What’s new
Current version: 2026.1
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Volsung
Volsung 2026.1
Volsung 2026.1.2 is now available. Customers using Volsung 2026.1 or 2026.1.1 are recommended to upgrade to 2026.1.2
Volsung 2026.1 adds support for modelling coaxial geothermal wells and updates how 3D visualisation controls are accessed and simulation outputs are configured. This release also includes a licensing change and requires Bentley account authentication.
Key highlights:
- Model coaxial geothermal wells, with thermal conductivity varying along the wellbore to support Advanced Geothermal System (AGS) approaches.
- Review results using the Viewer Settings panel including contours, thresholds, and vectors.
- Configure simulation outputs using the Output Controls dialog, providing centralised control over output settings.
- Use additional modelling and visualisation options, including a spider web grid and 3D water‑table display.
- Access Volsung with a Bentley account using Bentley Connection Client on Windows or browser-based sign-in on Linux, learn more.
View the full Volsung 2026.1 release notes.
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Getting started
Get setup with your Volsung or Gudrun license, download example projects and watch tutorials.
Research papers
Access research papers on geothermal modelling with Volsung.
System Requirements
Recommended hardware and software requirements for customers running Volsung.
Core system requirements
| Minimum | Recommended | |
|---|---|---|
| Operating system | Microsoft Windows (64-bit) 10/11, or Ubuntu 24.04 | Microsoft Windows (64-bit) 10/11, or Ubuntu 24.04 |
| System memory | RAM: 2 GB | RAM: 16 - 32 GB |
| Storage | Hard Disk (HDD) 50GB capacity | Solid-State (SSD) 500 GB - 1 TB or larger capacity |
Open source library
Some of the libraries which Volsung is built on require us to make their source code available to users, for example under an LGPL license. Most users will never require these files. Use the links below to download the source code of the libraries:
Please contact us if you wish to alter libraries according to their respective license conditions and we will support you in your efforts.
Linux
Linux (Ubuntu and its Derivative Distros)
Note: If you’re new to Linux and want to try out Volsung’s exceptional NVIDIA GPU acceleration we recommend you try out the Linux Mint distribution with the Cinnamon window manager. You can test run Linux by installing the system on a second hard drive using dual boot or you can even run it on a large USB flash drive. The license files which we distribute will work under both Windows and Linux.
SNAP Installation for Linux
For non-Ubuntu based Linux distributions you can install Volsung directly from the SNAP store. Please follow the instructions there.
One small drawback of using Volsung as a SNAP installation is that it does not fully integrate into your desktop environment; i.e. you need to manually set the file associations so that double-clicking a file will open the corresponding Volsung application. How you do this depends on the desktop environment you are using; if you are using open desktop you can use the following scripts:
- /snap/volsung/current/bin/install-icons
- /snap/volsung/current/bin/install-mime-types
Note SNAP installations are maintenance free and will upgrade automatically when a newer version of Volsung becomes available.
For the installation first ensure that your package repositories are up-to-date:
- sudo apt update
- sudo apt upgrade
- sudo apt install libxcb-xinerama0 dbus-x11
If you plan to use GPU accelerated computing please correctly install your NVIDIA GPU first and ensure that the correct NVIDIA driver is installed on your system. If you install a GPU later on you may need to reinstall Volsung.
Next run the downloaded installer binary from the command line:
- chmod +x ./volsung-online-installer
- sudo ./volsung-online-installer
Note: if you do not have all required system packages installed then a terminal will pop up to install these missing packages.
Volsung Supported Data Types & Formats
For Volsung version 2026.1
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Inputs
- Wells
- Meshes/surfaces
- Points
- Image sections
- Flow simulation grid
- Volsung flow model
- Geological model closed volumes
File Types (Import)
Well Data
- Leapfrog Energy directional well plan (.csv)
Meshes/Surfaces
- GOCAD Tsurf meshes
Points
- x,y,z value (.csv)
Image sections
- jpeg, png, geotiff, geojson
Flow simulation grid
- Mulgrid geometry file
- VTK unstructured grid (.vtu)
TOUGH flow model
- AUTOUGH2 .DAT with Mulgrid geometry file
- TOUGH2.DAT (varying compatibility depending on version and EOS)
Geological model closed volumes
- Leapfrog (LFM)
Outputs
- Wells
- Meshes/Surfaces
- Points
- Flow simulation outputs
- Reports
File Types (Exports)
Well Data
- Any table to csv file
Meshes/Surfaces
- VTK format
Points
- x,y,z value csv
Flow simulation outputs
- HDF5
Reports
- PDF reports