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The calculation of κ in the Electrostatics Model

User: "Alice Sun"
Alice Sun
Altair Community Member
Updated by Alice Sun

I tried to estimate the value of k, but there is a big difference between the calculated value and the particle electrostatic force derived from the simulation. I am confused about the meaning of "The last term is the local charge concentration (where n is the number of particles of charge z)".

For a testing case containing one large particle (radius 0.5 mm; charge: 2e-11 C) and 5 small particles (radius 0.2 mm; charge: -5e-12 C), the screening distance is 10Rmin, how to calculate the values of n and z ?

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    User: "Stephen Cole"
    Stephen Cole
    Altair Employee
    Updated by Stephen Cole

    Hi Alice,

     

    I'm not sure myself but it may be detailed more in the orignal refrences:

    Casper M.J. (1997) Physical chemistry of surfaces (3rd). Chapter5. Adamson A.W. and Gast A.P., Editors. John Wiley & Sons, Inc.

    Hogue M.D.  et al. (2008) Calculating the trajectories of triboelectrically charged particles using Discrete Element Modeling (DEM). Journal of Electrostatics, 66(1): p. 32-38. http://dx.doi.org/10.1016/j.elstat.2007.08.007

     

    Regards

    Stephen

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