# Help & Support

**URL:** https://discourse.opengeosys.org/c/usability/8.md?page=1

[Latest](https://discourse.opengeosys.org/latest.md) · [Categories](https://discourse.opengeosys.org/categories.md) · [Tags](https://discourse.opengeosys.org/tags.md)

**Page:** 2

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## [Installing OGS - Virtual environment problem](https://discourse.opengeosys.org/t/installing-ogs-virtual-environment-problem/1743)

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**Author:** [@planetcooler](https://discourse.opengeosys.org/u/planetcooler)\
**Replies:** 6\
**Last updated:** [November 27, 2025, 9:16am UTC](https://discourse.opengeosys.org/t/installing-ogs-virtual-environment-problem/1743 "2025-11-27T09:16:32Z")

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Hi - I am trying to install OGS on a Mac - I have limited python experience. OGS says: A straightforward way of installing OGS is via Python’s pip-tool: # Optional: create a Python virtual environment, see below pytho…

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## [How to simulate CO₂ dissolution into pore water with a 2D mesh in OGS?](https://discourse.opengeosys.org/t/how-to-simulate-co-dissolution-into-pore-water-with-a-2d-mesh-in-ogs/1730)

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**Author:** [@RG001](https://discourse.opengeosys.org/u/RG001)\
**Replies:** 3\
**Last updated:** [November 21, 2025, 8:31am UTC](https://discourse.opengeosys.org/t/how-to-simulate-co-dissolution-into-pore-water-with-a-2d-mesh-in-ogs/1730 "2025-11-21T08:31:05Z")

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Hi OGS team, I would like to simulate the process of CO₂ dissolving into pore water and observe how the dissolved CO₂ front develops over time. My scenario is as follows: I use a two-dimensional mesh. At the top boun…

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## [Container with both petsc and tespy](https://discourse.opengeosys.org/t/container-with-both-petsc-and-tespy/1736)

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**Author:** [@einsor](https://discourse.opengeosys.org/u/einsor)\
**Replies:** 2\
**Last updated:** [November 20, 2025, 7:04am UTC](https://discourse.opengeosys.org/t/container-with-both-petsc-and-tespy/1736 "2025-11-20T07:04:13Z")

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I am looking for a way to run my coupled ogs-tespy project where we have a system of interconnected boreholes with a parallel solver to speed up the calculations. The official containers does not seem to support the need…

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## [Negative capillary pressure instability on the saturation front in the caprock during CO2 storage](https://discourse.opengeosys.org/t/negative-capillary-pressure-instability-on-the-saturation-front-in-the-caprock-during-co2-storage/1732)

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**Author:** [@tjlyh777](https://discourse.opengeosys.org/u/tjlyh777)\
**Replies:** 2\
**Last updated:** [November 14, 2025, 8:51am UTC](https://discourse.opengeosys.org/t/negative-capillary-pressure-instability-on-the-saturation-front-in-the-caprock-during-co2-storage/1732 "2025-11-14T08:51:08Z")

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Hi all, I have been simulating CO2 flow in a model with two layers, i.e., capock and aquifer, trying to model the CO2 invasion into the caprock. The size of the model is 50 x 7 m. The thickness of caprock is 1m and the t…

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## [Liquid Flow Neumann error](https://discourse.opengeosys.org/t/liquid-flow-neumann-error/1711)

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**Author:** [@Ronia\_a](https://discourse.opengeosys.org/u/Ronia_a)\
**Replies:** 2\
**Last updated:** [November 14, 2025, 8:38am UTC](https://discourse.opengeosys.org/t/liquid-flow-neumann-error/1711 "2025-11-14T08:38:16Z")

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Hi I am unable to do my liquid flow simualtion, I have 9 media and I have a salt material in the center which is impermeable. I have assigned BC to left boundary which is a flux\_in value as Neumann Initial conditions …

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## [Infinite Flow Plane](https://discourse.opengeosys.org/t/infinite-flow-plane/1733)

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**Author:** [@ShF](https://discourse.opengeosys.org/u/ShF)\
**Replies:** 1\
**Last updated:** [November 12, 2025, 10:25am UTC](https://discourse.opengeosys.org/t/infinite-flow-plane/1733 "2025-11-12T10:25:59Z")

