Reza_Kh_92

Hi Jia, Thanks for your reply and suggestions. They are definitely helpful. For Wollastonite, I am trying to use another kinetic rate law to see if it fits the model. Regards, Reza

Hello there, Can anyone help with figuring out what is wrong with my reactive transport modeling work; I get the known error of “Newton-Raphson didn't converge after 999 iterations, max residual = 5.63e-11, Xi = 0.0102 Newton failed at node 0”? I am trying to simulate weathering in soil with the weathering example (chapter 27.2 in the book) as the benchmark. The main difference is adding a silicate mineral (wollastonite) to see the effect on soil and leachate as well as calcite precipitation. Also, for the kinetic rates of minerals, I used the data reported in Palandri et al. I have attached my file, and I am using V8.R6+ thermo data set. I would appreciate it if you could please guide me. Thanks, Reza Weathering in soil.x1t

Hello, I’m trying to model mineral dissolution/precipitation in a natural setting for a long time (e.g., 10 years) using react module of GWB. Since the temperature and rainfall fluctuate significantly in the environment, it doesn’t make sense to assume constant temperature and water content in the system for the period of simulation. So, I came with the idea of dividing the model to small steps (e.g., 1 day), pickup the result from the previous step, and define the new temperature and water content for the system. (See the attached file, it’s an example form of inputs for ten days of simulation). As it will be almost impossible to extend such command lines for ten years, I am thinking of running the model using the GWB plugin in python (defining new temperature and water content for each step from an excel file). I execute the script examples successfully on python. However, I have some difficulties writing the script for my simulation in python. Below are some challenges I’m facing now: 1)using pickup command in python script. As I checked the manual reference of GWB, there was no discussion on using pickup the system and using it as the input for the next step of modeling in coding environments. 2)(which is also related to No.1) I wonder if I can retrieve the results from each step and save them (or part of them) in a text or excel file. 3) I noticed when I run a model using a costume rate law (defined in script) like the one specified in the attached file, the python plugin cannot read it and return an error. I would appreciate it if you could help me with solving these problems. Regards, Rezatest.rea