[CIG-MC] Two-phase dynamics at EGU 2010

Sue Kientz sue at geodynamics.org
Thu Dec 10 09:00:54 PST 2009

Dear Colleague,

Chloé Michaut, Ondr(ej Šrámek, and I are convening a session at the EGU 
2010 General Assembly that we think may interest you. We encourage you 
to submit an abstract, and to forward this email others who may be 

European Geosciences Union General Assembly
Vienna, Austria, 02--07 May 2010
*GD1.4 -- Two-phase dynamics of the crust, mantle, and core 
Abstract deadline: 18 January 2010

The present chemical structure of the Earth and other terrestrial bodies 
is the result of segregation of material phases into chemically distinct 
but interacting layers. Magma formed in the mantle percolates upward and 
is delivered to the crust. Shortly after accretion, iron sank inward to 
form the core. Within magma chambers and at the boundaries of the outer 
core, crystalline mushy layers may form, leaving distinct chemical and 
structural signatures. Two-phase flows are also frequent at the Earth's 
surface, as gas and liquid interact with rocks, ice and magmas.

The dynamics of these processes are typically modeled using two-phase 
flow theory, in which a continuum composed of two interpenetrating, 
immiscible fluids of different viscosities react dynamically to stresses 
within and between phases. Thermal, mechanical and chemical interactions 
between phases lead to complex, nonlinear behavior.

Two-phase models can be used to explain observed features of the Earth 
and planets and can provide insight into processes occurring at depths 
inaccessible to direct observation. For this session, we encourage 
contributions concerning applications of two-phase flow theory to 
hydrothermal, cryospheric, magmatic, and core dynamics. We welcome 
discussion of theoretical and computational advances, as well as 
comparison of model results with observations.

Confirmed presenters:

Yasuko Takei (Division of Mechanics, Earthquake Research Institute, 
Tokyo). Yasuko has made important contributions to the theory of 
two-phase flow in partially molten aggregates, particularly in deriving 
expressions for anisotropic viscosity. She has also conducted laboratory 
experiments on partially molten rock analogues to better constrain 
grain-scale interactions of melt and solid.

Jerome Neufeld (Institute for Theoretical Geophysics, University of 
Cambridge, UK). Jerome has studied the dynamics of mushy layers, melting 
of icicles, and sequestration of CO2 in his recent work, which combines 
equal parts theory and experiment. http://www.damtp.cam.ac.uk/user/jneufeld/

Best wishes,

Richard Katz, Chloé Michaut & Ondr(ej Šrámek (conveners)

Richard Foa Katz
RCUK Academic Fellow, Univ Oxford
http://www.earth.ox.ac.uk/~richardk <http://www.earth.ox.ac.uk/%7Erichardk>

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