I haven't done it, but Tony Appelo describes how to set up radial problems for PHREEQM in his book, Geochemistry groundwater and pollution (Balkema, he is working on a second edition). The same approach applies to PHREEQC. I think all you really have to do is define cell lengths that decrease with distance by the appropriate amount. From p. 423: length(1) = R/ncell^.5, where length(1) is the length of the first cell, ncell is the number of cells you want to use, and R is the maximum radial distance. length(n) = length(1)(n^.5 - (n-1)^.5), for cell n. He gives an example on pager 437. If you have problems, he can probably help you better than I (appt@xxxxxxxxx). David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled J Sam Arey <arey@xxxxxxx> To: dlpark@xxxxxxxx cc: 05/19/03 10:40 PM Subject: PHREEQ Dear David, I'm very interested to know if any version of PHREEQ is currently set up to perform 1-d radial transport calculations, for either a spherically or cylindrically symmetric system. Thanks - Sam Arey -------------- 48-336 ph 617 253 3897 Dept of Civil and Environmental Engineering fax 617 253 7475 Massachusetts Institute of Technology Cambridge, MA 02139 USA
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