Relevant bibliographies by topics / Particles Acoustic properties

Academic literature on the topic 'Particles Acoustic properties'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Particles Acoustic properties"

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Tudor, Eugenia Mariana, Lubos Kristak, Marius Catalin Barbu, Tomáš Gergeľ, Miroslav Němec, Günther Kain, and Roman Réh. "Acoustic Properties of Larch Bark Panels." Forests 12, no. 7 (July 7, 2021): 887. http://dx.doi.org/10.3390/f12070887.

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The potential of tree bark, a by-product of the woodworking industry, has been studied for more than seven decades. Bark, as a sustainable raw material, can replace wood or other resources in numerous applications in construction. In this study, the acoustic properties of bark-based panels were analyzed. The roles of the particle size (4–11 mm and 10–30 mm), particle orientation (parallel and perpendicular) and density (350–700 kg/m3) of samples with 30 mm and 60 mm thicknesses were studied at frequencies ranging from 50 to 6400 Hz. Bark-based boards with fine-grained particles have been shown to be better in terms of sound absorption coefficient values compared with coarse-grained particles. Bark composites mixed with popcorn bonded with UF did not return the expected results, and it is not possible to recommend this solution. The best density of bark boards to obtain the best sound absorption coefficients is about 350 kg/m3. These lightweight panels achieved better sound-absorbing properties (especially at lower frequencies) at higher thicknesses. The noise reduction coefficient of 0.5 obtained a sample with fine particles with a parallel orientation and a density of around 360 kg/m3.
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Guevara Vasquez, Fernando, and China Mauck. "Periodic particle arrangements using standing acoustic waves." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475, no. 2232 (December 2019): 20190574. http://dx.doi.org/10.1098/rspa.2019.0574.

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We determine crystal-like materials that can be fabricated by using a standing acoustic wave to arrange small particles in a non-viscous liquid resin, which is cured afterwards to keep the particles in the desired locations. For identical spherical particles with the same physical properties and small compared to the wavelength, the locations where the particles are trapped correspond to the minima of an acoustic radiation potential which describes the net forces that a particle is subject to. We show that the global minima of spatially periodic acoustic radiation potentials can be predicted by the eigenspace of a small real symmetric matrix corresponding to its smallest eigenvalue. We relate symmetries of this eigenspace to particle arrangements composed of points, lines or planes. Since waves are used to generate the particle arrangements, the arrangement’s periodicity is limited to certain Bravais lattice classes that we enumerate in two and three dimensions.
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Sun, Zhi Xing, and Zhi Gang Shen. "Acoustic Properties of Loose and Consolidated Nonmetal Particles from Waste Printed Circuit Boards." Advanced Materials Research 873 (December 2013): 723–32. http://dx.doi.org/10.4028/www.scientific.net/amr.873.723.

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The aim of this study was to present a new method for resource utilization of nonmetal particles from waste printed circuit boards. Acoustic properties of loose particle mixes and their consolidated composites were investigated. Scanning electron microscopy (SEM) observation shows that the nonmetal particles exhibit high irregular shapes and forms an extensive network of micro-pores in the consolidated composites. The acoustic absorbers made from the nonmetal particles exhibit excellent sound absorption ability in broadband frequency ranges. When the particle size is larger than 0.3 mm, the average absorption coefficients are 0.79 and 0.74 for the loose and consolidated materials in the frequency range from 100 to 6,400 Hz. It was found that the consolidation process did not significantly affect the absorption performance when the particle size is larger than 0.15 mm. All the results show that the reuse of nonmetal particles from WPCB as sound absorbing materials represents a promising way for waste recycling and can also resolve both the environment pollution and the noise pollution problems.
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Wu, Hang, Zifan Tang, Rui You, Shuting Pan, Wenpeng Liu, Hongxiang Zhang, Tiechuan Li, et al. "Manipulations of micro/nanoparticles using gigahertz acoustic streaming tweezers." Nanotechnology and Precision Engineering 5, no. 2 (June 1, 2022): 023001. http://dx.doi.org/10.1063/10.0009954.

