Finite‐element modeling of multibody contact and its application to active faults

Xing, Huilin; Makinouchi, Akifumi

doi:10.1002/cpe.623

Cited by 20 publications

(21 citation statements)

References 21 publications

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“…Besides of those discussed as above for a suitable unstructured mesh construction by using geological data, an efficient and stable finite element code is required to simulate the interacting fault dynamics which is more complicated due to the strong nonlinearity related to the stick-slip frictional instability along faults. A finite element module ESyS_Crustal has been developed and tested with the so-called subduction fault model (Xing and Makinouchi, 2002b), sandwich fault model (Xing and Makinouchi, 2002a), single fault bend model and multiple fault bends model , the Chuan-Dian and Southern California fault model Xing et al, 2007). Frictional contact problems that are required for fault dynamics simulation are characterized by contact constraints that are imposed on contacting boundaries.…”

Section: By Using Tetrahedron Meshmentioning

confidence: 99%

Recent development in numerical simulation of enhanced geothermal reservoirs

et al. 2015

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This paper briefly introduces the current state in computer modelling of geothermal reservoir system and then focuses on our research efforts in high performance simulation of enhanced geothermal reservoir system. A novel supercomputer simulation tool has been developing towards simulating the highly non-linear coupled geomechanical-fluid flow-thermal systems involving heterogeneously fractured geomaterials at different spatial and temporal scales. It is applied here to simulate and visualise the enhanced geothermal system (EGS), such as (1) visualisation of the microseismic events to monitor and determine where/how the underground rupture proceeds during a hydraulic stimulation, to generate the mesh using the recorded data for determining the domain of the ruptured zone and to evaluate the material parameters (i.e., the permeability) for the further numerical analysis and evaluation of the enhanced geothermal reservoir; (2) converting the available fractured rock image/fracture data as well as the reservoir geological geometry to suitable meshes/grids and further simulating the fluid flow in the complicated fractures involving the detailed description of fracture dimension and geometry by the lattice Boltzmann method and/or finite element method; (3) interacting fault system simulation to determine the relevant complicated rupture process for evaluating the geological setting and the in-situ reservoir properties; (4) coupled thermo-fluid flow analysis of a geothermal reservoir system for an optimised geothermal reservoir design and management. A few of application examples are presented to show its usefulness in simulating the enhanced geothermal reservoir system. KEY WORDS: numerical simulation, geothermal, EGS, microseismicity, finite element method, lattice Boltzmann method. INTRODUCTIONOver the past 30 years, a large amount of research and field testing on engineered geothermal system (EGS), also known as hot dry rock (HDR) and hot fractured rock (HFR) geothermal reservoirs, have been accomplished worldwide which include the reservoir construction, fluid circulation and heat extraction (e.g., Tester et al., 2006). A successful EGS reservoir depends on thermal-fluid flow at any given time which primarily determined by its mean temperature and pressure, the nature of the interconnected network of hydraulic stimulated joints and open fractures (including both stimulated and natural), the cumulative amount of fluid circulation (reservoir cooling) that has occurred and water loss (Rybach, 2010; Brown et al., 1999). The reservoir characteristics are complicated and functions of the applied reservoir pressure/stress that are controlling the nature and degree of interconnection within the network of fractures, therefore it is crucial to have good measures and understanding of such reservoir characteristics (i.e., permeability)

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Section: By Using Tetrahedron Meshmentioning

confidence: 99%

Recent development in numerical simulation of enhanced geothermal reservoirs

et al. 2015

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“…As for the details on how to solve the above equations for large-scale problems, please refer to XING et al (1998) and XING and MAKINOUCHI, 2002band 2002c.…”

Section: Time Integration Algorithmmentioning

confidence: 99%

“…Finite-element software based on the above theory has been developed and tested with the so-called sandwich fault model (XING and MAKINOUCHI, 2002a), subduction fault model (XING, 2001a;XING, 2002b), single fault bend model (including both the interplate and intraplate cases) (XING et al, 2003a(XING et al, , b, 2004a, multiple fault bends model MORA, 2003c, 2006) and the Southern California fault model (XING and MORA, 2004b). It is applied here to simulate stress/velocity variations of the South Australian (SA) fault system in a discrete model with 504,471 nodes constructed as above using fault data supplied by Professor Mike Sandiford of Melbourne University.…”

Section: Numerical Simulation Of South Australia Fault System Modelmentioning

confidence: 99%

Construction of an Intraplate Fault System Model of South Australia, and Simulation Tool for the iSERVO Institute Seed Project

Xing

Móra

2006

Pure appl. geophys.

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To foster ongoing international cooperation beyond ACES (APEC Cooperation for Earthquake Simulation) on the simulation of solid earth phenomena, agreement was reached to work towards establishment of a frontier international research institute for simulating the solid earth: iSERVO = International Solid Earth Research Virtual Observatory institute (http://www.iservo.edu.au). This paper outlines a key Australian contribution towards the iSERVO institute seed project, this is the construction of: (1) a typical intraplate fault system model using practical fault system data of South Australia (i.e., SA interacting fault model), which includes data management and editing, geometrical modeling and mesh generation; and (2) a finite-element based software tool, which is built on our longterm and ongoing effort to develop the R-minimum strategy based finite-element computational algorithm and software tool for modelling three-dimensional nonlinear frictional contact behavior between multiple deformable bodies with the arbitrarily-shaped contact element strategy. A numerical simulation of the SA fault system is carried out using this software tool to demonstrate its capability and our efforts towards seeding the iSERVO Institute.

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“…A so-called R-minimum strategy was proposed and extended to analyse the non-linear deformation (including thermal-mechanical coupling and frictional contact) of elasto-plastic materials [14][15][16][17]. The R-minimum strategy is a static-explicit algorithm without iterations.…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of non-linear deformation of rate-dependent materials using a R-minimum strategy

Xing

Zhang

2009

Acta Geotech.

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A R-minimum strategy, which was proposed and successfully applied to analyse the non-linear rateindependent finite deformation (including the thermalmechanical coupling and frictional contact) of elasto-plastic materials, is extended and applied here to simulate the deformation of rate-dependent materials. It involves no iterations, thus belongs to the static-explicit algorithm and avoids the convergence problem resulting from nonlinearities. The R-minimum strategy-based adaptive control scheme of the time step size is proposed and applied to the related analysis of the rate-dependent materials with both the time-dependent and the time-independent viscosity. Both the simple benchmark test and the practical application in evaluation of the effect of the Earth materials on its response to the centrifugal force are carried out to demonstrate the stability, efficiency and usefulness of this algorithm.

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Finite‐element modeling of multibody contact and its application to active faults

Cited by 20 publications

References 21 publications

Recent development in numerical simulation of enhanced geothermal reservoirs

Recent development in numerical simulation of enhanced geothermal reservoirs

Construction of an Intraplate Fault System Model of South Australia, and Simulation Tool for the iSERVO Institute Seed Project

Finite element modelling of non-linear deformation of rate-dependent materials using a R-minimum strategy

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