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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Drug Deliv Transl Res. 2011 May 17;1(3):256–276. doi: 10.1007/s13346-011-0029-z

Fig. 16.

Fig. 16

Coordinate system and parameters for model of spreading of gel due to gravity [72]. The upper gel surface is a free surface, and the gel slides down a flat surface due to the force of gravity [53]. This is a two dimensional channel-like model, akin to that in Fig. 11