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Contactless acoustic manipulation of micro/nanoscale particles has attracted considerable attention owing to its near independence of the physical and chemical properties of the targets, making it universally applicable to almost all biological systems. Thin-film bulk acoustic wave (BAW) resonators operating at gigahertz (GHz) frequencies have been demonstrated to generate localized high-speed microvortices through acoustic streaming effects. Benefitting from the strong drag forces of the high-speed vortices, BAW-enabled GHz acoustic streaming tweezers (AST) have been applied to the trapping and enrichment of particles ranging in size from micrometers to less than 100 nm. However, the behavior of particles in such 3D microvortex systems is still largely unknown. In this work, the particle behavior (trapping, enrichment, and separation) in GHz AST is studied by theoretical analyses, 3D simulations, and microparticle tracking experiments. It is found that the particle motion in the vortices is determined mainly by the balance between the acoustic streaming drag force and the acoustic radiation force. This work can provide basic design principles for AST-based lab-on-a-chip systems for a variety of applications.
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Alishiri, Mehdi, Amir Hooman Hemmasi, Habibollah Khademi Eslam, Sedigheh Basirjafari, and Mohammad Talaeipour. "Evaluation and comparison the properties of acoustic boards made of date palm fiber." BioResources 16, no. 4 (September 30, 2021): 7702–15. http://dx.doi.org/10.15376/biores.16.4.7702-7715.

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Applying acoustic panels made of natural fibers, due to their high biodegradable characteristics, light weight, low density, cheap price and non-toxicity, are proper alternatives to acoustic absorbers made of synthetic fibers. Considering their stance and vast applicability in industry, the possibility of producing them of natural palm fibers with sodium silicate adhesive of 10 and 20% in two 16 and 32 mm thicknesses, 350 and 450 kg/m3 densities, 50 and 100 mm particles length (strands), as variable factors in 16 types of matched panels with 3 repetitions is proposed in this article. The palm-trunk discs constituted the control sample. The effect of variables on sound absorption coefficient was assessed. The effect of variable thickness and adhesive percentage on all frequencies was significant and the effect of density variable on all frequencies except 250 and 2000 Hz was also significant. The effect of particle length was significant except at the 500 Hz frequency. The effects of all variables on porosity were significant. The results of this study suggest that by applying date palm-trunk (an agricultural waste) combined with sodium silicate adhesive, industrial environment-friendly panels can be produced with proper sound absorption coefficient in the field of acoustics. This 32-mm-thick panel was composed of 80% date palm-trunk particles of 50 mm length, 450 kg/m3 density, and 20% sodium silicate adhesive.
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Ferrandez-García, Maria Teresa, Antonio Ferrandez-Garcia, Teresa Garcia-Ortuño, Clara Eugenia Ferrandez-Garcia, and Manuel Ferrandez-Villena. "Assessment of the Physical, Mechanical and Acoustic Properties of Arundo donax L. Biomass in Low Pressure and Temperature Particleboards." Polymers 12, no. 6 (June 17, 2020): 1361. http://dx.doi.org/10.3390/polym12061361.

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Traditionally, plant fibres have been used as a raw material for manufacturing construction materials; however, in the last century, they have been replaced by new mineral and synthetic materials with manufacturing processes that consume a large amount of energy. The objective of this study was to determine the mechanical, physical and acoustic properties of panels made from giant reed residues. The article focuses on evaluating the acoustic absorption of the boards for use in buildings. The materials used were reed particles and urea–formaldehyde was used as an adhesive. The panels were produced with three particle sizes and the influence that this parameter had on the properties of the board was evaluated. To determine the absorption coefficient, samples were tested at frequencies ranging from 50 to 6300 Hz. The results showed that the boards had a medium absorption coefficient for the low and high frequency range, with significant differences depending on the particle size. The boards with 2–4 mm particles could be classified as Class D sound absorbers, while boards with particle sizes of 0.25–1 mm showed the greatest sound transmission loss. Unlike the acoustic properties, the smaller the particle size used, the better the mechanical properties of the boards. The results showed that this may be an appropriate sound insulation material for commercial use.
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Ahmad, Mansoor, Ayhan Bozkurt, and Omid Farhanieh. "Evaluation of acoustic-based particle separation methods." World Journal of Engineering 16, no. 6 (December 2, 2019): 823–38. http://dx.doi.org/10.1108/wje-06-2019-0167.

