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Subsurface Flow Modulex

Phase Change

This example demonstrates how to model a phase change and predict its impact on a heat transfer analysis. When a material changes phase, for instance from solid to liquid, energy is added to the solid. Instead of creating a temperature rise, the energy alters the material’s molecular ... Читать дальше

Pore-Scale Flow

This non-conventional model of porous media flow utilizes creeping (Stokes) flow in the interstices of a porous media. The model comes from the pore-scale flow experiments conducted by Arturo Keller, Maria Auset, and Sanya Sirivithayapakorn of the University of California, Santa Barbara. ... Читать дальше

Free Convection in a Porous Medium

This example treats the modeling of sub-surface flow where free convection in porous media is analyzed. The results are compared with published literature in the field. The model couples the momentum balance to an energy balance through an equation, dependent on temperature, being ... Читать дальше

Two-Phase Flow Experiment

The first model describes the simultaneous flow of two immiscible fluids in porous media - here air displaces water in a multi-step inlet pressure experiment. We solve for the pressure and the degree saturation for the air and water within a representative volume and so track saturation ... Читать дальше

Geothermal Doublet Geometry

This is one of the two models from the blog post about heat transfer in the subsurface: [Coupling Heat Transfer with Subsurface Porous Media Flow](/blogs/coupling-heat-transfer-subsurface-porous-media-flow/) The animated GIFs show the propagation of an isothermal cold front (295 K) for ... Читать дальше

Biot Poroelasticity

The Poroelasticity interface couples Darcy's law and solid mechanics to assess deformation of porous media that results from fluid withdrawals. The model builds on top of the Terzaghi Compaction example. Results from Terzaghi compaction and Biot poroelasticity analyses are compared ... Читать дальше

Forchheimer Flow

This is a tutorial model of the coupling between flow of a fluid in an open channel and a porous block attached to one of the channel walls. The flow is described by the Navier-Stokes equation in the free region and a Forchheimer-corrected version of the Brinkman equations in the porous ... Читать дальше

Buoyancy Flow with Darcy's Law—The Elder Problem

Density variations can initiate flow even in a still fluid. In earth systems, density variations can arise from naturally occurring salts, subsurface temperature changes, or migrating pollution. This buoyant or density-driven flow factors into fluid movement in salt-lake systems, saline ... Читать дальше

Thermal Impact of a Borehole Heat Exchanger Array

This model shows how to compute an array of borehole heat exchangers (BHEs) for shallow geothermal energy production. The BHEs are simplified as cylindrical heat sinks with a uniform heat extraction rate. The array is embedded into a layered subsurface model with groundwater flow in one ... Читать дальше

Discrete Fracture

This example models free flow through a fracture in a block of porous media, where flow in the fracture is much faster than in the matrix block. The Darcy's law physics interface is used to model the flow in the porous block The fracture flow is modeled by adding the Fracture Flow ... Читать дальше

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