The Physics of Microdroplets

This page contains Evolver datafiles for Chapter 2 images. The data files contain evolution scripts (always named "gogo") and scripts for producing EPS files for the book images (always named "run").

The image scripts set the viewing angle with the "view_matrix := ..." command. The particular view matrix used was generated by moving the surface by mouse by hand and then printing out the view matrix with the "print view_matrix" command, and cutting and pasting the result into the command.

Fig. 2-7 Critical length fluid cylinders.
Fig. 2-8 Unstable modes of cylinders.
Fig. 2-9 Catenoid.
Fig. 2-10 Unduloids.
Fig. 2-11 Nodoids.
Fig. 2-14 Liquid in bottom of round well.
Fig. 2-15 Liquid in bottom of square well.

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Fig. 2-7 Critical length fluid cylinders.

The rouloid images are all made from a single datafile, rouloids.fe, which contains two-parameter parametric boundary definitions for the various rouloids. The type of rouloid is determined by the variable "rp", with rp = 1 for a cylinder. The longitudinal extent is given by the interval of the rolling angle (which is the second parameter of the parametric boundary), and is set using the function set_p2().

Datafile: rouloids-all.fe

Fig. 2-8 Unstable modes of fluid cylinders.

The unstable modes for fixed and free ends, as the length exceeds the critical length. These images were done by using the "saddle" command to calculate the most unstable mode, and then using the "move" command to perturb the surface by the desired amount. See the second half of the "run_cylinders" command in the datafile.

Datafile: rouloids-all.fe