Wave Propagation in Dispersed Random Media

1991 ◽  
Vol 253 ◽  
Author(s):  
Ping Sheng ◽  
Xiaodun Jing ◽  
Minyao Zhou
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Wave Propagation ◽  
Random Media ◽  
Colloidal Suspensions ◽  
Quantitative Agreement ◽  
Dispersion Relations ◽  
Potential Approximation ◽  
Acoustic Excitations ◽  
Comparison With Experimental Data

ABSTRACTWe present a generalized coherent potential approximation for the identification of quasi propagating modes in dispersed random media and the calculation of their dispersion relations. The validity of this approach is supported by multiple-scattering calculations, numerical simulation, and comparison with experimental data on acoustic excitations in colloidal suspensions. Our theory yields excellent quantitative agreement with the measured dispersion relations and provides an explanation for the observed frequency gaps in the excitations spectra.

scholarly journals NUMERICAL SIMULATION OF CROSS-SHORE PROFILE EVOLUTION USING OPENFOAM

2017 ◽  
pp. 22
Author(s):  
Nikolaos Karagiannis ◽  
Theofanis Karambas ◽  
Christopher Koutitas
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Wave Propagation ◽  
Sediment Transport ◽  
Iterative Procedure ◽  
Numerical Approach ◽  
Numerical Results ◽  
Hydrodynamic Characteristics ◽  
Sloping Beach ◽  
Comparison With Experimental Data

In the present work, an innovative numerical approach was developed coupling two models in order to simulate the wave propagation over a sloping beach and the sediment transport in surf and swash zones. The first model, synthesized on the basis of OpenFOAM (version 2.4.0) is used to describe the hydrodynamic characteristics of the flow and the wave propagation while the second one is applied for the sediment transport and erosion/deposition prediction using the results of the first model. The method above constitutes an iterative procedure which is tested hereby and seems to yield satisfactory numerical results in comparison with experimental data (Dette 1998).

scholarly journals Numerical Simulation of the Full-Polarimetric Emissivity of Vines and Comparison with Experimental Data

2009 ◽  
Vol 1 (3) ◽  
pp. 300-317 ◽  
Author(s):  
Alberto Martinez-Vazquez ◽  
Adriano Camps ◽  
Juan Manuel Lopez-Sanchez ◽  
Mercedes Vall-llossera ◽  
Alessandra Monerris
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Comparison With Experimental Data

Soft Tissue Strain and Facet Face Interaction in the Lumbar Intervertebral Joint—Part II: Calculated Results and Comparison With Experimental Data

1983 ◽  
Vol 105 (3) ◽  
pp. 210-215 ◽  
Author(s):  
A. F. Tencer ◽  
T. G. Mayer
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Soft Tissue ◽  
Ligamentum Flavum ◽  
Compressive Strain ◽  
Shear Resistance ◽  
Facet Joints ◽  
Lateral Bending ◽  
Tissue Strain ◽  
Comparison With Experimental Data

A numerical simulation of soft-tissue strain and facet face interaction in the lumbar intervertebral joint under load was performed. The results, compared with a previous experimental sectioning study, showed that disk fiber strain was the main mechanism in shear resistance, except posterior shear, where the facets were main load bearing members. In axial compression, compression of the annulus was found, with a significant decrease in compressive strain resulting from annulus bulging, but no contact was found in the facet joints. The posterior ligaments, except for the facet capsules and ligamentum flavum, were found to be active only in flexion and lateral bending, while the facets and the disk both played major roles in resisting axial torsion moments.

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