scholarly journals Quasi-static finite element modeling of seismic attenuation and dispersion due to wave-induced fluid flow in poroelastic media

2011 ◽  
Vol 116 (B1) ◽  
Author(s):  
Beatriz Quintal ◽  
Holger Steeb ◽  
Marcel Frehner ◽  
Stefan M. Schmalholz
Keyword(s):  
Finite Element ◽  
Fluid Flow ◽  
Finite Element Modeling ◽  
Seismic Attenuation ◽  
Element Modeling ◽  
Poroelastic Media ◽  
Wave Induced ◽  
Attenuation And Dispersion

Finite element modeling of seismic attenuation due to fluid flow in partially saturated rocks

2010 ◽  
Author(s):  
Beatriz Quintal ◽  
Holger Steeb ◽  
Marcel Frehner ◽  
Stefan M. Schmalholz
Keyword(s):  
Finite Element ◽  
Fluid Flow ◽  
Finite Element Modeling ◽  
Seismic Attenuation ◽  
Element Modeling ◽  
Partially Saturated

Finite Element Modeling of Fluid Flow, Heat Transfer, and Melting of Biomaterials in a Single-screw Extruder

2006 ◽  
Vol 69 (5) ◽  
pp. E212-E223 ◽  
Author(s):  
L.J. Wang ◽  
G.M. Ganjyal ◽  
D.D. Jones ◽  
C.L. Weller ◽  
M.A. Hanna
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Fluid Flow ◽  
Finite Element Modeling ◽  
Screw Extruder ◽  
Element Modeling ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Flow Heat

The Flow Analysis and Numerical Simulation of the Time-Pressure Dispensing System

2013 ◽  
Vol 401-403 ◽  
pp. 504-508
Author(s):  
Luo Hong Deng ◽  
Zai Liang Chen ◽  
Xiao Min Yang ◽  
Zhen Yu Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Fluid Flow ◽  
Finite Element Modeling ◽  
Spectral Method ◽  
Time Pressure ◽  
Flow Analysis ◽  
Inlet Pressure ◽  
Element Modeling ◽  
Pressure Distributions

The fluid flow of the time-pressure dispensing system was analyzed. Dispensing fluid was analyzed by finite element modeling based on N-S equation. Use CFX module to simulate dispensing process, and obtain the flow fields corresponding velocity & pressure distributions. Study the change rules of the adhesive amount dispensed affected by the inlet pressure, diameter and length of the needle. Finally, compare simulation values with the spectral method for two order approximations, the reliability and applicability of the model is proved.

scholarly journals Seismic wave attenuation and dispersion resulting from wave-induced flow in porous rocks — A review

Geophysics ◽  
2010 ◽  
Vol 75 (5) ◽  
pp. 75A147-75A164 ◽  
Author(s):  
Tobias M. Müller ◽  
Boris Gurevich ◽  
Maxim Lebedev
Keyword(s):  
Fluid Flow ◽  
Velocity Dispersion ◽  
Wave Attenuation ◽  
Field Measurements ◽  
Theoretical Models ◽  
Seismic Attenuation ◽  
P Wave ◽  
Induced Flow ◽  
Wave Induced ◽  
Attenuation And Dispersion

One major cause of elastic wave attenuation in heterogeneous porous media is wave-induced flow of the pore fluid between heterogeneities of various scales. It is believed that for frequencies below [Formula: see text], the most important cause is the wave-induced flow between mesoscopic inhomogeneities, which are large compared with the typical individual pore size but small compared to the wavelength. Various laboratory experiments in some natural porous materials provide evidence for the presence of centimeter-scale mesoscopic heterogeneities. Laboratory and field measurements of seismic attenuation in fluid-saturated rocks provide indications of the role of the wave-induced flow. Signatures of wave-induced flow include the frequency and saturation dependence of P-wave attenuation and its associated velocity dispersion, frequency-dependent shear-wave splitting, and attenuation anisotropy. During the last four decades, numerous models for attenuation and velocity dispersion from wave-induced flow have been developed with varying degrees of rigor and complexity. These models can be categorized roughly into three groups ac-cording to their underlying theoretical framework. The first group of models is based on Biot’s theory of poroelasticity. The second group is based on elastodynamic theory where local fluid flow is incorporated through an additional hydrodynamic equation. Another group of models is derived using the theory of viscoelasticity. Though all models predict attenuation and velocity dispersion typical for a relaxation process, there exist differences that can be related to the type of disorder (periodic, random, space dimension) and to the way the local flow is incorporated. The differences manifest themselves in different asymptotic scaling laws for attenuation and in different expressions for characteristic frequencies. In recent years, some theoretical models of wave-induced fluid flow have been validated numerically, using finite-difference, finite-element, and reflectivity algorithms applied to Biot’s equations of poroelasticity. Application of theoretical models to real seismic data requires further studies using broadband laboratory and field measurements of attenuation and dispersion for different rocks as well as development of more robust methods for estimating dissipation attributes from field data.

scholarly journals An energy-based approach to estimate seismic attenuation due to wave-induced fluid flow in heterogeneous poroelastic media

2016 ◽  
Vol 207 (2) ◽  
pp. 823-832 ◽  
Author(s):  
Santiago G. Solazzi ◽  
J. Germán Rubino ◽  
Tobias M. Müller ◽  
Marco Milani ◽  
Luis Guarracino ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Seismic Attenuation ◽  
Poroelastic Media ◽  
Wave Induced
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