Mojo Posted December 5, 2022 Share Posted December 5, 2022 Hi, I am building a dual porosity model in XT1. Could you please tell me: 1. How the the cumulative surface area of the stagnant zones affect a mineral reaction rate? I have my custom rate and need to know how to revise it to capture this. I have set the surface area of each mineral based on cm2/gr and I call "Surface" in my costume rate law. But certainly this is wrong as the minerals surface areas should be affected by the cumulative surface area of the stagnant zones. 2. Are the minerals equally distributed between the cubes representing the stagnant zones? 3. What is the half-width of the cubes? Is it half of the width of the cube? And what is it for slab? What is the slab thickness? 4. Can we set any arbitrary number for half-width of the cube as long as it is smaller than Node dimensions? For example, if my node cross sectional area is 10*10 cm2, how is it possible to have cubes with half-width of 2 cm while the volume fraction of stagnant zone is 0.9? How the cube can fit the node cross section while honouring their defined sizes and also the volume fraction of stagnant zones? In the manual's example, half-width of spheres defining stagnant zone was much higher than domain surface area, how is that possible? Can you show me the concept in a graphic please? I attached the common concept of dual porosity model to this text. The Spheeris or Cubes should fit the domain. 5. Should not the porosity of fracture considered to be equal to one for the dual porosity model and matrix or stagnant zones have its own porosity? The Node/grid porosity should be calculated from these two values. In the Medium section, does the Porosity refer to overall Node porosity? Many thanks and kind regards Mojo Quote Link to comment Share on other sites More sharing options...
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