Recent content by howtophysics

  1. H

    Stiff spring boundary conditions?

    Wow - again - thanks Sid! That really did help me frame the concepts quite a bit better. Are there any books on the subject you could recommend that have helped you in your understanding of these kinds of concepts (relating to FEA)?
  2. H

    Stiff spring boundary conditions?

    Thanks for the reply! That does help - and I really appreciate some summary background. What you said makes a fair bit of sense (but let me try) -- so the solution changes quickly at a boundary. I guess that this would come, in part, from the different solubilities of the gas between the...
  3. H

    Stiff spring boundary conditions?

    Let me see if I can line out my question a little better to hopefully get some sort of input. I am trying to understand where a type of boundary condition approx. called stiff spring BCs. I have, among a couple of other examples, an example comsol "dialysis" model that uses it. I have been...
  4. H

    Is Normalizing Oxygen Concentrations in a Channel Accurate?

    Tell me if this line of reasoning is correct: The partial pressure (PP) of oxygen in water which is saturated with air is the same as the partial pressure of the oxygen in the air around the water. Now, if I have a channel where cells are consuming oxygen, the PP is going to be going down...
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