UNIVERSITY OF BRISTOL
Department of Earth Sciences
Wills Memorial Building
Queen's Rd., Bristol BS8 1RJ.
Phone:44-0117-954-5243
Fax:44-0117-925-3385

Lecture 1. PowerPoint PDF

• Introduction – types of volcanic eruptions and controlling parameters
• Structure of the flow in volcanic conduits for explosive and extrusive eruptions
• Physical properties of magma and volcanic systems: density, temperature, pressures, water content
• Rheology of magma, model for Newtonian liquid and non-Newtonian properties of magma.

Lecture 2. PowerPoint PDF

• Basic principles of fluid dynamic and governing equations
• Laminar flow of the liquid between parallel plates, resistance
• Bubble growth in viscous liquid: diffusion and overpressure development

Lecture 3. PowerPoint PDF

• Governing equations for multiphase flows. Continuum hypothesis
• Flow of bubbly magma in volcanic conduits
• Gas-particle dispersion flow.
• Fragmentation mechanisms.
• Models and results.
  Article: O. Melnik, Dynamics of two-phase conduit flow of high-viscosity gas- saturated magma: large variations of sustained explosive eruption intensity. Bulletin of Volcanology, 2000, v. 62, 3, p. 153-170.

Lecture 4. PowerPoint PDF

• Dynamics of magma ascent with crystallization during extrusive eruptions.
• Steady state and transient approaches.
• Cycles in eruptive activity, influence of controlling parameters.
• Case studies – Mount Sent Helens and Santiaguito.
• Conclusion remarks
  Articles: O.E. Melnik, R.S.J. Sparks, Non-linear dynamics of lava dome extrusion. Nature, 1999, v. 402, p. 37-41.
  A. Barmin, O. Melnik, R.S.J. Sparks, Periodic behavior in lava dome eruptions. Earth and Planetary Science Letters, 2002, v. 199, p. 173-184.

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