Reconciling pyroclastic flow and surge: the multiphase physics of pyroclastic density currents

• Published in: Earth and planetary science letters Vol. 202; no. 2; pp. 405 - 418
• Main Authors: Burgisser, Alain, Bergantz, George W.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.09.2002; Elsevier
• Subjects: density currents; Earth Sciences; pyroclastic flows; pyroclastic surges; Sciences of the Universe; turbulence; Volcanology; density currents; pyroclastic surges; turbulence; pyroclastic flows; pyroclastic surge; pyroclastic flow; density current

Two end-member types of pyroclastic density current are commonly recognized: pyroclastic surges are dilute currents in which particles are carried in turbulent suspension and pyroclastic flows are highly concentrated flows. We provide scaling relations that unify these end-members and derive a segre...