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Purpose This paper aims to Separation and sorting of biological cells is desirable in many applications for analyzing cell properties, such as disease diagnostics, drugs delivery, chemical processing and therapeutics. Design/methodology/approach Acoustic energy-based bioparticle separation is a simple, viable, bio-compatible and contact-less technique using, which can separate the bioparticles based on their density and size, with-out labeling the sample particles. Findings Conventionally available bioparticle separation techniques as fluorescence and immunomagnetic may cause a serious threat to the life of the cells due to various compatibility issues. Moreover, they also require an extra pre-processing labeling step. Contrarily, label-free separation can be considered as an alternative solution to the traditional bio-particle separation methods, due to their simpler operating principles and lower cost constraints. Acoustic based particle separation methods have captured a lot of attention among the other reported label-free particle separation techniques because of the numerous advantages it offers. Practical implications This study tries to briefly cover the developments of different acoustic-based particle separation techniques over the years. Unlike the conventional surveys on general bioparticles separation, this study is focused particularly on the acoustic-based particle separation. The study would provide a comprehensive guide for the future researchers especially working in the field of the acoustics, in studying and designing the acoustic-based particle separation techniques. Originality/value The study insights a brief theory of different types of acoustic waves and their interaction with the bioparticles is considered, followed by acoustic-based particle separation devices reported till the date. The integration of acoustic-based separation techniques with other methods and with each other is also discussed. Finally, all major aspects like the approach, and productivity, etc., of the adopted acoustic particle separation methods are sketched in this article.
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Yang, Jian, and Hejuan Chen. "A novel method of studying the micro-contact using surface acoustic wave sensor." Sensor Review 36, no. 4 (September 19, 2016): 421–28. http://dx.doi.org/10.1108/sr-10-2015-0162.

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Purpose This paper aims to investigate the response behavior of the surface acoustic wave (SAW) sensor under the loading of micro-particles and to evaluate the feasibility of using the SAW sensor to study the micro-contact of the particle–plane interface. Design/methodology/approach An analytical perturbation theory of the coupled system of particle and SAW is presented. It shows that in the weak-coupling regime, the SAW sensor detects the coupling stiffness rather than the additional mass of the particle at the interface. The frequency perturbation formula expressed in parameters of the geometry and mechanical properties of the contact is further derived. The frequency shift of a 262-MHz Rayleigh-type SAW in the oscillation configuration under the loading of multiple starch particles of different sizes has been measured. Findings The experiment results of a linear relationship between the frequency increase and the sum of the radius of particles to the power of 2/3 verified the validity of the theory of linking the SAW response to the geometry and mechanical properties of the contact. Originality/value The SAW sensor could serve as a new candidate for studying the details of mechanical properties of the micro-contact of the interface.
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Józefczak, Arkadiusz, Tomasz Hornowski, Anita Król, Matúš Molčan, Błażej Leszczyński, and Milan Timko. "The Effect of Sonication on Acoustic Properties of Biogenic Ferroparticle Suspension." Archives of Acoustics 41, no. 1 (March 1, 2016): 161–68. http://dx.doi.org/10.1515/aoa-2016-0016.

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Abstract Superparamagnetic iron oxide nanoparticles (SPION) synthesised chemically usually need the modification of the particle surface. Other natural sources of magnetic particles are various magnetotactic bacteria. Magnetosomes isolated from magnetotactic bacteria are organelles consisting of magnetite (Fe3O4) or greigite (Fe3S4) crystals enclosed by a biological membrane. Magnetotactic bacteria produce their magnetic particles in chains. The process of isolation of magnetosome chains from the body of bacteria consists of a series of cycles of centrifugation and magnetic decantation. Using a high-energy ultrasound it is possible to break the magnetosome chains into individual nanoparticles – magnetosomes. This study presents the effect of sonication of magnetosome suspension on their acoustic properties, that is speed and attenuation of the sound. Acoustic propagation parameters are measured using ultrasonic spectroscopy based on FFT spectral analysis of the received pulses. The speed and attenuation of ultrasonic waves in magnetosome suspensions are analysed as a function of frequency, temperature, magnetic field intensity, and the angle between the direction of the wave and the direction of the field.
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Tavossi, H., and B. R. Tittmann. "Acoustic properties of porous model media of spherical particles." Journal of the Acoustical Society of America 99, no. 4 (April 1996): 2487–500. http://dx.doi.org/10.1121/1.415599.