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Hello, Is it possible to set outflow boundaries to no condition? I have a 2D fracture plane, modeling the flow diffusion from injecting flow rate. But, as far as I know OGS sets the no flow condition on the outer bounda…

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## [How to Get Started with Reactive Transport Modeling in OGS6](https://discourse.opengeosys.org/t/how-to-get-started-with-reactive-transport-modeling-in-ogs6/1729)

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**Author:** [@KFC\_forever](https://discourse.opengeosys.org/u/KFC_forever)\
**Replies:** 4\
**Last updated:** [November 12, 2025, 12:47am UTC](https://discourse.opengeosys.org/t/how-to-get-started-with-reactive-transport-modeling-in-ogs6/1729 "2025-11-12T00:47:53Z")

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Hello everyone, Recently, I have been learning the Reactive Transport in OGS6 and have encountered several difficulties in understanding and applying it. I am already familiar with the numerical framework and general wo…

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## [Help needed in 3D BHE CXA design](https://discourse.opengeosys.org/t/help-needed-in-3d-bhe-cxa-design/1713)

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**Author:** [@xenner](https://discourse.opengeosys.org/u/xenner)\
**Replies:** 7\
**Last updated:** [October 30, 2025, 12:26pm UTC](https://discourse.opengeosys.org/t/help-needed-in-3d-bhe-cxa-design/1713 "2025-10-30T12:26:48Z")

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Hello all, I am a drilling engineer and we are working on a technology to reach approximately 20km by rotary drilling. The objective with this technology is to create big bore coaxial enhanced closed loop geothermal wel…

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## [ImportError: DLL load failed while importing simulator](https://discourse.opengeosys.org/t/importerror-dll-load-failed-while-importing-simulator/1674)

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**Author:** [@Diogo\_Folador\_Rossi](https://discourse.opengeosys.org/u/Diogo_Folador_Rossi)\
**Replies:** 4\
**Last updated:** [October 27, 2025, 11:54am UTC](https://discourse.opengeosys.org/t/importerror-dll-load-failed-while-importing-simulator/1674 "2025-10-27T11:54:23Z")

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Hello, I’m a beginner user of OpenGeoSys, but I think there is a problem with the binaries distributed by PIP packages: Folowing the procedure in Your first OGS run in 5 minutes with “Option 1: Python”, I set everythin…

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## [Hydro-mechanical coupling](https://discourse.opengeosys.org/t/hydro-mechanical-coupling/1716)

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**Author:** [@stefanjon](https://discourse.opengeosys.org/u/stefanjon)\
**Replies:** 3\
**Last updated:** [October 23, 2025, 1:09pm UTC](https://discourse.opengeosys.org/t/hydro-mechanical-coupling/1716 "2025-10-23T13:09:03Z")

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Hi, I am new to OpenGeoSys and I have questions about coupling mechanical and porous flow processes. I want to know if OpenGeoSys support coupling of the PDE at the solver level. What I mean by that is that mechanical …

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## [Defining initial stress state for a multilayer model](https://discourse.opengeosys.org/t/defining-initial-stress-state-for-a-multilayer-model/1705)

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**Author:** [@2ophie](https://discourse.opengeosys.org/u/2ophie)\
**Replies:** 2\
**Last updated:** [October 15, 2025, 9:51am UTC](https://discourse.opengeosys.org/t/defining-initial-stress-state-for-a-multilayer-model/1705 "2025-10-15T09:51:39Z")

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Dear community, I am trying to define the initial stress state (including Sv, Shmin and SHmax) for a multilayer model. In my case, the overburden is not a problem because it is automatically calculated from gravity and …

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## [Ogs dataexplorer cannot load gmsh file](https://discourse.opengeosys.org/t/ogs-dataexplorer-cannot-load-gmsh-file/1701)

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**Author:** [@Prince](https://discourse.opengeosys.org/u/Prince)\
**Replies:** 16\
**Last updated:** [September 29, 2025, 9:51am UTC](https://discourse.opengeosys.org/t/ogs-dataexplorer-cannot-load-gmsh-file/1701 "2025-09-29T09:51:14Z")

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Hello everyone, I am a beginner of ogs. I have a problem importing gmsh file into data explorer to convert the file into readable format for ogs software. I am using ogs 6.5 with the latest version of data explorer. Is …

