SoWat NaCl-H2O fluid properties
SoWat stands for Sodium chloride-Water and is a model (almost an equation of state) for the properties of fluids in the H2O-NaCl system. It was published in two parts in Geochimica et Cosmochimica Acta:
Driesner T., and Heinrich C.A. (2007): The System H2O-NaCl. I. Correlation Formulae for Phase Relations in Temperature-Pressure-Composition Space from 0 to 1000°C, 0 to 5000 bar, and 0 to 1 XNaCl. Geochimica et Cosmochimica Acta 71, 4880-4901.
Driesner T. (2007) The System H2O-NaCl. II. Correlations for molar volume, enthalpy, and isobaric heat capacity from 0 to 1000 degrees C, 1 to 5000 bar, and 0 to 1 XNaCl. Geochimica et Cosmochimica Acta 71(20), 4902-4919.
Downloads
SoWat has been implemented in three little, essentially self-explanatory programs. To download, right-click link and select "Save target as" (Internet Explorer) or "Save link as" (Firefox) to save it to your computer.
Directions and license
The programs use the "DOS" box (a.k.a. "Command prompt", typically available under "Accessories" if you click under "Start->All Programs" in the Windows OS). I strongly recommend to first start the command prompt, then navigate to the directory where you save the program and start it by typing its name on the command line (after typing the first two or three letters, you can usually use the tabulator key to let Windows auto-complete the name rather than typing the whole long name; if there are several programs and/or files that start with the same letters, repeatedly pressing the tabulator key lets your browse through the list). If you start the program by just double-clicking in Windows Explorer, it will terminate by closing its window, which you may want to avoid since you will not be able to read important information, e.g., error notifications etc. that may appear just before termination.
These are not commercial programs and are distributed "as is" without any guarantee that they compute the correct results for your problem. I appreciate a short notice by email if you detect errors, however, correcting them will be done on an irregular basis.
When using data from these programs in your papers, please cite the papers mentioned above.