Outputting total flow rates from the FORWARD option
I'm having difficulty getting iTOUGH2 running a forward simulation to output total flow rates across a defined connection using eco2n. The only way I've been able, thus far, to output flow rates is by specifying both a phase and component. Is there anything noticeably wrong about the following syntax I used in my iTOUGH2 input file, particularly the highlighted portion?
>> TIMES: 100 LOGARITHMICALLY SPACED SECONDS
>> Total FLOW rate
>>> CONNECTION: 100_1 101_1
>>>> ANNOTATION : Total Flow (kg/sec)
>>>> NO DATA
>>> solve FORWARD problem only
Again, if I specify both a phase and component in the portion in bold above, the output comes out fine. If I specify one or zero phases or components, I receive an output of 0.0 for all the times I specify, not a total rate as specified by the iTOUGH2 command index.
Your MULTI block in the forward input file hetests specifies NPH=4, which is not valid (ECO2N handles only up to 3 phases). I spare you the details of why this leads to a zero total flux in iTOUGH2 (in short: iTOUGH2 uses NPH to count the phases that need to be summed up to get the total flux).
One of these days I will implement a check on the MULTI block and print an error message if an invalid combination is used.
Hope this resolves the issue.