Measurements of the acoustical properties of iron slag panels as porous media using scale models

2012 ◽  
Vol 132 (3) ◽  
pp. 2084-2084
Author(s):  
Ho Jun Kim ◽  
Hyung Suk Jang ◽  
Jin Yong Jeon
Keyword(s):  
Porous Media ◽  
Acoustical Properties ◽  
Iron Slag ◽  
Scale Models

A three-parameter analytical model for the acoustical properties of porous media

2019 ◽  
Vol 145 (4) ◽  
pp. 2512-2517 ◽  
Author(s):  
Kirill V. Horoshenkov ◽  
Alistair Hurrell ◽  
Jean-Philippe Groby
Keyword(s):  
Porous Media ◽  
Analytical Model ◽  
Acoustical Properties

Analytical Solution of Biot's Equations Based on Potential Functions Method

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Abolfazl Hasani Baferani ◽  
Abdolreza Ohadi
Keyword(s):  
Porous Media ◽  
Analytical Solution ◽  
Differential Equations ◽  
Porous Materials ◽  
Natural Frequency ◽  
Natural Frequencies ◽  
Potential Functions ◽  
Basic Field ◽  
Acoustical Properties ◽  
Biot’S Equations

In this paper, a new analytical solution for Biot's equations is presented based on potential functions method. The primary coupled Biot's equations have been considered based on fluid and solid displacements in three-dimensional (3D) space. By defining some potential functions, the governing equations have been improved to a simpler form. Then the coupled Biot's equations have been replaced with four-decoupled equations, by doing some mathematical manipulations. For a case study, it is assumed that the incident wave is in xy-plane and for specific boundary conditions; the partial differential equations are converted to ordinary differential equations and solved analytically. Then two foams with different properties have been considered, and acoustical properties of these foams due to the new developed method have been compared with the corresponding results presented by transfer-matrix method. Good agreement between results verifies the new presented solution. Based on the potential function method, not only the acoustical properties of porous materials are calculated, but also the analytical values of all basic field variables, such as pressure, fluid, and solid displacements, are obtained for all points in the porous media. Furthermore, fundamental features, such as damped and undamped natural frequencies, and damping coefficient of porous materials are calculated by considering presented results. The obtained results show that maximum values of field variables, such as pressure, fluid, and solid displacements, happen at the damped natural frequencies of the porous media, as expected. By increasing material thickness, the effect of damping of porous material on damped natural frequency decreases. Damping decreases the first natural frequency of the foam up to 8.5%.

scholarly journals Comprehensive comparison of pore-scale models for multiphase flow in porous media

2019 ◽  
Vol 116 (28) ◽  
pp. 13799-13806 ◽  
Author(s):  
Benzhong Zhao ◽  
Christopher W. MacMinn ◽  
Bauyrzhan K. Primkulov ◽  
Yu Chen ◽  
Albert J. Valocchi ◽  
...  
Keyword(s):  
Porous Media ◽  
Multiphase Flows ◽  
Rapid Development ◽  
Network Models ◽  
Industrial Applications ◽  
Flow In Porous Media ◽  
Pore Scale ◽  
Displacement Efficiency ◽  
Scale Models ◽  
Comprehensive Comparison

Multiphase flows in porous media are important in many natural and industrial processes. Pore-scale models for multiphase flows have seen rapid development in recent years and are becoming increasingly useful as predictive tools in both academic and industrial applications. However, quantitative comparisons between different pore-scale models, and between these models and experimental data, are lacking. Here, we perform an objective comparison of a variety of state-of-the-art pore-scale models, including lattice Boltzmann, stochastic rotation dynamics, volume-of-fluid, level-set, phase-field, and pore-network models. As the basis for this comparison, we use a dataset from recent microfluidic experiments with precisely controlled pore geometry and wettability conditions, which offers an unprecedented benchmarking opportunity. We compare the results of the 14 participating teams both qualitatively and quantitatively using several standard metrics, such as fractal dimension, finger width, and displacement efficiency. We find that no single method excels across all conditions and that thin films and corner flow present substantial modeling and computational challenges.

Reproducibility experiments on measuring acoustical properties of rigid-frame porous media (round-robin tests)

2007 ◽  
Vol 122 (1) ◽  
pp. 345-353 ◽  
Author(s):  
Kirill V. Horoshenkov ◽  
Amir Khan ◽  
François-Xavier Bécot ◽  
Luc Jaouen ◽  
Franck Sgard ◽  
...  
Keyword(s):  
Porous Media ◽  
Round Robin ◽  
Acoustical Properties ◽  
Rigid Frame

Coupling pore-scale networks to continuum-scale models of porous media

2007 ◽  
Vol 33 (3) ◽  
pp. 393-410 ◽  
Author(s):  
Matthew T. Balhoff ◽  
Karsten E. Thompson ◽  
Martin Hjortsø
Keyword(s):  
Porous Media ◽  
Pore Scale ◽  
Scale Models ◽  
Continuum Scale
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