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Dissertations / Theses on the topic "Particles Acoustic properties"

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Alam, MB Mahbub. "Acoustic wave propagation through a random dispersion of solid particles in a viscous fluid." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMLH15/document.

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La propagation d’une onde ultrasonore de compression au travers d’une distribution de particules solides identiques localisées aléatoirement dans un liquide visqueux est étudiée. La longueur d’onde de l’onde de compression est supposée grande devant le rayon des particules, et les propriétés effectives dynamiques du milieu sont recherchées.Les coefficients de diffusion d’une sphère solide isolée sont étudiés pour différentes polarisations des ondes partielles de mode n incidentes et diffusées. Des expressions approchées en sont données pour tout n dans le régime de diffusion de Rayleigh.Dans le cas de particules sphériques, le milieu est modélisé par un noyau élastique, de même matériau et rayon que les particules, et entouré d’une coque emplie du fluide hôte. L’ensemble est insoné, dans le milieu effectif, par une onde de compression partielle de mode n. Les propriétés effectives sont recherchées par minimisation de la diffusion pour différentes valeurs de n. Le module d’élasticité volumique effectif et la masse volumique effective sont obtenus respectivement à partir des modes n=0 et n=1. Comparée à la formule d’Ament, fondée sur l’équilibre des forces hydrodynamiques et inertielle au niveau de chaque particule supposée rigide, celle obtenue ici fait apparaître un effet de la concentration sur la dépendance fréquentielle de la masse volumique similaire à celui observé, expérimentalement et dans des modèles de diffusion multiple, sur les propriétés effectives des ondes de compression. La méthode d’Ament est ensuite appliquée pour obtenir la masse volumique effective dans le cas de sphéroïdes rigides alignés
A random dispersion of identical elastic solid particles in a viscous fluid is considered and effective properties, appropriate to the propagation through the medium of an ultrasonic compressional wave of large wavelength compared to the radius of the particles, is investigated.The scattering coefficients of a single spherical particle in a viscous medium are investigated for all combinations of incident and scattered wave types for use in multiple scattering models. Approximate formulae are obtained for the coefficients at n’th partial wave order in the Rayleigh limit. For spherical particles, a core-shell self-consistent model is used, in which the medium is modelled by an elastic core of the same material and radius as the particles, surrounded by a shell of the host fluid, and placed in the effective medium. The radius of the shell is such that the ratio of the core/shell volume is equal to the particle concentration. The dynamic properties of the effective medium are sought by minimising the scattering of the shell for different incident compressional partial wave orders (n).The effective bulk modulus is found from the monopole mode n=0 and the effective mass density from the dipole mode n=1. When compared to Ament’s formula based on local force balance at the particles (assumed rigid), the effective mass density obtained from the core-shell model shows a frequency-dependent effect of concentration similar to that observed in multiple scattering models and experimentally. Ament’s method is then applied to obtain the effective mass density in case of aligned rigid spheroids
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Glé, P., E. Gourdon, L. Arnaud, Kirill V. Horoshenkov, and Amir Khan. "The effect of particle shape and size distribution on the acoustical properties of mixtures of hemp particles." 2013. http://hdl.handle.net/10454/9656.

