HISTORY OF HYDROTHERM PROGRAMS (Status as of 01 March 2008)

Version 3.1.0 is released:

Initial release of version 3 of the HYDROTHERM and HYDROTHERM INTERACTIVE programs.

Documentation of Version 3 is released as a pdf file (March 2008):

Guide to the Revised Ground-Water Flow and Heat Transport Simulator: HYDROTHERM -- Version 3
by Kenneth L. Kipp, Jr., Paul A. Hsieh, and Scott R. Charlton
U.S. Geological Survey
Techniques and Methods 6-A25, 160 p.

Version 2.2 is released (Jun 1997):

Modifications include an improved upstream weighting routine that eliminates previous convergence problems that occurred as the saturation of a phase approached its residual saturation and the phase became immobile. The Newton-Raphson convergence criteria were also modified. See the "Dev_hist" file included with this distribution for a more detailed description of the modifications.

Version 2.1 is released (Jan 1997):

Incorporates a new method for defining the problem domain and the distribution of rock properties; all rock properties can vary in space by rock type and as functions of temperature; parameter values may be input with a choice of units of measure (SI, cgs, etc.); comment lines may be used in the input file; a new menu-oriented visualization program, HTgnu, is provided which displays HYDROTHERM output using the public-domain graphics program Gnuplot. The modifications made since the release of Version 1.1 are described in the "Dev_hist" file and in the documentation included with this distribution.

Version 1.2 is released (Dec 1994):

Added three new options for defining initial temperature distributions, added a new shell script named MakeHT to compile HYDROTHERM, added version control, included an interface to the Silicon Graphics visualization program Explorer, and introduced a new method for calculating fluid density and viscosity between nodes. These modifications made since the release of Version 1.1 are described in a two-page flyer dated December 27, 1994.

Version 1.1 is released (1994):

Documentation: The computer model HYDROTHERM, A three-dimensional finite-difference model to simulate ground-water flow and heat transport in the temperature range of 0 to 1,200 °C: by D.O. Hayba and S.E. Ingebritsen, U.S. Geological Survey Water-Resources Investigations Report 94-4045, 1994, 85 p.