You’ll definitely want to check out this video because it features a loop-de-loop lab apparatus designed to spew water into the air. But it’s more than just a twist on one of those science fair volcano models: The UC Berkeley earth sciences professor who designed it says it demonstrates the basic mechanics of geysers like Old Faithful.
Michael Manga and his colleagues report on their findings in the February issue of the Journal of Volcanology and Geothermal Research. They spent years studying geysers in Chile and at Yellowstone National Park. They found that geysers like Old Faithful really were just that, erupting with shocking regularity.
Manga’s model isn’t quite so reliable. But it does follow the same principle of periodic eruptions that his measurements suggest are due to kinks in the geysers’ pipes. These underground twists and turns trap steam, forcing it to slowly bubble out and heat the water column above.
“Most geysers appear to have a bubble trap accumulating the steam injected from below, and the release of the steam from the trap gets the geyser ready to erupt,” Manga said in a statement. “You can see the water column warming up and warming up until enough water reaches the boiling point that, once the top layer begins to boil, the boiling becomes self-perpetuating.”