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## [PyVistaAttributeError when using MeshSeries.extract\_probe in “Reading OGS Output: Diffusion, Sorption, and Decay in a 1D Reactive Transport Model” tutorial](https://discourse.opengeosys.org/t/pyvistaattributeerror-when-using-meshseries-extract-probe-in-reading-ogs-output-diffusion-sorption-and-decay-in-a-1d-reactive-transport-model-tutorial/1700)

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**Author:** [@Ele](https://discourse.opengeosys.org/u/Ele)\
**Replies:** 2\
**Last updated:** [September 27, 2025, 2:14pm UTC](https://discourse.opengeosys.org/t/pyvistaattributeerror-when-using-meshseries-extract-probe-in-reading-ogs-output-diffusion-sorption-and-decay-in-a-1d-reactive-transport-model-tutorial/1700 "2025-09-27T14:14:35Z")

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Dear all, While following the official OGS tutorial “Reading OGS Output: Diffusion, Sorption, and Decay in a 1D Reactive Transport Model”, I encountered a PyVistaAttributeError when trying to extract time series data at…

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## [Grdecl format to vtu/vti](https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699)

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**Author:** [@Iman\_Oraki](https://discourse.opengeosys.org/u/Iman_Oraki)\
**Replies:** 1\
**Last updated:** [September 23, 2025, 11:15am UTC](https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699 "2025-09-23T11:15:08Z")

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Hello Everyone. There was a previous question in 2023 ( How to use grdecl or zmap grid / or how to convert them to msh or vtu - OpenGeoSys Community) but I was wondering if there is “any way, method or technique” to conv…

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## [Problems with HT process in 2D mesh (error in matrix)](https://discourse.opengeosys.org/t/problems-with-ht-process-in-2d-mesh-error-in-matrix/1692)

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**Author:** [@Ronia\_a](https://discourse.opengeosys.org/u/Ronia_a)\
**Replies:** 7\
**Last updated:** [September 16, 2025, 1:12pm UTC](https://discourse.opengeosys.org/t/problems-with-ht-process-in-2d-mesh-error-in-matrix/1692 "2025-09-16T13:12:22Z")

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The following is my HT prj for 2D mesh - \<?xml version='1.0' encoding='ISO-8859-1'?\> \<OpenGeoSysProject\> \<meshes\> \<mesh\>2Dmesh\_initialfields.vtu\</mesh\> \<mesh\>leftHT.vtu\</mesh\> \<mesh\>2Dboundar…

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## [Code of the THM model for a discrete fractured matrix](https://discourse.opengeosys.org/t/code-of-the-thm-model-for-a-discrete-fractured-matrix/1688)

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**Author:** [@Chengdong\_Den](https://discourse.opengeosys.org/u/Chengdong_Den)\
**Replies:** 4\
**Last updated:** [September 11, 2025, 2:24pm UTC](https://discourse.opengeosys.org/t/code-of-the-thm-model-for-a-discrete-fractured-matrix/1688 "2025-09-11T14:24:06Z")

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Hi, OGS developers, I found a text description of the THM model for a discrete fractured matrix under Benchmarks/Thermo-Hydro-Mechanics, but there is no corresponding code. May I learn about the code? Thanks in advance…

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## [Interface tespy/OGS](https://discourse.opengeosys.org/t/interface-tespy-ogs/1686)

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**Author:** [@einsor](https://discourse.opengeosys.org/u/einsor)\
**Replies:** 1\
**Last updated:** [September 10, 2025, 5:57am UTC](https://discourse.opengeosys.org/t/interface-tespy-ogs/1686 "2025-09-10T05:57:37Z")

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I am trying to make a simulation of a configuration of BHES that are connected, some in serial others in parallel. Thus I need to use tespy to compute the flows and connect the temperatures. The example on the OGS-site h…

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## [Pausing the simulation and change the project file while running](https://discourse.opengeosys.org/t/pausing-the-simulation-and-change-the-project-file-while-running/1683)

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**Author:** [@ShF](https://discourse.opengeosys.org/u/ShF)\
**Replies:** 1\
**Last updated:** [September 3, 2025, 3:40pm UTC](https://discourse.opengeosys.org/t/pausing-the-simulation-and-change-the-project-file-while-running/1683 "2025-09-03T15:40:11Z")

