Jump to content
Geochemist's Workbench Support Forum

Andrew L

Members
  • Posts

    4
  • Joined

  • Last visited

Everything posted by Andrew L

  1. Brian, What is the purpose of the phrase "RETURN rate?" I can get the model to run with or without this phrase, but it provides different results. Should I be including the phrase "RETURN rate" when using the script dialog option? Thanks in advance for your help!
  2. Thank you for your help, Brian. Either of the changes that you suggested seem reasonable. I hadn't thought too much about the specifics of the model; I was just trying to get it to run. I believe all of the other terms are correct. Thanks again.
  3. I tried to write the rate law as a script directly into the input file. I included the values of R, T, n, and KT directly into the script and assigned the values of k and Ea in the GUI. I also multiplied the rate equation by the surface area (which was assigned in the GUI) and (1 - Q/K). When I try to run the model, I get an error message indicating my rate law cannot be evaluated. The model is attached, and I would appreciate help. Thanks! anorthite dissolution.rea
  4. I would like to use the labradorite dissolution rate provided in Carroll and Knauss (2005, Chemical Geology) in a kinetic model in GWB. The rate is given by r = k * 10(-Ea/(2.303RT)) * [(aH+3n/aAl3+n)KT/(1+KT(aH+3n/aAl3+n))] where the rate constant k is 10-5.69 mol cm-2 s-1, the activation energy Ea is 10.06 kcal mol-1, n is 0.31, and KT is a complex formation constant that varies with temperature. How do I incorporate this rate equation in GWB? Thanks!
×
×
  • Create New...