradually become a new heat exchange medium in recent years.PurposeThis study aims
WANG Zhengyang, QU Yegao, YU Xiaofei, CHEN Guo, HUANG Xuan, PENG Zhike   +5 more
doaj   +1 more source

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source