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Hemp concrete is an attractive alternative to traditional materials used in building construction. It has a very low environmental impact, and it is characterized by high thermal insulation. Hemp aggregate particles are parallelepiped in shape and can be organized in a plurality of ways to create a considerable proportion of open pores with a complex connectivity pattern, the acoustical properties of which have never been examined systematically. Therefore this paper is focused on the fundamental understanding of the relations between the particle shape and size distribution, pore size distribution, and the acoustical properties of the resultant porous material mixture. The sound absorption and the transmission loss of various hemp aggregates is characterized using laboratory experiments and three theoretical models. These models are used to relate the particle size distribution to the pore size distribution. It is shown that the shape of particles and particle size control the pore size distribution and tortuosity in shiv. These properties in turn relate directly to the observed acoustical behavior.
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Books on the topic "Particles Acoustic properties"

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Winter School on Wave and Quantum Acoustics (34th 2005 Ustroń, Poland). 34th Winter School on Wave and Quantum Acoustics: Ustroń, Poland, 28 February-4 March, 2005. Les Ulis, France: EDP Sciences, 2005.

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Book chapters on the topic "Particles Acoustic properties"

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Rutkowski, M. "Influence of Underpressure on Acoustic Properties of Semi-intelligent Vacuum Packed Particles." In Mechatronics 2013, 127–33. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02294-9_17.

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Garrett, Steven L. "Nonlinear Acoustics." In Understanding Acoustics, 701–53. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_15.

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Abstract A fundamental assumption of linear acoustics is that the presence of a wave does not have an influence on the properties of the medium through which it propagates. By extension, the assumption of linearity also means that a waveform is stable since any individual wave does not interact with itself. Small modifications in the sound speed due to wave-induced fluid convection (particle velocity) and to the wave’s effect on sound speed through the equation of state can lead to effects that could not be predicted within the limitations imposed by the assumption of linearity. Although a wave’s influence on the propagation speed may be small, those effects are cumulative and create distortion that can produce shocks. These are nonlinear effects because the magnitude of the nonlinearity’s influence is related to the square of an individual wave’s amplitude (self-interaction) or the product of the amplitudes of two interacting waves (intermodulation distortion). In addition, the time-average of an acoustically induced disturbance may not be zero. Sound waves can exert forces that are sufficient to levitate solid objects against gravity. The stability of such levitation forces will also be examined along with their relation to resonance frequency shifts created by the position of the levitated object.
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Szczepanik, Mirosław, Arkadiusz Poteralski, Jacek Ptaszny, and Tadeusz Burczyński. "Hybrid Particle Swarm Optimizer and Its Application in Identification of Room Acoustic Properties." In Swarm and Evolutionary Computation, 386–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29353-5_45.

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Jyoti Dehingia, Hirak. "Various Aspects of Dust-Acoustic Solitary Waves (DAWs) in Inhomogeneous Plasmas." In Plasma Science - Recent Advances, New Perspectives and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.109160.

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Dusty plasma offers an extensive study of space and astrophysical environments. In this chapter, we have studied some of the basic properties of dusty plasmas, interaction of dust and plasma particles, and the effect of intramolecular attraction and repulsion between these plasma and dust grain particles. During these investigations, we have discussed a few basic relations of dusty plasma and the effect of dust particles on the nonlinear wave structures in dusty plasma. Here, we have also studied the various aspects of dust-acoustic solitary waves (DASWs) in inhomogeneous plasma. To study and analyze the various aspects of DAWs in inhomogeneous plasmas, the governing fluid equations of plasmas are considered to derive the Korteweg de-Vries (KdV) equation. The solution of the KdV equation is obtained as soliton or solitary wave. The solitary wave solution indicates the various characteristics of DASWs in the inhomogeneous dusty plasma. In this chapter, a systematic and extensive study on DAWs is also included for the inhomogeneous and unmagnetized plasmas.
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Newnham, Robert E. "Acoustic waves I." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0025.

