Cylindrical phononic crystals sense the physical and chemical properties of the transported liquid

Left panel: Tubular phononic crystals (TPC) with Fabry-Perot cavities filled with a series of propanol-water mixture: Solid (top) and liquid (bottom) sound field representations. Right panel: A sensor application for measuring propanol-water mixtures with molar ratios x in the range 0-59.6% as a function of measurement frequency (millimeter size). Credit: Yan Pennec

Phononic crystals are an innovative resonant platform for sensing and understanding the volumetric properties of liquids and are of increasing interest to researchers.

of Journal of Applied PhysicsResearchers in France and Germany have proposed the design of tubular phononic crystals (TPCs) for the purpose of sensing the biochemical and physical properties of the liquid that fills the hollow portion of the tube.

“Depending on its size, the device can be used in small, microfluidic applications, medium scale, syringe medicine, or large scale. civil engineering About gas routing in the pipeline. “

Phononic crystals are known for their ability to guide, control and manipulate acoustic and elastic waves. This ability to control the propagation of elastic waves has opened up a wide range of application areas, depending on the target frequency.

Researchers investigated structured TPCs by placing washers along the tubes on a regular basis. They demonstrated how a mixed solid-liquid system can present an absolute or polarization-dependent bandgap.

By introducing Fabry-Perot (FP) cavities into the periodic structure, researchers created peaks in the bandgap and dips in the passband of the transmission spectrum.

These peaks and dips have been shown to be sensitive to the speed of sound and sound velocity of the fluid flowing through the pipe, and more sensitive to changes in mass density than to the speed of sound. As a result, TPC becomes an innovative platform for sensing applications with a sufficiently strong coupling of FP modes at the fluid / solid interface.

Researchers will use a 3D printer to experimentally demonstrate the system and work on all physical parameters to make complete liquid decisions such as density, velocity, and viscosity. They introduce the thermoviscosity equation and compare the detected gas with the liquid.

The findings will influence the development of acoustic metasurfaces (AMMs) in liquids. So far, AMM has been developed primarily in the air. There is growing interest in applying the AMM concept to underwater applications.

The article “Tubular Phonic Crystal Sensor” by Abdellatif Gueddida, Yan Pennec, Victor Zhang, Frieder Lucklum, Michael J. Vellekoop, Nikolay Mukhin, Dr. Written by RalfLucklum, Bernard Bonello and Bahram Djafari-Rouhani.Articles will be displayed in Journal of Applied Physics September 14, 2021.

Researchers are developing an acoustic cylindrical shell for measuring the properties of liquids

For more information:
A. Gueddida et al, Tubular phononic crystal sensor, Journal of Applied Physics (2021). DOI: 10.1063 / 5.0051660

Quote: Cylindrical phononic crystals were obtained from on September 15, 2021 (September 2021). 14th) senses physical and chemical properties

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