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Wenyu Zhou
,
Hammond, Glenn E
3
Feb 25
Permeability power and equations mistake in user guide website
Dear Glenn, Thanks for your kind reply! Actually, my major concern is that the porosity-permeability
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Permeability power and equations mistake in user guide website
Dear Glenn, Thanks for your kind reply! Actually, my major concern is that the porosity-permeability
Feb 25
reisi...@gmail.com
,
Hammond, Glenn E
7
Feb 24
Fracture Modeling
Thank you very much Glenn. On Tue, Feb 24, 2026 at 9:00 PM 'Hammond, Glenn E' via pflotran-
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Fracture Modeling
Thank you very much Glenn. On Tue, Feb 24, 2026 at 9:00 PM 'Hammond, Glenn E' via pflotran-
Feb 24
Orlando Silva Rojas
,
Hammond, Glenn E
5
Feb 24
Starting a model from separate flow and transport restart files
Orlando, While the keywords INITIALIZE_FLOW_FROM_FILE and INITIALIZE_TRANSPORT_FROM_FILE are still
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Starting a model from separate flow and transport restart files
Orlando, While the keywords INITIALIZE_FLOW_FROM_FILE and INITIALIZE_TRANSPORT_FROM_FILE are still
Feb 24
Won Woo Yoon
,
Hammond, Glenn E
4
Feb 23
pH error in OSRT
Won Woo, I apologize for responding earlier. You are correct that the truncation is incorrect for
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pH error in OSRT
Won Woo, I apologize for responding earlier. You are correct that the truncation is incorrect for
Feb 23
Bisesh Joshi
,
Hammond, Glenn E
4
Feb 23
O2(g) diffusion inhibiting SOM mineralization in Richards Mode
Hi Glenn, Thanks for your reply. Here, I have attached my input file and its dependencies for you
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O2(g) diffusion inhibiting SOM mineralization in Richards Mode
Hi Glenn, Thanks for your reply. Here, I have attached my input file and its dependencies for you
Feb 23
Isaac Prud'homme
,
Peter Lichtner
6
Feb 23
Infinite Concentration Error while making a Pyrite Precipitation Model
Could you explain what originally caused the infinite concentration error? I'm interested in
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Infinite Concentration Error while making a Pyrite Precipitation Model
Could you explain what originally caused the infinite concentration error? I'm interested in
Feb 23
Zhongkang Yan
,
Hammond, Glenn E
2
Feb 10
Inquiry on the status and usability of PFLOTRAN particle transport models (straining/blocking) and availability of a latest PDF user manual
Zhongkang, Although this capability is documented in the report below, it is still under development
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Inquiry on the status and usability of PFLOTRAN particle transport models (straining/blocking) and availability of a latest PDF user manual
Zhongkang, Although this capability is documented in the report below, it is still under development
Feb 10
Bisesh Joshi
,
Hammond, Glenn E
2
Feb 5
ERROR: Error with GENERAL_MODE phase boundary condition: Missing dof.
Bisesh, I suspect it is the “recharge” (I prefer MASS_RATE over VOLUMETRIC_RATE for multiphase) or “
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ERROR: Error with GENERAL_MODE phase boundary condition: Missing dof.
Bisesh, I suspect it is the “recharge” (I prefer MASS_RATE over VOLUMETRIC_RATE for multiphase) or “
Feb 5
Bisesh Joshi
,
Hammond, Glenn E
5
Feb 2
Question about multiple boundary at top surface layers
Thanks for your invaluable suggestion, Glenn. I will use seepage BC. On Mon, Feb 2, 2026 at 4:50 PM
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Question about multiple boundary at top surface layers
Thanks for your invaluable suggestion, Glenn. I will use seepage BC. On Mon, Feb 2, 2026 at 4:50 PM
Feb 2
平田光一
,
Hammond, Glenn E
2
Jan 26
Question about Using “RESTART” in PFLOTRAN for Mineral Dissolution
Koichi, You can overwrite the primary species concentrations in the solution vector in the restart
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Question about Using “RESTART” in PFLOTRAN for Mineral Dissolution
Koichi, You can overwrite the primary species concentrations in the solution vector in the restart
Jan 26
Bisesh Joshi
, …
Sam Shaheen
4
Jan 22
Using temperature time-series data for changing microbial rate constant based on Q10 coefficients in PFLOTRAN
Thanks for the response, Glenn. I was looking for a method to incorporate temperature effects on
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Using temperature time-series data for changing microbial rate constant based on Q10 coefficients in PFLOTRAN
Thanks for the response, Glenn. I was looking for a method to incorporate temperature effects on
Jan 22
chenyao su
, …
Michael Nole
7
Jan 18
what is the difference between the MPHASE and SCO2 modes
Thank you very much for the clarification and for taking the time to answer my questions. This was
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what is the difference between the MPHASE and SCO2 modes
Thank you very much for the clarification and for taking the time to answer my questions. This was
Jan 18
Won Woo Yoon
,
Hammond, Glenn E
2
Jan 6
Effect of grid size on diffusion in heterogeneous media
Won Woo, I apologize or the late response. I left on vacation on Dec 13 and returned yesterday. There
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Effect of grid size on diffusion in heterogeneous media
Won Woo, I apologize or the late response. I left on vacation on Dec 13 and returned yesterday. There
Jan 6
chenyao su
Jan 6
On the issue of mode selection for CO2 sequestration simulation
Hello everyone! When I was simulating CO2 geological storage, I found that there are many options for
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On the issue of mode selection for CO2 sequestration simulation
Hello everyone! When I was simulating CO2 geological storage, I found that there are many options for
Jan 6
Anne Schulz
,
Hammond, Glenn E
2
Jan 5
Radiogenic heat production
Anne, See my comments in red below. Glenn From: pflotra...@googlegroups.com <pflotran-users@
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Radiogenic heat production
Anne, See my comments in red below. Glenn From: pflotra...@googlegroups.com <pflotran-users@
Jan 5
Bisesh Joshi
, …
Hammond, Glenn E
12
12/8/25
Model error regarding maximum time step exceeded
Hi Glenn, It worked now. I have restarted computer and have increased the maximum timestep to 10 day.
