Snow, Benjamin Warner, 1860- · Madison, Wis. · leaf 233
luid, but must either terminate at each end in thesurface of the fluid, or be bent into the form of a ring, the tAvoends being brought together. Hence vortices are either linearor ring-shaped, and may be knotted or twisted in any mannerwhatever. 3. While the medium surrounding the vortex does not… … 228 VORTICES AND DIFFUSION. 6. A ring-shaped vortex moves forward along the axis ofthe ring in the direction in which the particles of the fluid onthe inner surface of the ring are moving, Fig. 156. 7. The fluid enclosed by thering, altliough not rotating,moves forward in the directionin which the…
Physics
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