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In this chapter we treat plane waves specified by a wave normal and a particle motion vector . Two types of waves, longitudinal waves and shear waves, are observed in solids. For low symmetry directions, there are generally three different waves with the same wave normal, a longitudinal wave and two shear waves. The particle motions in the three waves are perpendicular to one another. Only longitudinal waves are present in liquids because of their inability to support shear stresses. The transverse waves are strongly absorbed. Acoustic wave velocities (v) are controlled by elastic constants (c) and density (ρ). For a stiff ceramic (c ∼ 5 × 1011 N/m2) and density (ρ ∼ 5 g/cm3 = 5000 kg/m3), the wave velocity is about 104 m/s. For low frequency vibrations near 1 kHz the wavelength λ is about 10 m. The shortest wavelengths are around 1 nm and correspond to infrared vibrations of 1013 Hz. Acoustic wave velocities for polycrystalline alkali metals are plotted in Fig. 23.2. Longitudinal waves travel at about twice the speed of transverse shear waves since c11 > c44. Sound is transmitted faster in light metals like Li which have shorter, stronger bonds and lower density than heavy alkali atoms like Cs. The tensor relation between velocity and elastic constants is derived using Newton’s Laws and the differential volume element shown in Fig. 23.3(a). The volume is equal to (δZ1) (δZ2) (δZ3). Acoustic waves are characterized by regions of compression and rarefaction because of the periodic particle displacements associated with the wave. These displacements are caused by the inhomogeneous stresses emanating from the source of the sound. In tensor form the components of the stress gradient are ∂Xij/∂Zk and will include both tensile stress gradients and shear stress gradients, as pictured in Fig. 23.3(b). The force F acting on the volume element is calculated by multiplying the stress components by the area of the faces on which the force acts.
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BADILLO-ÁNGELES, Sergio, Zaira Betzabeth TREJO-TORRES, and Karla María VELÁZQUEZ-LUCHO. "Diseño y construcción de módulos de block no estructural incorporando el reciclaje de taparroscas." In Arquitectura y Sustentabilidad Handbook T-I, 35–45. ECORFAN-Mexico, S.C., 2021. http://dx.doi.org/10.35429/h.2021.14.1.35.45.

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The present research aims to report the design and construction of non-structural concrete blocks incorporating caps from polyethylene terephthalate (PET) bottles as a replacement material for granzón, since these caps can be incorporated if they are crushed or crushed into particles. smaller (approximately 1 cm), which will improve the block, giving it a different texture. Thanks to the properties of plastic, this alternative block may be lighter than the traditional block, considering it as a non-structural block, which can be implemented as dividing walls in the various constructions within the field of architecture. Given that it has a wide variety of applications, this would lead to reducing its production costs. On the other hand, it is very important to characterize the block and for this it is necessary to carry out thermal, acoustic and resistance tests. Regarding the latter, the compressive strength of the ecological block is one of the most important goals of the prototype since it must abide by the regulations stipulated by the MNX-C-441-ONNCCE-2013. In addition, plastic generates good thermal insulation, and its degradation time is estimated between 200 and 300 years, which guarantees a highly durable home over time.
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Conference papers on the topic "Particles Acoustic properties"

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Wang, Xiaojie, Caiping Wang, Honglang Zhu, and Jialu Geng. "Effect of the carbonyl iron particles on acoustic absorption properties of magnetic polyurethane foam." In Behavior and Mechanics of Multifunctional Materials and Composites XII, edited by Hani E. Naguib. SPIE, 2018. http://dx.doi.org/10.1117/12.2294518.

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Al Zaitone, Belal. "Drying kinetics of cellulose nanofibers suspensions." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7475.

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Cellulose nanofibers (CNF) is used in various pharmaceutical applications due to its unique characteristics i.e., biodegradability, mechanical and biological properties. CNF is often produced by spray drying process, knowledge of the drying kinetics in terms of mass and heat transfer on the scale of single droplet is important for process development and model validation. Acoustic levitator was used to study drying process of CNF suspension at different air temperatures and initial CNF concentrations. The unique property of acoustic levitation to hold single droplet contactless in the air, enables to study particle morphology during drying process, calculate evaporation rate and estimate particle porosity. Results show that packed particles result at lower initial concentration and temperature has a moderate influence on mean porosity of CNF dried particles. Keywords: acoustic levitation; droplet; drying kinetics; Cellulose Nanofibers
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Furlan, John M., Venkat Mundla, Jaikrishnan Kadambi, Nathaniel Hoyt, Robert Visintainer, and Greame Addie. "Localized Particle Concentration Measurement in Slurry Flows Using A-Scan Ultrasound Technique." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78051.

