Abstract
One of the major challenges in printable electronics fabrication is the
print resolution and accuracy for high precision applications such as
printable displays. In this paper, the lattice Boltzmann method (LBM) is
used for the direct numerical simulation of an inkjet-printed colloidal drop
wetting on a patterned substrate for confined deposition. The
two-dimensional multiphase particle suspension LBM model previously
developed by the authors is extended to three-dimensional with the addition
of the particle rotational dynamics and an improved treatment of
particle–particle forces. The model is used to study the contact
angle hysteresis and the stick–slip behavior of the contact line
motion as a liquid drop wetting and evaporating on a patterned substrate.
Finally, the dynamics of a colloidal drop containing many suspended
particles are examined with and without evaporation. Results show that
colloidal jamming occurs at the liquid-vapor interface as the drop
preferentially wets and evaporates on a patterned substrate. This model
development is an important first step towards understanding the complex
transport phenomena present in an inkjet-printed evaporating drop for
printable electronics fabrication.
© 2010 IEEE
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