Simulation of Salinity- And Thermohaline-Driven Flow in Fractured Porous Media

Grillo, Alfio; Lampe, M.; Logashenko, D.; Stichel, S.; Wittum, Gabriel

doi:10.1615/jpormedia.v15.i5.40

Cited by 14 publications

(10 citation statements)

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“…The fracture contains ∼5,000 triangular surface elements, while the 3D domain around it contains ∼350,000 tetrahedral and triangular prism elements. Using 2D surface elements to model a 3D, large aspect‐ratio feature has been shown to reduce simulation time without sacrificing accuracy (Grillo et al., 1999; Juanes et al., 2002; Kim & Deo, 2000). The average fracture surface element has a height and length of 100 m, while the width of the fracture zone is set to 1 m.…”

Section: Methodology and Model Setupmentioning

confidence: 99%

Elastic and Thermoelastic Effects on Thermal Water Convection in Fracture Zones

Patterson

Driesner

2021

JGR Solid Earth

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Section: Methodology and Model Setupmentioning

confidence: 99%

Elastic and Thermoelastic Effects on Thermal Water Convection in Fracture Zones

Patterson

Driesner

2021

JGR Solid Earth

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“…The sPDE ( 8 ) computations were performed with UG4 [ 49 , 50 , 51 ] based on Finite Volumes discretisations [ 52 , 53 , 54 ] and massively parallel multigrid solvers [ 55 , 56 ]. (UG has been used successfully within various areas of computational physics [ 57 , 58 ] and biophysics, namely computational neuroscience [ 59 , 60 , 61 , 62 ] and computational pharmacology [ 63 , 64 ]). For technical details concerning the discretization methods and the massively parallel multigrid solvers, we refer to our former paper [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Quantitative Analysis of Hepatitis C NS5A Viral Protein Dynamics on the ER Surface

Knodel

Nägel

Reiter

et al. 2018

Viruses

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Exploring biophysical properties of virus-encoded components and their requirement for virus replication is an exciting new area of interdisciplinary virological research. To date, spatial resolution has only rarely been analyzed in computational/biophysical descriptions of virus replication dynamics. However, it is widely acknowledged that intracellular spatial dependence is a crucial component of virus life cycles. The hepatitis C virus-encoded NS5A protein is an endoplasmatic reticulum (ER)-anchored viral protein and an essential component of the virus replication machinery. Therefore, we simulate NS5A dynamics on realistic reconstructed, curved ER surfaces by means of surface partial differential equations (sPDE) upon unstructured grids. We match the in silico NS5A diffusion constant such that the NS5A sPDE simulation data reproduce experimental NS5A fluorescence recovery after photobleaching (FRAP) time series data. This parameter estimation yields the NS5A diffusion constant. Such parameters are needed for spatial models of HCV dynamics, which we are developing in parallel but remain qualitative at this stage. Thus, our present study likely provides the first quantitative biophysical description of the movement of a viral component. Our spatio-temporal resolved ansatz paves new ways for understanding intricate spatial-defined processes central to specfic aspects of virus life cycles.

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“…Discretely modeling high aspect‐ratio fractures in a large domain is accomplished by using lower‐dimensional (surface) elements to represent fractures. This saves computation time while no accuracy is lost (Juanes et al, ) but can only be used when fracture permeability is larger than host rock permeability and the fracture/fault has a large aspect ratio (Grillo et al, ; Kim & Deo, ). To describe and compare fractures of varying width and permeability, we use fracture transmissivity:

T_{fr} = k \cdot a,

…”

Section: Model Setupmentioning

confidence: 99%

Heat and Fluid Transport Induced by Convective Fluid Circulation Within a Fracture or Fault

Patterson¹,

Driesner²,

Matthäi

et al. 2018

JGR Solid Earth

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Natural water convection in subvertical fractures, fracture zones, or faults can perturb the temperature field around the fracture and enhance and focus vertical heat flow within. We investigate, by means of numerical simulation, the effects of convection in a deeply buried vertical fracture zone. Fracture zone transmissivity, defined as permeability times thickness of the permeable region, is found to be the primary control on convection style rather than fracture zone thickness or permeability alone. In an impermeable host rock, the convection‐induced thermal anomaly propagates solely via conduction, diminishing away from the fracture. Convective heat flow increases with fracture transmissivity up to ~10−8 m3, when a plateau in convective heat flow is reached, constrained by fracture size and the host rock's thermal conductivity. Permeable host rocks modify these results significantly. In a moderately permeable host rock (10−14 m2), convection in the fracture induces non‐Rayleigh fluid convection, while thermal effects and fluid exchange between host rock and fracture remain moderate. If the host rock is sufficiently permeable to allow porous medium Rayleigh convection to occur (10−13 m2), the convection patterns within the fracture are overprinted by the host's convective patterns. Fluid exchange between the fracture and the rock will be significant. Our findings provide insight into how thermal anomalies in the uppermost crust may relate to locally enhanced heat flow from convection in nonoutcropping fractures below. Furthermore, the results for permeable host rocks provide evidence for previously inferred hydrologic scenarios for the formation of certain hydrothermal, vein‐type mineral deposits.

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Simulation of Salinity- And Thermohaline-Driven Flow in Fractured Porous Media

Cited by 14 publications

References 0 publications

Elastic and Thermoelastic Effects on Thermal Water Convection in Fracture Zones

Elastic and Thermoelastic Effects on Thermal Water Convection in Fracture Zones

Quantitative Analysis of Hepatitis C NS5A Viral Protein Dynamics on the ER Surface

Heat and Fluid Transport Induced by Convective Fluid Circulation Within a Fracture or Fault

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