Results 61 to 70 of about 19,313 (265)

Numerical Determination of the Secondary Acoustic Radiation Force on a Small Sphere in a Plane Standing Wave Field

Micromachines, 2019
Two numerical methods based on the Finite Element Method are presented for calculating the secondary acoustic radiation force between interacting spherical particles.
Gergely Simon, Marco A. B. Andrade, Marc P. Y. Desmulliez, Mathis O. Riehle, Anne L. Bernassau   +4 more
doaj   +1 more source

Linear and nonlinear modeling of self-excited acoustic oscillations in a T-shaped thermoacoustic engine

AIP Advances, 2021
Branch tubes are often used in thermoacoustic engines (TAEs) for acoustic power extraction or acoustic field adjustment. Their roles, although critical for the performance of the thermoacoustic system, are not fully understood yet. To address this issue,
Geng Chen, Haitian Hao, Aidong Deng
doaj   +1 more source

Producing acoustic frozen waves: simulated experiments [PDF]

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013
Latex source file (IEEE-style). Ten pages, with 15 Figures. Replaced with extended improvements.
Prego, Jose' L., Zamboni-Rached, Michel, Recami, Erasmo, Hernandez-Figueroa, Hugo E.   +3 more
openaire   +3 more sources

Vacuum Formed Spherical Triboelectric Architecture Overcoming Direction Constraints for 3D‐Omnidirectional Ultrasonic Energy Receiving

Advanced Functional Materials, EarlyView.
First vacuum formed spherical triboelectric converter for 3D‐omnidirectional ultrasonic energy receiving, with configurable DC or pulse outputs for versatile applications. ABSTRACT Ultrasound‐driven triboelectric nanogenerators (UD‐TENGs) have emerged as promising ultrasonic energy converters for underwater and biomedical applications.
Yanqin Huang, Mengjie Qin, Zixuan He, Xu Yang, Wenjie Chen, Siya Zhou, Qiyuan Zhang, Zhangwei Wang, Yicheng Wang, Yonghong Cheng, Daniel M. Mulvihill, Sandy Cochran, Qingshen Jing   +12 more
wiley   +1 more source

Seafloor Topographic Data Processing in Near-Seafloor Acoustic Field Simulation

Acoustics
Near-seafloor acoustic field characteristics are essential prior knowledge for near-seafloor underwater acoustic engineering. Scholte waves are a crucial component of the near-seafloor acoustic fields.
Siyu Ma, Yuxiang Zhang, Zhinan Xie, Jun Li   +3 more
doaj   +1 more source

Modified Green's Functions for Shallow Water Acoustic Wave Propagation

, 2004
This article presents an assessment of alternative forms of the Green’s function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-
Santiago, J A F S, Wrobel, L C
core   +1 more source

VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]

, 2002
The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E., del Pozo, C., del Pozo, C. F., Del-Pozo, Carlos, Williams, P., Williams, P. J. S.   +5 more
core   +1 more source

Blood Biomarkers and Surface‐Enhanced Raman Spectroscopy for Gout: A Comprehensive Review

Advanced Functional Materials, EarlyView.
Schematic illustrating gout disease progression from asymptomatic hyperuricemia to chronic tophaceous disease, highlighting the limitations of conventional imaging and biochemical diagnostics and the potential of engineered SERS platforms for ultrasensitive blood‐based detection of urate‐related biomarkers across disease stages, with the color gradient
Isuri Perera, Chiranjeevi Kanike, Appurva Tiwari, Hongyan Wu, Larry D. Unsworth, Ben Bin Xu, Xuehua Zhang   +6 more
wiley   +1 more source

Comparison of Higher-Order Numerical Schemes and Several Filtering Methods Applied to Navier-Stokes Equations with Applications to Computational Aeroacoustics

Journal of Algorithms & Computational Technology, 2009
In computational acoustics, fluid-acoustic coupling methods for the computation of sound have been widely used by researchers for the last five decades.
L.S. Lai, G.S. Djambazov, C.-H. Lai, K.A. Pericleous   +3 more
doaj   +1 more source

Sound radiation in turbulent channel flows [PDF]

, 2003
Lighthill’s acoustic analogy is formulated for turbulent channel flow with pressure as the acoustic variable, and integrated over the channel width to produce a two-dimensional inhomogeneous wave equation.
Morfey, Christopher L., Hu, Zhiwei, Sandham, Neil D.   +2 more
core   +1 more source