A Long Page
Links here go to the coffee-ring page and back home.
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Evaporation at the edge
The evaporative flux diverges near the contact line, which is why the edge dominates the deposit.
Outward flow
Mass conservation forces liquid outward to replenish the edge.
def height_averaged_radial_velocity(radius, time, drop_radius, drying_time, contact_angle):
return (drop_radius / (4 * radius * (drying_time - time))) * ((1 - (radius / drop_radius) ** 2) ** -0.5 - (1 - (radius / drop_radius) ** 2))Pinned contact lines
This is the fragment-scroll target: a link to long-page.qmd#pinned-contact-lines should open the preview scrolled to this heading.
Depinning events
When the deposit can no longer hold the line, it jumps inward and re-pins, leaving nested rings.
Closing
Enough sections to force the preview to truncate and scroll. A link to a missing page demonstrates the “no preview available” state without breaking navigation any further than the missing page already does.