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Hello everyone, I would like to know if it is possible in OGS to edit the simulation while running it. Or in other words, is it possible to run a project file and model, initialized with the results of a previous run? …

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## [OGS\_6.5.5 + TH2M process + Output + sigma\_total](https://discourse.opengeosys.org/t/ogs-6-5-5-th2m-process-output-sigma-total/1681)

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**Author:** [@JP\_Kruse](https://discourse.opengeosys.org/u/JP_Kruse)\
**Replies:** 3\
**Last updated:** [September 2, 2025, 10:26am UTC](https://discourse.opengeosys.org/t/ogs-6-5-5-th2m-process-output-sigma-total/1681 "2025-09-02T10:26:47Z")

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Dear ogs-Team, I tried to add the total stress as output for models that use the TH2M process. When I try to add sigma\_total as secondary variable, ogs crashes with the following error message: critical: /\*\*\*/ogs-6.5.5…

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## [How to set property to change over time?](https://discourse.opengeosys.org/t/how-to-set-property-to-change-over-time/1677)

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**Author:** [@KFC\_forever](https://discourse.opengeosys.org/u/KFC_forever)\
**Replies:** 7\
**Last updated:** [September 2, 2025, 5:47am UTC](https://discourse.opengeosys.org/t/how-to-set-property-to-change-over-time/1677 "2025-09-02T05:47:55Z")

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Dear all, I want to set a property that varies over time (such as density) by Curve, but how should I set “curve\_name\_coords\</independent variable\>” (Independent variable needs to point to Time)? It seems that “curve\_n…

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## [Import ogs.callbacks gives "Import error"](https://discourse.opengeosys.org/t/import-ogs-callbacks-gives-import-error/1667)

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**Author:** [@einsor](https://discourse.opengeosys.org/u/einsor)\
**Replies:** 5\
**Last updated:** [August 26, 2025, 6:41am UTC](https://discourse.opengeosys.org/t/import-ogs-callbacks-gives-import-error/1667 "2025-08-26T06:41:01Z")

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I want to try to use the tespy package together with ogs, but doing so I have stumbled into a problem. Trying to run the 3D\_3BHEs\_array example I get an error at the “import ogs.callbacks” in the python files. Have used …

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## [Metis + integration points + petsc](https://discourse.opengeosys.org/t/metis-integration-points-petsc/1672)

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**Author:** [@carlos](https://discourse.opengeosys.org/u/carlos)\
**Replies:** 2\
**Last updated:** [August 22, 2025, 6:50am UTC](https://discourse.opengeosys.org/t/metis-integration-points-petsc/1672 "2025-08-22T06:50:03Z")

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Dear ogs-Team, we want to run a (restart) simulation using openmpi + petsc. The restart mesh contains integration points. We got the following warning: “warning: Could not open file ‘Mesh\_physical\_group\_Boundary\_Fron…

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## [Error in process assembly: MFront: integration failed with status -1](https://discourse.opengeosys.org/t/error-in-process-assembly-mfront-integration-failed-with-status-1/1668)

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**Author:** [@maripicod](https://discourse.opengeosys.org/u/maripicod)\
**Replies:** 4\
**Last updated:** [August 11, 2025, 7:36am UTC](https://discourse.opengeosys.org/t/error-in-process-assembly-mfront-integration-failed-with-status-1/1668 "2025-08-11T07:36:53Z")

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Dear all, I am currently using the TRM module to run a coupled thermo-hydro-mechanical simulation of a pile embedded in soil. The soil is modeled using a custom constitutive model implemented in MFront. In the simulati…

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## [Free Surface in seepage](https://discourse.opengeosys.org/t/free-surface-in-seepage/1670)

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**Author:** [@pinkfloyd-max](https://discourse.opengeosys.org/u/pinkfloyd-max)\
**Replies:** 0\
**Last updated:** [August 11, 2025, 2:30am UTC](https://discourse.opengeosys.org/t/free-surface-in-seepage/1670 "2025-08-11T02:30:38Z")

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How is the free surface calculated during seepage in OpenGeoSys? In which file can the relevant code be found?

