We propose a technique to measure the velocity of a bubble cloud based on the coda correlation. The method is founded on successive recordings of multiple scattered waves from a bubble cloud. Our model predicts the dependence between the correlation coefficient of these coda waves and the velocity of the bubble cloud under diffusion approximation. The Acoustic experiments are validated by simultaneous optical measurements in a water tank, with a good agreement between the acoustical and the optical methods (relative difference smaller than 7%). This technique can be transposed to any particle flow velocity problems involving multiple scattering effects in acoustics.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ultras.2019.03.005 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cavitation dynamics and thermodynamic effect of R134a refrigerant in a Venturi tube.
Ultrason Sonochem
January 2025
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China; MOE Key Laboratory of Cryogenic Technology and Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
Cavitation plays a crucial role in the reliability of components in refrigeration systems. The properties of refrigerants change significantly with temperature, thereby amplifying the impact of thermodynamic effects. This study, based on the Large Eddy Simulation (LES) method and the Schnerr-Sauer (S-S) cavitation model, investigates the transient cavitating flow characteristics of the R134a refrigerant in a Venturi tube (VT).
View Article and Find Full Text PDFLong-Range Anion Correlations Mediating Dynamic Anharmonicity and Contributing to Glassy Thermal Conductivity in Well-Ordered KAgSe.
Small
December 2024
Center for Advanced Materials Research, Beijing Normal University, Zhuhai, 519087, People's Republic of China.
Herein an extremely low (0.32‒0.25 WmK) and glassy temperature-dependence (300-600 K) of lattice thermal conductivity (κ) in a monoclinic KAgSe is reported.
View Article and Find Full Text PDFUsing space lidar to infer bubble cloud depth on a global scale.
Sci Rep
October 2024
Ocean Sciences Division, U.S. Naval Research Laboratory, NASA Stennis Space Center, John C. Stennis Space Center, MS, 39529, USA.
Visible and microwave satellite measurements can provide the global whitecap fraction. The bubble clouds are three-dimensional structures, and a space-based lidar can provide complementary observations of the bubble depth. Here, we use lidar measurements of the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite to quantify global bubble depth from the depolarization.
View Article and Find Full Text PDFEffect of Acoustically Responsive Droplet-based Low-intensity Histotripsy on Canine Prostate.
Ultrasound Med Biol
December 2024
Department of Ultrasound, The Second Affiliated Hospital of Army Medical University, Chongqing, China. Electronic address:
Objective: Low-intensity histotripsy (LIH) is a novel and safe technique for tissue ablation. This study aimed to explore the effects of LIH on canine prostate tissue and identify the degree of acute injury to the gland.
Methods: We constructed and evaluated two types of acoustically responsive droplet (ARD) emulsions using either perfluoropentane (PFP) with a lipid shell or perfluoromethyl-cyclopentane (PFMCP) with lauromacrogol (L) injection.
Development of an Injectable Hydrogel for Histotripsy Ablation Toward Future Glioblastoma Therapy Applications.
Ann Biomed Eng
December 2024
Virginia Tech - Wake Forest University School of Biomedical Engineering and Sciences, Blacksburg, VA, 24061, USA.
Glioblastoma (GBM) is the most common and malignant type of primary brain tumor. Even after surgery and chemoradiotherapy, residual GBM cells can infiltrate the healthy brain parenchyma to form secondary tumors. To mitigate GBM recurrence, we recently developed an injectable hydrogel that can be crosslinked in the resection cavity to attract, collect, and ablate residual GBM cells.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!