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Record Search Query:

Conflow: A numerical program for conduit flow and thermodynamics
Entry ID: USGS_CONFLOW

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Summary

Abstract: Conflow is a model that calculates flow properties (pressure, vesicularity, and
some 35 other parameters) as a function of vertical position within a volcanic
conduit during a steady-state eruption. The model idealizes the magma-gas
mixture as a single homogeneous fluid and calculates gas exsolution under the
assumption of equilibrium conditions. These are the same assumptions on which
classic conduit models (e.g. Wilson and Head, 1981) have been based. They are
most appropriate when applied to eruptions of rapidly ascending magma (basaltic
lava-fountain eruptions, and Plinian or sub-Plinian eruptions of intermediate
or silicic magmas) that contains abundant nucleation sites (microlites, for
example) for bubble growth.

The program runs on Windows-based PCs running Windows 95 or later.

Description: Executable Conflow program for Windows 95/98/NT/XP may be downloaded from this
URL.

Link: VIEW RELATED INFORMATION

Description: USGS Open-File Report 00209 on Conflow. A full report in PDF may be accessed
from this URL. Users may also download an executable version of the program
from this site as well as the Fortran source code.

Multimedia Sample

View full image

Caption Description: Conflow screen shot

Service Citation

Originators: Larry G. Mastin and Mark S. Ghiorso
Title: A Numerical Program for Steady-State Flow of Magma-Gas Mixtures Through Vertical Eruptive Conduits
Provider: U.S. Geological Survey
URL: http://vulcan.wr.usgs.gov/Projects/Mastin/Publications/OFR00-209/fr...

Service Keywords

MODELS >GEOLOGIC/TECTONIC/PALEOCLIMATE MODELS

Science Keywords

SOLID EARTH >TECTONICS >VOLCANIC ACTIVITY >ERUPTION DYNAMICS

ISO Topic Category

GEOSCIENTIFIC INFORMATION

Access Constraints No constraints

Use Constraints Please cite service providers, Larry G. Mastin (USGS) and Mark S. Ghiorso
(University of Washington).

Ancillary Keywords

VOLCANOES
VOLCANIC CONDUITS

Service Provider

DOI/USGS/GD/VHP/CVO > Cascades Volcano Observatory, Volcano Hazards Program, Geological Division, U.S. Geological Survey, U.S. Department of the Interior

Service Organization URL: http://vulcan.wr.usgs.gov/

Service Provider Personnel
Name: LARRY G. MASTIN Phone: (360) 993-8925 Fax: (360) 993-8980 Email: lgmastin at usgs.gov Contact Address: Cascades Volcano Observatory USGS 1300 SE Cardinal Court, Bldg. 10, Suite 100 City: Vancouver Province or State: Washington Postal Code: 98683 Country: USA

Distribution Media

Distribution_Media: Online (HTTP)
Distribution_Size: 2.5 Mbytes
Distribution_Format: Executable program for Windows 95/98/NT
Fees: None

Personnel

LARRY G. MASTIN
Role: TECHNICAL CONTACT
Phone: (360) 993-8925
Fax: (360) 993-8980
Email: lgmastin at usgs.gov
Contact Address:
Cascades Volcano Observatory
USGS
1300 SE Cardinal Court, Bldg. 10, Suite 100
City: Vancouver
Province or State: Washington
Postal Code: 98683
Country: USA

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

Publications/References

Mastin, L. G. and M. S. Ghiorso, 2000, A Numerical Program for Steady-State
Flow of Magma-Gas Mixtures Through Vertical Eruptive Conduits: U.S. Geological
Survey Open-File Report 00209,
&http://vulcan.wr.usgs.gov/Projects/Mastin/Publications/OFR00-209/fr...
l&.

Creation and Review Dates

SERF Creation Date: 2004-05-11
SERF Last Revision Date: 2007-11-19
Future SERF Review Date: 2005-05-11

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