PhreeqcUsers Discussion Forum

Processes => Reactive transport modelling => Topic started by: rconway91 on January 08, 2018, 02:11:57 AM

Title: Does anyone still use PHT3D?
Post by: rconway91 on January 08, 2018, 02:11:57 AM
Hello, I am starting a study which will require 3D reactive transport modeling. I have been mostly looking at PHT3D, but I find that most of the links on the site are broken and nothing has been updated in years. Is PHT3D still used by anyone? Are there better options? Is PHAST better?
Thanks
Title: Re: Does anyone still use PHT3D?
Post by: dlparkhurst on January 10, 2018, 12:02:42 AM
PHT3D is still being used.

Is PHAST better? Depends. PHT3D is built on MODFLOW and MT3DMS, so if you have a flow model in MODFLOW, PHT3D may be the better choice. I admit I do not know all the flow and reaction capabilities for PHT3D, but I think they are similar to PHAST. There may some unsaturated zone capabilities in MODFLOW, and other possibilities.

PHAST is good for what it does: single density, constant temperature confined or unconfined flow. The connection to PHREEQC is straightforward; it uses a pure PHREEQC input file. Also, I think the 3D interface of Scott Charlton (Phast4Windows) is beautiful.

As a note, soon we will release VS2DRT, which is an expansion of VS2DT and VS2DH and incorporates PHREEQC (PhreeqcRM) for reactions. There is a complete interface VS2DRTI for developing models, running simulations, and viewing results. It is a 2D model that incorporates unsaturated flow  and optionally heat transport and geochemical reactions. It does not include variable density.
Title: Re: Does anyone still use PHT3D?
Post by: rconway91 on January 16, 2018, 01:55:50 AM
The flow model is in MODFLOW and I have experience in MODFLOW. Looking at the MT3DMS documentation, the program is pretty friendly towards MODFLOW users. I will give PHT3D a go.
Title: Re: Does anyone still use PHT3D?
Post by: brathi on August 27, 2018, 12:08:16 PM
In case you are still interested in PHT3D, group of Henning Prommer (the original developer of PHT3D) has published a number of studies in recent years. You can use a graphical interface ORTI3D which has PHT3D incorporated along with MODFLOW and MT3DMS (http://numineo.fr/technologie/outils-de-modelisation/ (http://numineo.fr/technologie/outils-de-modelisation/))
Title: Re: Does anyone still use PHT3D?
Post by: Rasmus on August 30, 2018, 08:20:46 PM
One major advantage in using PHAST is that it runs in parallel very efficiently (and out of the box) - which is often necessary for modelling reactive transport with a complex (natural) chemistry....