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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.
This article was published in the following journal.
Flow batteries using suspension electrodes, e.g. zincair flow batteries (ZAB), have recently gained renewed interest as potential candidates for grid energy storage or mobile applications. The perform...
Light scattering from small particles exhibit unique angular scattering distributions, which are strongly dependent on the radius to wavelength ratio as well as the refractive index contrast between t...
We investigate the dependency of the magnitude of heat transfer in a convection cell as a function of its inclination by means of experiments and simulations. The study is performed with a working flu...
Arterial stiffness has predictive value for cardiovascular disease (CVD). Local artery stiffness can provide insight on CVD pathology and may be useful for diagnosis and prognosis. However, current me...
Breakdown of the quantum Hall effect (QHE) is commonly associated with an electric field approaching the inter-Landau-level (LL) Zener field, the ratio of the Landau gap and the cyclotron radius. Elud...
The purpose of our study is to validate the accuracy of 4D PC flow method in quantification of thoracic and upper abdominal blood flow volumes in children. In this validation study, 4D PC ...
Recent studies have shown that applying intermittent negative pressure (INP) with short negative pressure (-40 mmHg) pulses to the lower extremities increase arterial blood flow velocity a...
60 pregnant women with singleton living fetus between 34 -38 wks gestation known to have severe hypertension in the current pregnancy were included. All participants underwent Doppler ult...
This study evaluates the impact of reducing sitting time and increasing exercise time on cardiometabolic health in persons with Multiple Sclerosis.
The purpose of this study is to investigate the safety and efficacy of an optical device designed and developed to quantitatively monitor blood flow velocity of wound sites. The hypothesi...
A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.
Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other).
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells.
Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.
Collaborations in biotechnology
Commercial and academic collaborations are used throughout the biotechnology and pharmaceutical sector to enhance research and product development. Collaborations can take the form of research and evaluation agreements, licensing, partnerships etc. ...