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Model error regarding maximum time step exceeded
Hi Glenn, It worked now. I have restarted computer and have increased the maximum timestep to 10 day.
12/8/25
Hammond, Glenn E
11/18/25
PFLOTRAN on NERSC
All, For those utilizing PFLOTRAN on NERSC's Perlmutter supercomputer, you have the option to
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PFLOTRAN on NERSC
All, For those utilizing PFLOTRAN on NERSC's Perlmutter supercomputer, you have the option to
11/18/25
Bisesh Joshi
,
Hammond, Glenn E
2
11/13/25
Error in simulation when restarting from h5 file
Bisesh, PFLOTRAN checkpoint files usually end with [*-ts#.h5, *-#.###y.h5, *-restart.h5]. It is
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Error in simulation when restarting from h5 file
Bisesh, PFLOTRAN checkpoint files usually end with [*-ts#.h5, *-#.###y.h5, *-restart.h5]. It is
11/13/25
Hammond, Glenn E
,
Peter Lichtner
2
11/4/25
Reaction Species Finder
It turns out that Ettringite* is in the minskip.dat file which is why it wasn't found! Peter On
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Reaction Species Finder
It turns out that Ettringite* is in the minskip.dat file which is why it wasn't found! Peter On
11/4/25
Bisesh Joshi
,
Hammond, Glenn E
15
11/3/25
Model insensetive when running pflotran from 2000 yr checkpoint file
Thanks for the timely reply, Glenn. I'm trying to simulate the kinetic reaction of the
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Model insensetive when running pflotran from 2000 yr checkpoint file
Thanks for the timely reply, Glenn. I'm trying to simulate the kinetic reaction of the
11/3/25
Hammond, Glenn E
, …
Girish Kumar
6
10/31/25
Re: Simulating headspace for a batch reactor system
When a uniform velocity is imposed on a grid, it is applied to all internal connections as well as
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Re: Simulating headspace for a batch reactor system
When a uniform velocity is imposed on a grid, it is applied to all internal connections as well as
10/31/25
reisi...@gmail.com
,
Hammond, Glenn E
2
10/20/25
Timestep Error
Fatemeh, Try increasing the maximum number of time steps using the MAXIMUM_NUMBER_OF_TIMESTEPS card.
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Timestep Error
Fatemeh, Try increasing the maximum number of time steps using the MAXIMUM_NUMBER_OF_TIMESTEPS card.
10/20/25
pedram mahzari
,
Hammond, Glenn E
3
10/17/25
PETSC v3.24.0
Yes. I need to update the development version of the documentation to reference PETSc 3.24. PFLOTRAN
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PETSC v3.24.0
Yes. I need to update the development version of the documentation to reference PETSc 3.24. PFLOTRAN
10/17/25
毎熊康平
,
Hammond, Glenn E
2
10/17/25
PFLOTRAN Question: ERROR: concentration condition null for CO₂ Dissolution-Convection Simulation
Kohei, Peter can correct me if I am wrong, but MPHASE does not consider transport of NaCl within the
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PFLOTRAN Question: ERROR: concentration condition null for CO₂ Dissolution-Convection Simulation
Kohei, Peter can correct me if I am wrong, but MPHASE does not consider transport of NaCl within the
10/17/25
reisi...@gmail.com
, …
Hammond, Glenn E
50
10/16/25
Simulation failes
Thank you Glenn, I will try this! Regards, Fatemeh On Wed, Oct 15, 2025 at 01:29 'Hammond, Glenn
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Simulation failes
Thank you Glenn, I will try this! Regards, Fatemeh On Wed, Oct 15, 2025 at 01:29 'Hammond, Glenn
10/16/25
Kenton Wu
,
Hammond, Glenn E
6
10/14/25
Extraction well sanity check
Kenton, My apologies for the (month) delayed response. Your schematic is helpful. You list the domain
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Extraction well sanity check
Kenton, My apologies for the (month) delayed response. Your schematic is helpful. You list the domain
10/14/25
Zhongkang Yan
,
Hammond, Glenn E
4
10/14/25
Guidance for further study
Zhongkang, If you don't have a specific site or problem to focus on, I suggest spending time
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Guidance for further study
Zhongkang, If you don't have a specific site or problem to focus on, I suggest spending time
10/14/25
reisi...@gmail.com
, …
Hammond, Glenn E
11
10/14/25
Fugacity
Peter, I believe that you can use a dataset for the double precision number associated with any of
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Fugacity
Peter, I believe that you can use a dataset for the double precision number associated with any of
10/14/25
Hammond, Glenn E
,
reisi...@gmail.com
2
10/8/25
Request for PFLOTRAN Simulation Graphics
Dear Glenn, I would be happy to share my results for your presentation. However, I need to obtain my
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Request for PFLOTRAN Simulation Graphics
Dear Glenn, I would be happy to share my results for your presentation. However, I need to obtain my
10/8/25
Kewei Chen
,
Hammond, Glenn E
3
9/26/25
modify solute concentration in the checkpoint file
Thanks, Glenn! I will check it. Best, Kewei On Friday, September 26, 2025 at 12:50:34 AM UTC-4
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modify solute concentration in the checkpoint file
Thanks, Glenn! I will check it. Best, Kewei On Friday, September 26, 2025 at 12:50:34 AM UTC-4
9/26/25