dorsal/arxiv
View SchemaAutocatalytic chemical smoke rings
| Authors | Michael C. Rogers, Stephen W. Morris |
|---|---|
| Categories | |
| ArXiv ID | physics/0501078 |
| URL | https://arxiv.org/abs/physics/0501078 |
Abstract
Buoyant plumes, evolving free of boundary constraints, may develop well-defined mushroom shaped heads. In normal plumes, overturning flow in the head entrains less buoyant fluid from the surroundings as the head rises, robbing the plume of its driving force. We consider here a new type of plume in which the source of buoyancy is an autocatalytic chemical reaction. The reaction occurs at a sharp front which separates reactants from less dense products. In this type of plume, entrainment assists the reaction, producing new buoyancy which fuels an accelerating plume head. When the head has grown to a critical size, it detaches from the upwelling conduit, forming an accelerating, buoyant vortex ring. This vortex is analogous to a rising smoke ring. A second-generation head then develops at the point of detachment.Multiple generations of chemical vortex rings can detach from a single triggering event.
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"abstract": "Buoyant plumes, evolving free of boundary constraints, may develop\nwell-defined mushroom shaped heads. In normal plumes, overturning flow in the\nhead entrains less buoyant fluid from the surroundings as the head rises,\nrobbing the plume of its driving force. We consider here a new type of plume in\nwhich the source of buoyancy is an autocatalytic chemical reaction. The\nreaction occurs at a sharp front which separates reactants from less dense\nproducts. In this type of plume, entrainment assists the reaction, producing\nnew buoyancy which fuels an accelerating plume head. When the head has grown to\na critical size, it detaches from the upwelling conduit, forming an\naccelerating, buoyant vortex ring. This vortex is analogous to a rising smoke\nring. A second-generation head then develops at the point of\ndetachment.Multiple generations of chemical vortex rings can detach from a\nsingle triggering event.",
"arxiv_id": "physics/0501078",
"authors": [
"Michael C. Rogers",
"Stephen W. Morris"
],
"categories": [
"physics.flu-dyn",
"physics.chem-ph"
],
"title": "Autocatalytic chemical smoke rings",
"url": "https://arxiv.org/abs/physics/0501078"
},
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