[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Minor Bug or Artificial Intelligence Feature in PHAST: 3D Reactive-TransportModel

> Unintentionally I had left a 1 (forgot to edit it) for the
-HDF_chemistry PRINT_FREQUENCY, though my intention was to set a
-delta_time to 5 seconds (except for the first 10 seconds). What
happened is that PHAST chose to use 1 second as -delta_time. In
principle the safe choice in terms of not missing anything - but it did
increase the simulation time considerably and it also meant that the
output was rather large.

That is a "feature", not a bug. It is the way the print control was
designed; the idea was that if you have 10 second time steps and want a
printout after 25 seconds, the step size would be adjusted to match the
desired print frequency.  I suppose we could put out a warning that a print
frequency is smaller than the step size.



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

Project Home Page
Complete Water Resources Division Software
USGS Home Page
Water Resources Division Home Page
NRP Home Page
Help Page
USGS Privacy Statement       

Please note that some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented prior to final review and approval by the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the sole responsibility of the user.

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. 

The URL of this page is: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/mail/msg00610.html
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 2444 since Jan 22, 1998.