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In the design of slurry transport equipment, the effects of solid particle concentration on hydraulic performance and wear have to be considered. This study involves examining the acoustic properties of slurry flows such as velocity, backscatter and attenuation as a function of volume fraction of solid particles. Ultrasound A-mode imaging method is developed to obtain particle concentration in a flow of soda lime glass particles (diameter of 200 micron) and water slurry in a 1″ diameter pipe. Based on the acoustic properties of the slurry a technique is developed to measure local solid particle concentrations. The technique is used to obtain concentration profiles in homogeneous (vertical flow) and non-homogeneous (horizontal flow) slurry flows with solid particle concentrations ranging from 1–10% by volume. The algorithm developed utilizes the power spectrum and attenuation measurements obtained from the homogeneous loop as calibration data in order to obtain concentration profiles in other (i.e. non-homogenous) flow regimes. A computational study using FLUENT was performed and a comparison is made with the experimental results. A reasonable agreement between the experimental and computational results is observed.
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Liu, Zhongzheng, Han Wang, Arum Han, and Yong-Joe Kim. "Numerical modeling for analyzing microfluidic acoustophoretic motion of cells and particles with application to identification of vibro-acoustic properties." In ICA 2013 Montreal. ASA, 2013. http://dx.doi.org/10.1121/1.4799390.

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Lu, Lu, Shan Hu, and Yayue Pan. "3D Printed Particle-Polymer Composites With Acoustically Localized Particle Distribution for Thermal Management Applications." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6643.

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The particle-polymer composite can perform multiple functionalities according to particle property, local particle distribution, and alignment. This paper shows thermal management applications of in situ manipulations of particle dispersion patterns within a 3D printed polymeric composite architecture. A 3D printed particle-polymer composite with enhanced thermal conductive properties was developed. Composite structures containing 30-micron-sized aluminum particles embedded in the acrylate polymer were produced using a novel acoustic field assisted projection based Stereolithography process. Thermal properties of the pure polymer and prepared uniform composite with 2.75 wt% particle were characterized by using the transient hot bridge technique. To investigate the effect of material composition and particle distribution pattern on composite thermal behavior, heat sinks were designed and fabricated with the pure polymer, homogeneous composite with particles uniformly distributed in the polymer matrix, and composite with patterned particles for comparison. Infrared thermal imaging was performed on the 3D printed objects. The homogeneous composites displayed slight enhancement in thermal conductivity. A significant improvement of heat dissipation speed was observed for the patterned composite, due to a densely interconnected aluminum aggregate network. To further improve the thermal property of the patterned composite, varying layer thicknesses were tested. The developed patterned composites with superior performance compared to the inherent polymer material and homogeneous composites can be used for fabricating thermal management applications in electronic and fluidic devices.
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Ntimugura, Fabrice, Raffaele Vinai, Anna Harper, and Pete Walker. "Experimental Investigation on Mechanical and Acoustic Performance of Miscanthus - Lime Composites." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.12.

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The environmental burdens attributable to buildings remain relatively high. The built environment is responsible for more than one-third of the global energy consumption and nearly 40% of global CO2 emissions. In the context of increasing the sustainability of the built environment, bio-based building materials have gained a growing interest for their application in building envelopes. Miscanthus giganteus (elephant grass) is a perennial, cost effective and sustainable source of fibres for the development of bio-composites. This experimental study evaluates mechanical and acoustic properties of miscanthus - lime composites for their potential use in renovations and new-build houses, in South West England. The impact of binder to aggregate mass ratio and density on compressive strength is investigated. Moreover, the effect of aggregate particle size on the acoustic performance of miscanthus - lime composites is presented. It is shown that the initial fresh density has little effect on compressive strength compared with that of binder content. The acoustic tests results show that the use of small size particles improves the acoustic performance of miscanthus - lime composites with recorded high transmission loss and sound absorption coefficient values.
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7

Yang, N. H., and H. Nayeb-Hashemi. "The Effect of Solid Particle Erosion on the Mechanical Properties and Fatigue Life of Fiber-Reinforced Composites." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13491.

