PetraSim – A shallow geothermal model with pipe flow

February 3, 2014

We recently had a customer request for some help with a shallow geothermal model. I thought it would be interesting to show one approach to simulating fluid flow in tubes (pipes) with heat conduction into the surrounding soil.

When I first saw this problem, I thought that PetraSim (TOUGH2) might not be the best code for the solution. The pipe geometry would need to be approximated and if conduction is the dominant mechanism in the soil, there might be other codes that could do a good job. However, PetraSim (TOUGH2) does offer some unique advantages to simulate complex heat transfer in the soil, including the potential heat transport due to groundwater flow.


PetraSim 5.3.1203

December 3, 2013

This is a maintenance releaseĀ of PetraSim 5. This version adds support for two new equation of state modules: EOS7C, ECO2M.


Support for EOS7C Added

October 12, 2012
PetraSim now supports EOS7C, a TOUGH2 module for methane-carbon dioxide or methane-nitrogen gas mixtures. Applications include subsurface geologic carbon sequestration sites and natural gas reservoirs. The components modeled include water, brine, non-condensible gas (CO2 or N2), gas tracer, methane, and heat. If you want to be a beta tester, please contact Alison Alcott at RockWare (  Read More...

PetraSim 5.2.0611

June 11, 2012

This is a maintenance release of PetraSim 5. This version includes changes to the selection model and bug fixes to improve stability.


PetraSim 5.1.2030

August 30, 2011

This release includes a workaround for a bug in the way TOUGH2’s EOS9 module processes the ROCKS card when searching for REFCO.


PetraSim 5.1.1928

July 28, 2011

This release includes several bug fixes and enhancements for the PetraSim user interface.


PetraSim 5.1.1802

June 2, 2011
This release includes bug fixes and enhancements for the TOUGH2 and TOUGH2-MP simulators. Changes since PetraSim 5.1.1710 include: Fixed a bug in TOUGH2 that caused an access violation in models that used more than 4/5 of the maximum number of sources and sinks. Updated TOUGH2 binaries to have a limit of 50,000 sources/sinks and 1 million source/sink history ... Read More...

PetraSim 5.1.1710

May 10, 2011

This release includes several fixes to the TOUGH-MP executables included with PetraSim.


PetraSim 5.1.1621

April 21, 2011

This release is a patch that prevents problems related to the latest ATI graphics card driver and PetraSim’s use of textures (e.g. top images).


PetraSim 5.1.1605

April 5, 2011

This release fixes two bugs related to the new flux-based boundary condition specification options.