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Density formulation

  1. Sep 6, 2010 #1
    Good morning. I am researching the development of a theoretical material that behaves in a very particular way. Specifically, I am talking about a variable viscosity fluid whose properties change in function of small temperature changes and a secondary external variable (let's say an applied voltage, for example, though this could change). Now, the concentration of particles within the fluid is (at least temporarily) variable and stable within the structure of the fluid, and this would be possible because of the second external variable. This viscous fluid would be able to behave like a solid under the proper conditions (think glass).

    Now if we put a column of this fluid and have the ability to apply both of these external variables in precise amounts at the very least two things will occur:
    1-The height of the column will change as the fluid expands/contracts.
    2-Diffusion will occur within the column whenever the parameters change to achieve a new state of equilibrium (the column is a closed system though, the total mass remains constant).

    Now, I am theoretically able to determine the overall total number of particles that have migrated from any part of the fluid to another on any given time, also I have the height of the column at all times, and the total number of particles in the fluid (thus mass).

    What I am looking for is a way to link these known variables with 1) temperature, and 2) material stiffness or viscosity. In particular, I'd like to listen to chemists to see if is possible and how to apply Fick's Laws to this matter. Basically I need the point of view of a chemist to guide me in the right direction.

  2. jcsd
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