Mineral plumes · Buoyancy-driven flow · Chemosynthesis · Tubeworm colonies
This simulator models hydrothermal vents — fissures on the ocean floor where geothermally heated water erupts into near-freezing seawater. "Black smokers" form when dissolved minerals (iron, copper, zinc sulphide) precipitate on contact with cold water, creating dark plumes that can reach temperatures above 400 °C. Despite the extreme conditions, these vents support rich ecosystems through chemosynthesis — bacteria oxidise hydrogen sulphide to power the base of the food chain, supporting tubeworms, giant clams and vent shrimp.
The first hydrothermal vents were discovered in 1977 near the Galápagos Islands at a depth of 2 500 m. The hottest recorded black smoker measured 464 °C — yet water doesn't boil because the extreme pressure (250+ atmospheres) raises the boiling point far above 100 °C. Vent fields can sustain ecosystems for thousands of years. Some scientists believe hydrothermal vents may have been the birthplace of life on Earth, and similar vents could exist on Jupiter's moon Europa beneath its icy shell.
This simulation models a black smoker hydrothermal vent: superheated, mineral-laden fluid erupting from an ocean-floor chimney into near-freezing seawater. Each emitted particle carries a temperature that decays over time, and its vertical velocity is driven by a simple buoyancy model — hotter fluid accelerates upward, cooling fluid loses lift and drifts with the ambient current. Mineral content darkens the plume as sulphide particles precipitate on contact with cold water, while chemosynthetic tubeworm colonies sway at the vent base, standing in for the ecosystem these vents support without sunlight.
Thousands of short-lived particles are spawned at the chimney mouth with an initial upward velocity proportional to vent temperature and flow rate. Each frame their buoyancy (temperature minus ambient 2°C, divided by vent temperature) reduces as they cool, so the plume decelerates, spreads and eventually dissipates — the same physics that limits real hydrothermal plumes to roughly a few hundred metres of rise before they spread laterally as a neutrally buoyant layer.
Drag Vent Temperature (150–450°C) to change how fast particles rise and how high the plume reaches. Flow Rate sets how many particles are emitted per second. Mineral Content darkens the plume colour (more dissolved sulphides). Ambient Current adds sideways drift, bending the plume like a real deep-sea current. Toggle Tubeworm colonies and the Temperature overlay to change what's rendered on the canvas.
The first hydrothermal vents were discovered in 1977 near the Galápagos Islands at 2,500 m depth. Water there doesn't boil even above 400°C because pressure at that depth (250+ atmospheres) raises the boiling point far past 100°C. Some scientists think similar chemosynthesis-powered vents could exist under the icy shell of Jupiter's moon Europa.
A black smoker is a hydrothermal vent chimney that emits superheated, mineral-rich water at temperatures that can exceed 400°C. The dark colour comes from dissolved metal sulphides — mostly iron, copper and zinc sulphide — that precipitate into fine dark particles the instant the hot vent fluid mixes with cold seawater near 2°C. In the simulation, the Mineral Content slider directly controls how dark and opaque these particles are rendered.
Each particle spawns with an upward velocity scaled to vent temperature and flow rate, then its buoyancy is recalculated every frame as (temperature − 2°C) / vent temperature — a simplified stand-in for the real density difference between hot and cold seawater. As the particle's temperature decays toward ambient, buoyancy drops toward zero, so upward acceleration fades and the plume naturally slows, spreads and fades out, similar to how real plumes rise until they reach neutral buoyancy and spread laterally.
Sunlight never reaches the ocean floor at these depths, so vent ecosystems run on chemosynthesis instead of photosynthesis: bacteria oxidise the hydrogen sulphide dissolved in the vent fluid to generate energy, and that energy supports the entire local food web. Tubeworms host these bacteria symbiotically and have no mouth or digestive tract of their own — the simulation renders them as swaying red-tipped structures clustered near the warm chimney base, which is where the dissolved sulphide concentration is highest.
Boiling point rises with pressure, and at 2,500 m depth the surrounding water pressure exceeds 250 atmospheres. That raises the boiling point of seawater to well above 400°C, so vent fluid stays liquid even at temperatures that would instantly flash to steam at the surface. This is the same physical principle used in industrial pressure cookers and supercritical steam boilers, just at a much larger and colder-surrounding scale.
Flow Rate scales both the number of particles emitted per second and their initial upward speed, directly controlling how dense and fast-rising the plume looks. Ambient Current adds a constant sideways acceleration to every particle in the direction of the current, plus a small random turbulent jitter each frame, which bends the whole plume downstream the way a real deep-sea current bends a black smoker's rising column of fluid.