Conceptual Models > Incorporation PHREEQC in programming languages

RunString vs. RunCells

(1/1)

RayTherminator:
Hello,

I would like to clarify what is happening when a PHREEQC input string is executed with RunString.

Based on my lessons learned for instances (see https://phreeqcusers.org/index.php/topic,2105.0.html), calling RunString(ID,1,0,0,Str) would execute the PHREEQC command on the workers and their respective cells.

What difference does it make calling RunCells afterwards?

Do I have to differentiate here for calling of PHREEQC reactions (for which I would need to call RunCells) versus executing a SELECTED_OUTPUT definition with RunString?

Many thanks for explanation efforts.

Best Regards,
Markus

dlparkhurst:
Do I have to differentiate here for calling of PHREEQC reactions (for which I would need to call RunCells) versus executing a SELECTED_OUTPUT definition with RunString?

Yes.

If your string is simply a SELECTED_OUTPUT definition, then RunString will add the SELECTED_OUTPUT definition for all of the cells, but no output would be generated.

If you ran RunString and then RunCells, then SELECTED_OUTPUT would be defined and then a reaction would be run in each cell that equilibrated the current solution in the cells with all of the equilibrium reactants (EQUILIBRIUM_PHASES, EXCHANGE, GAS_PHASE, SURFACE, SOLID_SOLUTIONS), and also integrate any KINETICS reactions for the current time step (RM_SetTimeStep).  RunCells would write the data defined by SELECTED_OUTPUT to file (provided the appropriate print flags are set).

If you don't run RunString, then SELECTED_OUTPUT would not be defined.




.

Navigation

[0] Message Index