FEFLOW Newsletter / April 2016

It's been a while since we have informed you about FEFLOW news by email. This doesn't mean that the FEFLOW team has been sitting idle since - in fact it's rather the opposite. In the meanwhile FEFLOW 7.0 has been released, a quantum leap in terms of geometrical flexibility in groundwater modelling, and many of you have already started to apply the new options. Partially and fully unstructured meshing will also be the focus for this issue of the newsletter, with some useful tips and tricks, but also opportunities for advanced training.

In focus: Unstructured Meshing
Online Courses on Unstructured Mesh Modelling
A modular, hands-on, instructor led, online course has been designed and already very successfully run for the first time. With this course, as an experienced FEFLOW user you will obtain a clear understanding of FEFLOW's new capabilities concerning fully unstructured meshes.

The course has the duration of six hours divided in three modules. The course provides you with the skills you need for applying FEFLOW to complex geological settings and with complex geometrical designs as found, for example, in mine dewatering (open-cast geometry, inclined dewatering wells, inclined faults), or underground structures (pipes, tunnels, shafts, storage facilities).
The course includes relevant hands-on exercises combined with lectures on theory and relevant practical aspects. The basic principles outlined in the course can easily be related to your daily modelling tasks. You can find details about the courses on the course website.

- Course 1 (April 18th, 20th, 22nd), timed for the eastern hemisphere
- Course 2 (April 25th, 27th, 29th), timed for the western hemisphere
Groundwater Recharge
When releasing FEFLOW 7.0, it has not been possible to use the In-/outflow on top/bottom parameter in partially or fully unstructured models for representing groundwater recharge. Instead, a Fluid-flux boundary condition had to be applied.

This has been changed with update 7.03: Now In-/outflow on top/bottom can be used in all kinds of three-dimensional models. Boundary faces of the model that are (close to or perfectly) vertical are not considered for integration of In-/outflow on top/bottom, while the other faces of elements with non-zero recharge applied are assumed as top or bottom, and will get recharge.
Directional Wells and Borehole Heat Exchangers
Partially unstructured meshing can be used very well for representing non-vertical wells and borehole heat exchangers in an otherwise layered mesh. At the same time, this allows for a fine resolution along the well or BHE, while keeping the resolution in other parts of the model reasonably coarse.
In Short
FEFLOW 7.0 for Linux
FEFLOW 7.0 for Linux is now availabe for download on
The Linux version supports both graphical user interface and the command-line version and can therefore be used for the whole workflow of model setup, simulation, and postprocessing as well as for distributed parallel computing of many model runs, e.g., on Linux clusters. The latter is especially convenient in combination with FePEST.
Did you know that with one Corporate License for FEFLOW you can run as many simultaneous simulations of the same base model as you need, even on different computers?


DHI at InterPore 2016
Focusing on industrial porous media simulations, DHI will be an exhibitor at InterPore 2016 in May in Cincinnati/Ohio.

There are still a few seats available in our short course on FEFLOW! The hands-on course will encompass software handling, the simulation of unsaturated flow and FEFLOW's programming and scriping interfaces. With this special focus, it is perfectly suited as a basis for the simulation of flow and transport processes in industrial porous media, but also in more classic groundwater/vadose zone applications.


Update 7.03
FEFLOW 7.03 has been released recently, with a number of fixes, but also some new functionality, including the option to use the in-/outflow on top/bottom parameter in unstructured meshes, different default settings for unsaturated flow calculation, and a different handling of the building of the spatial tree that is internally used for addressing geometrical features.
Details are available in the release notes.

Update via the in-software update function or download the FEFLOW 7.03 installer.
New Module
FEFLOW piFreeze: Freezing and thawing in groundwater and the unsaturated zone
Phase changes from water to ice and vice versa occur in natural groundwater systems and due to human activity. Through latent heat, influencing the effective hydraulic conductivity and affecting the thermal properties they have a major influence on both fluid flow and the temperature regime. In many practical application cases it is thus not safe to ignore them.

FEFLOW piFREEZE, a plug-in to FEFLOW, supports the convenient extension of any two- or three-dimensional FEFLOW flow and transport models using Richards’ equation by phase changes between water and ice.

Typical applications include permafrost conditions, artificial ground freezing and freezing walls, borehole heat exchangers and earth collectors at sub-zero temperatures and thermal ice storages.
Read more
Learn with us
Through THE ACADEMY by DHI, we offer a wide variety of training courses. Check when courses are scheduled in your region and in your language – and mark your calendar now.


Numerical modelling for geothermal installations


FEFLOW - Introduction
to groundwater modelling


FEFLOW - Advanced groundwater modelling


Groundwater modelling
at mine sites
30 May
- 3 Jun


FEFLOW - Introduction
and advanced topics
30 May
- 1 Jun


Groundwater resources management
Find more training courses in our online calendar
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About DHI
DHI are the first people you should call when you have a tough challenge to solve in a water environment - be it a river, a reservoir, an ocean, a coastline, within a city or a factory.
Our knowledge of water environments is second-to-none. It represents 50 years of dedicated research and real-life experience from more than 140 countries. We strive to make this knowledge globally accessible to clients and partners by channelling it through our local teams and unique software.
Our world is water. So whether you need to save water, share it fairly, improve its quality, quantify its impact or manage its flow, we can help. Our knowledge, combined with our team's expertise and the power of our technology, holds the key to unlocking the right solution.
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