Numerical Simulation of Thermoelastic Nonlinear Waves in Fluid Saturated Porous Media with Non-local Darcy Law

2020 ◽  
pp. 279-289
Author(s):  
Miglena N. Koleva ◽  
Yuri Poveschenko ◽  
Lubin G. Vulkov
Keyword(s):  
Numerical Simulation ◽  
Porous Media ◽  
Nonlinear Waves ◽  
Darcy Law ◽  
Saturated Porous Media ◽  
Non Local ◽  
Fluid Saturated Porous Media

Semi-analytical finite element method for simulating chemical dissolution-front instability problems in fluid-saturated porous media

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chongbin Zhao ◽  
B.E. Hobbs ◽  
Alison Ord
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Porous Media ◽  
Chemical Dissolution ◽  
Saturated Porous Media ◽  
Content Type ◽  
Front Instability ◽  
Fluid Saturated Porous Media ◽  
Dissolution Front ◽  
Element Method

PurposeThe objective of this paper is to develop a semi-analytical finite element method for solving chemical dissolution-front instability problems in fluid-saturated porous media.Design/methodology/approachThe porosity, horizontal and vertical components of the pore-fluid velocity and solute concentration are selected as four fundamental unknown variables for describing chemical dissolution-front instability problems in fluid-saturated porous media. To avoid the use of numerical integration, analytical solutions for the property matrices of a rectangular element are precisely derived in a purely mathematical manner. This means that the proposed finite element method is a kind of semi-analytical method. The column pivot element solver is used to solve the resulting finite element equations of the chemical dissolution-front instability problem.FindingsThe direct use of horizontal and vertical components of the pore-fluid velocity as fundamental unknown variables can improve the accuracy of the related numerical solution. The column pivot element solver is useful for solving the finite element equations of a chemical dissolution-front instability problem. The proposed semi-analytical finite element method can produce highly accurate numerical solutions for simulating chemical dissolution-front instability problems in fluid-saturated porous media.Originality/valueAnalytical solutions for the property matrices of a rectangular element are precisely derived for solving chemical dissolution-front instability problems in fluid-saturated porous media. The proposed semi-analytical finite element method provides a useful way for understanding the underlying dynamic mechanisms of the washing land method involved in the contaminated land remediation.

Analysis of radiation patterns for optimized full waveform inversion in fluid-saturated porous media

2018 ◽  
Vol 216 (3) ◽  
pp. 1919-1937 ◽  
Author(s):  
Qingjie Yang ◽  
Alison Malcolm ◽  
Herurisa Rusmanugroho ◽  
Weijian Mao
Keyword(s):  
Porous Media ◽  
Waveform Inversion ◽  
Full Waveform Inversion ◽  
Saturated Porous Media ◽  
Radiation Patterns ◽  
Full Waveform ◽  
Fluid Saturated Porous Media
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