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Re: Tuning diffusion coefficients for water isotopes
@Eric Sonnenthal Thanks for the update, Eric. I gather this is a significant investment of your time+efforts and appreciate it.
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Re: Tuning diffusion coefficients for water isotopes
@Eric Sonnenthal Hi Eric, Did you have any success in getting the mass balance of water isotopes "dissolved" in H2O to work at RH less than 1.0? Definitely interested in chatting about how to make…
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Re: Tuning diffusion coefficients for water isotopes
@Eric Sonnenthal Hi Eric, Thanks for giving this your attention - it’s been very insightful. I’m with you on the mass balance for the isotopes being an issue with how we’ve input the isotopologues…
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Re: Tuning diffusion coefficients for water isotopes
@Eric Sonnenthal For your second comment: I don’t completely follow the decrease by a factor of X – are you comparing the decrease in liquid saturation between the top soil grid block and the…
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Re: Tuning diffusion coefficients for water isotopes
I think the first thing is that the molecular diffusion coefficients for the isotopologues in the gas phase are correct. I do not think the diffusion coefficients should be tuned.…
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Tuning diffusion coefficients for water isotopes

Hi @Eric Sonnenthal I have a few questions about modeling diffusion for water isotopologues in an evaporating soil. Basically, the setup (following Singleton et al.…
- Tyler_Huth.1
- 3 yrs ago
- 11replies
- 116
- TOUGHREACT
Re: Issue modeling a soil with zone of unsaturated vapor
@kenny Thanks for your thoughts. Your comment on turning diffusion off got me to look at the input again and I discovered that turning diffusion on/off (MULTI block, NB=6 or 8) did nothing.…
- Tyler_Huth.1
- 3 yrs ago
- TOUGHREACT
- Reported - view
Issue modeling a soil with zone of unsaturated vapor

Hi, I am using EOS3 to model a evaporating soil and have encountered some behavior with soil air relative humidity that I think is unrealistic. My 1D setup has a static block at the bottom to act as…
- Tyler_Huth.1
- 3 yrs ago
- 2replies
- 73
- TOUGHREACT

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