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The effect of solid particle erosion on the strength and fatigue properties of E-glass/epoxy composite was investigated. Solid particle erosion with SiC particles of 400 μm to 500 μm in diameter was simulated on 12 ply [45°/-45°/0°/45°/-45°/0°]s E-glass/epoxy composites with a constant particle velocity of 42.5 m/s and solid particle to air volume ratio of 6 kg/m3 at impact angles of 90°, 60°, and 30° for 30, 60, 90 and 120 seconds. Damaged and undamaged specimens were subjected to tensile tests while monitoring their acoustic emission (AE) activity. An erosion damage parameter was defined as a function of the particle impact angle and erosion duration to determine the residual tensile strength of the composite. Scanning electron microscope (SEM) images of the erosion damaged specimens revealed the same damage mechanism occurred at different impact angles. The AE stress delay parameter was used to predict the residual tensile strength of erosion damaged composites. Tension-tension fatigue tests were performed on virgin specimens and specimens exposed to erosion damage of 60 seconds and 90 seconds at 90° particle impact angle to observe the effects of erosion damage on the fatigue life. A modified Basquin's equation was defined to predict the fatigue life of the erosion damaged specimens.
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8

Zhu, Junjie, Tzuen-Rong Jeremy Tzeng, and Xiangchun Schwann Xuan. "Dielectrophoretic Separation of Microparticles in Curved Microchannels." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11885.

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Particle (both biological and synthetic) separation is important for a wide range of applications in industry, biology, and medicine. In microfluidic devices particles have been separated based on either extrinsic labels (e.g., fluorescence- and magnetic-activated sorting) or intrinsic properties (e.g., size, charge, density, etc.). The latter may take place in a batchwise or continuous-flow process. The batch-process separation typically includes filtration, chromatography, and electrophoresis. In the continuous-flow separation, an external force field (e.g., acoustic, electrical, magnetic, and optical, etc.) acts on particles at an angle to the flow direction and deflects them to different flow paths [1]. Here we introduce a continuous particle separation technique in electrokinetic flow through curved microchannels. This separation results from the cross-stream dielectrophoretic motion induced by channel curvatures [2]. It eliminates the use of in-channel micro-electrodes or micro-obstacles that are required in present dielectrophoresis-based particle separation techniques [3].
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9

Yang, N. H., and H. Nayeb-Hashemi. "Evaluation of Solid Particle Erosion Damage on E-Glass/Epoxy Composites Using Acoustic Emission Activity." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79278.

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Abstract:
The effect of solid particle erosion on the strength properties of E-glass/epoxy composite was investigated. Solid particle erosion with SiC particles 400 μm to 500 μm in diameter was simulated on 12 ply [45°/−45°/0°/45°/−45°/0°]s E-glass/epoxy composites with constant particle velocity of 42.5 m/s at impact angles of 90°, 60°, and 30° for 30, 60, 90 and 120 seconds. Damaged and undamaged specimens were subjected to tensile tests while monitoring their acoustic emission (AE) activity. An erosion damage parameter was defined as a function of the particle impact angle and erosion duration to determine the residual tensile strength of the composite. Scanning electron microscope (SEM) images of the erosion damaged specimens revealed the same damage mechanism occurred at different impact angles. The distribution of AE events by event duration, ring down counts and energy distribution were used to characterize the different damage mechanisms that occurred during tensile loading of damaged and undamaged specimens. The results showed AE activity could be used to distinguish between different damage mechanisms within the composite, such as fiber/matrix debonding, delamination and fiber fracture. The Weibull probability distribution model and the AE stress delay parameter model were developed to relate the AE activity to the erosion damage and residual strength. The results showed both the Weibull probability model and the stress delay model could be used to predict residual strength of the composites.
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10

Guerrero, M., N. Rüther, S. Haun, R. Szupiany, F. Latosinski, and S. Baranya. "Acoustic properties of sediment particles from water samples in large rivers: A comparison in the light of ADCP recordings application for suspended-load estimation." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-234.

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Reports on the topic "Particles Acoustic properties"

1

Boss, Emmanuel. Relating the Optical and Acoustical Properties of Oceanic Particles. Fort Belvoir, VA: Defense Technical Information Center, September 2011. http://dx.doi.org/10.21236/ada557173.

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