Revision History for Open-file 00-209 Mastin, L. G., and Ghiorso, M. S., 2000 A numerical program for steady-state flow of magma-gas mixtures through vertical eruptive conduits ----------------------------------------------------- Version 1.0.0 Posted October, 2000 ----------------------------------------------------- Version 1.0.1, February 2, 2001. i. Added the best-fit equation “wt%H2O = s*p^beta”, with values for s and beta shown on the water solubility page (suggested by Giovanni Macedonio) ii. Added a label to the water solubility page giving the water solubility at the specified pressure. ----------------------------------------------------- Version 1.0.2 i. Modified Kilauean melt chemistry to conform to Kilauea standard BHV01, as suggested by Carl Thornber. Also revised the “more info” page to explain the source for Kilauean chemistry. (February 8, 2001) ii. Changed crystallinity of Mount St. Helens melt to 40%, and basal pressure for Mount St. Helens magma to 220 MPa, as reported by Rutherford et al., (1985). Also revised the “More info” page to explain the source for Mount St. Helens parameters. (February 8, 2001) iii. Corrected a glitch in calculations of sound speed and bulk modulus of the mixture. Old sound speeds were isothermal (oops) and bulk modulus calculations weighted the phases by their mass fractions rather than by volume fractions. (February 22, 2001) iv. Found and corrected a bug in the dynamic link libraries that calculate thermodynamic properties and solubility. The bug was calculating the average molecular weight of the melt that were on the order of 1% off from the true values. This error in turn produced slightly erroneous values of all thermodynamic parameters, because those parameters were converted from per-mole to per-kilogram values. The bug was fixed in the files “thermo.dll”, “solub.dll”, and the main conduit program, “confort.exe”. (February 22, 2001) ----------------------------------------------------- Version 1.0.3 i. Added an “options” menu to the conduit page that allows users to specify which fragmentation criterion to use. If users choose a threshold volume fraction gas, they can specify the exact volume fraction gas to use as the threshold. ----------------------------------------------------- Version 1.0.4 i. Formatted input values written ton “conin.txt” so that decimal points are used, even on European operating systems. • Version 1.0.5 (October 2006) i. Corrected a miscalculation in the bulk modulus of the melt, shown in the Thermodynamic Properties window. Earlier versions of the model showed this property to be an order of magnitude too large. ----------------------------------------------------- Version 1.0.5b (April, 2008) i. The last posting of this version left out a critical file, dfortt.dll, which caused the program to crash when thermodynamic functions were called. This posting fixes the problem. ----------------------------------------------------- Version 1.0.5c (November, 2013) i. Files were moved from CVO server to publications server http://pubs.usgs.gov/of/2000/0209/