Bob Smith Posted August 18, 2010 Share Posted August 18, 2010 I have been using React (Release 8.05 build 3829) to model a continuously stirred tank reactor (CSTR) using the “flush” option and have discovered the “cutoff” option does not work as I expected. I have run a set of simulation with react .05 kg/day of Br-, cutoff = .1 kg and time start = 0 days, end = 7 days time start = 0 days, end = 14 days time start = 0 days, end = 21 days for these three cases the total amount of Br- reacted from the React_output.txt files is 350, 700, and 1050 g, respectively. First, all these values exceed the 0.1 kg (100 g) “cutoff” and second there is a linear coupling between “cutoff” and the length of the simulation. One of the input files is attached however I find this behavior in all the simulations that I have tried. Thanks Bob Smith 100818_Tracer.rea Quote Link to comment Share on other sites More sharing options...
Tom Meuzelaar Posted August 18, 2010 Share Posted August 18, 2010 react .05 kg/day of Br-, cutoff = .1 kg Hi Bob: The cutoff command does not support arguments beyond a numerical value- just constrain the variable in terms of the same units carried for the reactant. I hope that helps, Tom Meuzelaar RockWare, Inc. Quote Link to comment Share on other sites More sharing options...
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