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Get more information in this blog post: Characterizing the Flow and Choosing the Right Interface. The pressure drop is applied from right to left using Inlet and Outlet conditions. As this model is a representative cross section of the porous medium that we wish to characterize, a Symmetry condition is prescribed along the boundaries caused by the truncation of the geometry at the top and bottom.
These boundaries are indicated in the left figure below. The image on the right shows the results, visualized using a velocity magnitude color plot with arrow vectors of the flow direction.
Geometry and boundary conditions of the fully resolved microscale model solved with the Creeping Flow interface. Velocity magnitude color plot with a red arrow plot representing the orientation of the flow through the pore space. We first compute the porosity, por. In this 2D example, we need to calculate both the total area and the area represented by our computational domain.
We can compute the total area simply as a variable: This can be easily achieved by using an integration component coupling , a custom operator that can integrate any expression over domains, boundaries, and more. Definitions of variables used in computing the porosity and permeability.
The Darcy velocity can be computed with some help from the predefined variables within the Creeping Flow interface. This can then be divided by the height of the porous medium and again by 1 m, to account for the 2D approximation and obtain the Darcy velocity in the x direction. The results show us that this microscale representation of the porous medium has a porosity of 0. Results table for the computed porosity and permeability from the fully resolved flow submodel.
In this blog post, we discussed how we can use simulation to derive the macroscale properties of flow through porous media — solving a free flow problem on a fully resolved microscale submodel. Equipped with this information, we can use these parameters as input for a more descriptive macroscale model. Better still, this approach is the ideal way to know what input to use in a user-friendly app, such as in this example app that considers the productivity and safety of a perforated well. Thank you for sharing us this useful technique. I have tried many ways, but it is still there.
Do you have any experiences about how to solve it? Any response and help will be highly appreciated. For questions related to your modeling, please contact our Support team: Hi Andrew Young, Thank you for sharing with us, I am using the same example of pore scale model but doing the coupling with the heat transfer in porous media and solid mechanics, i need help in how to handle the 3 physics together, i can just couple 2……..
My thanks to you also for your feedback! It is certainly possible to extend the concept of this blog to include heat transfer and fluid-structure interaction i.
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