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## [Parsing \*.prj with ogstools](https://discourse.opengeosys.org/t/parsing-prj-with-ogstools/1664)

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**Author:** [@carlos](https://discourse.opengeosys.org/u/carlos)\
**Replies:** 5\
**Last updated:** [July 17, 2025, 11:52am UTC](https://discourse.opengeosys.org/t/parsing-prj-with-ogstools/1664 "2025-07-17T11:52:44Z")

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Hi, is it possible to parse the \*.prj file using ogs tools? For example, using the TH2M process, get all parameters (i.e parameter values) for the given phases? Thanks in advance. Cheers, Carlos

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## [HTC and temperature-dependent viscosity](https://discourse.opengeosys.org/t/htc-and-temperature-dependent-viscosity/1657)

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**Author:** [@jtecklenburg](https://discourse.opengeosys.org/u/jtecklenburg)\
**Replies:** 3\
**Last updated:** [July 10, 2025, 10:24am UTC](https://discourse.opengeosys.org/t/htc-and-temperature-dependent-viscosity/1657 "2025-07-10T10:24:51Z")

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Dear OGS Community, I would like to build a model of a geothermal doublet. In doing so, I want to take into account temperature-dependent viscosity as well as changes in porosity and permeability due to chemical process…

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## [Liquid\_Flow: Storage, Specific Yield, and Unconfined/Confined Aquifers](https://discourse.opengeosys.org/t/liquid-flow-storage-specific-yield-and-unconfined-confined-aquifers/1654)

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**Author:** [@BaSLab](https://discourse.opengeosys.org/u/BaSLab)\
**Replies:** 1\
**Last updated:** [July 7, 2025, 5:13pm UTC](https://discourse.opengeosys.org/t/liquid-flow-storage-specific-yield-and-unconfined-confined-aquifers/1654 "2025-07-07T17:13:58Z")

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Hello, I’m learning how to use OGS6 and trying to create a simple Liquid\_Flow simulation. However, while reviewing the benchmarks, I’m having trouble understanding the Storage parameter. From what I understand, it’s di…

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## [Advice on a curved CXC BHE Model with different soil properties](https://discourse.opengeosys.org/t/advice-on-a-curved-cxc-bhe-model-with-different-soil-properties/1636)

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**Author:** [@Deylin\_Yiao](https://discourse.opengeosys.org/u/Deylin_Yiao)\
**Replies:** 3\
**Last updated:** [June 24, 2025, 12:59pm UTC](https://discourse.opengeosys.org/t/advice-on-a-curved-cxc-bhe-model-with-different-soil-properties/1636 "2025-06-24T12:59:52Z")

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Hello! I am trying to simulate a curved well co-axial centered BHE (i.e., the entirety of a horizontal well) using the tutorial provided. I’m more focused on looking at how it would affect the soil temperature over a per…

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## [Numerical Instability with Low Air-Entry Pressure pb in SaturationVanGenuchten Property](https://discourse.opengeosys.org/t/numerical-instability-with-low-air-entry-pressure-pb-in-saturationvangenuchten-property/1646)

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**Author:** [@HMarceloLab](https://discourse.opengeosys.org/u/HMarceloLab)\
**Replies:** 3\
**Last updated:** [June 24, 2025, 9:00am UTC](https://discourse.opengeosys.org/t/numerical-instability-with-low-air-entry-pressure-pb-in-saturationvangenuchten-property/1646 "2025-06-24T09:00:49Z")

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Dear OGS team and community, I’m currently implementing a two-phase CO₂ injection benchmark in OGS using the THERMAL\_TWOPHASE\_WITH\_PP process. My setup works well when I use high values of air-entry pressure p\_b , such …

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## [OGS6 compilation with Intel MKL and MFRONT](https://discourse.opengeosys.org/t/ogs6-compilation-with-intel-mkl-and-mfront/1644)

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**Author:** [@Miao](https://discourse.opengeosys.org/u/Miao)\
**Replies:** 2\
**Last updated:** [June 18, 2025, 9:55am UTC](https://discourse.opengeosys.org/t/ogs6-compilation-with-intel-mkl-and-mfront/1644 "2025-06-18T09:55:41Z")

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Hi all, I am trying to set up a slope model that considers the rainfall and water level fluctuation (Richards Mechanics). I would like to compile OGS6 enabling Intel MKL and MFront, such that PARDISO solver can be used.…

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