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How to create pores/holes in geometry + diffusion study?
Posted Nov 20, 2011, 6:51 p.m. EST Fluid & Heat, Geometry, Materials, Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization, Studies & Solvers Version 4.2, Version 4.2a 2 Replies
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I am brand new to ComSol. For our bioengineering project, we are trying to see if particles will diffuse radially into a hollow cylindrical structure.
I am having difficulty understanding how to:
-create pores or holes on the cylinder. I want to be able to easily change the number of pores (and the size of the pores) on the structure.
-run a study that displays the concentration gradient of particles over time. (or somehow measure how many particles diffuse to the inside/center of the cylinder.
Note:
-I completed the busbar tutorial and the "creating geometries" tutorial, so that is the extent of my experience.
I was able to create a hollow cylinder of defined thickness.
Ideally:
I want to create 6 concentric cylinders. Each has the same pore density and pore size. We are trying to test this setup using a variety of pore densities, and measure when a significant amount of diffusion occurs in the innermost layer at a fixed time, t.
I have access to ComSol 4.2 (not 4.2a yet, but I believe we can run diffusion studies even without the particle tracing model).
I hope what I am asking is making sense. Any guidance would be greatly appreciated. I dont know what study to use, and what parameters I would need to set in the study.
Thank you so much, and let me know if you need more information!
-Arjun
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Normally you do not generate the pores as geometrical items, that would be too computational heavy, but you apply them by the "physics" via pore data, check carefully the doc, and the related books on the subject. And do some examples, the bush bar is OK for learning solid and ACDC Joule heating, but yu should study some of the numerous model library examples in the diffusion section (chemical, subsurface flow, cfd, microfluidics ...
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Good luck
Ivar
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