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Earth Science Module
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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, from solid to liquid for instance, energy is added to the solid. Instead of creating a temperature rise, the energy alters the molecular structure of the material....
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Buoyancy Flow of Free Fluids
This model couples the Navier Stokes equations and the heat transfer equations to examine density driven flow of free fluids. Here the fluid is in a square cavity with a heated wall. The buoyancy force is a Boussinesq term added to the Navier-Stokes equations. The equation is nondimensionalized, s...
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Pesticide Transport and Reaction in Soil
Aldicarb is a commercial pesticide, used on a variety of crops, including cotton, fruits, potatoes, and beans. This arises in the possibility that the general population may be exposed to aldicarb through the ingestion of contaminated water and foods.
This example looks at the degradation kinetic...
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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, dependant on temperature, being directly typed...
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Sorbing Solute
In this example water ponded in a ring on the ground moves into a relatively dry soil column and carries a chemical with it. As it moves through the variably saturated soil column, the chemical attaches to solid particles, slowing the solute transport relative to the water. Additionally the chemical...
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Darcy - Brinkman Example
This example model characterizes a transition in flow regimes: slow flow in porous media quickens to a perforation in a well casing and ultimately moves into and up the well.
Darcy’s law describes flow velocities at a distance from the well. Closer to the perforation the Brinkman equations app...
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Pore-Scale Flow
This non-conventional model of porous media flow utilizes Navier-Stokes equations 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. The geomet...
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Biot Poroelasticity
The Biot Poroelasticity example two-way couples Darcy's law and the plane strain application modes 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 analy...
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Buoyant Darcy Flow: The Elder Problem
This model of buoyancy flow driven by salt concentrations is a benchmark problem originally posed for heat flow by Elder (1967) and recast for solute transport by Voss and Souza (1987). It has been used to benchmark numerous density flow codes including SEAWAT (Guo and Langevin) and SUTRA (Voss)....
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Calculation of the Height of the Water Table in an Unconfined Aquifier
This model demonstrates COMSOL Multiphysics application to a benchmark case of steady-state fluid flow and transient solute transport through a vertical cross section in an unconfined aquifer.
The model estimates the height of the water table - the upper surface of the unconfined aquifer.
Bec...
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