John Seach, Volcano Live

 Two-Phase Flow Regimes - John Seach

Four types of magma eruption are identified.

Bubbly Flow Small volume of gas are carried along with the magma. Example is lava extruding from a vent.
Slug Flow Gas pockets form in the magma. Example is strombolian eruptions where gas pockets burst at the top of the conduit.
Annular Flow A central gas core is surrounded by a thick film of liquid on the conduit walls. Example is a lava fountain.
Dispersed flow This results when magma fragments are carried in a gas phase.
Example is plinian eruptions and pyroclastic flows.



Two-Phase Flow Regimes
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