Carlos Andres Rivera Villarreyes Business Owner - FEFLOW

No, it is not possible. Hydrodynamics model for rivers cannot be solved with steady-state concept. If you prefer to work in steady, then you would need to operate only with FEFLOW, where the river heads are prescribed by the Fluid-Transfer BC. Best regards, Carlos

Hi Max, The problem is that SAMG did not converge properly. I see you are working with a RMS norm. This is practical for standard cases, but in situations, where you have specific "hot spots" (e.g. not convergence directly at the BHE locations), it will be much useful to work with a MAX norm. The Max norm will focus on the spots with maximum error, presumably the BHE locations. Alternatively, you can give a try with the direct solver PARDISO. Best regards Carlos Rivera

Hi Tomás, I recommend you to get in touch with MIKE support (mike.de@dhigroup.com). The question is very generic and the fact of increasing the number of layers does not clarify the changes of water balances. Indeed, the Multilayer Well is an imposed source/sink. You would need to see this in the Rate Budget panel.  Best regards Carlos

Hi Sebastian, interesting question. You can change the direction of the gravity vector, but not the magnitude. I am wondering whether you could do a math trick by upscaling/downscaling other parameters in order to achieve your purposes. Cheers Carlos

Hi Adam, Density-driven flow problems are hard to solve, but not impossible. Negative concentrations are due to the poor discretization level and dispersivity values assigned to the model. If I were you, I would do the model in steps. Does your model run with constant head values (not tidal effects)? If no, this should be fixed first. You can take a look on the self-paced course below. There is a section covering some information about numerical oscillations and their connections with the mesh size and dispersivity. https://www.theacademybydhi.com/course-sessions/feflow---getting-started-with-groundwater-quality-modelling-11600061-153 Best regards Carlos Rivera

Hi Abel, The method is called getHistoryValues and you can find the documentation below: https://dhi.github.io/ifm/api_doc.html?highlight=history#ifm.FeflowDoc.getHistoryValues Best regards Carlos Rivera

Why don't you use directly the Monte Carlo functionality within FePEST application? You can parallelize with a couple of clicks only.. Cheers Carlos

ASCII files can just simply be created in any text editor. I personally use NotePad++. Then you just need to save the file as *.dat.

Hi, With the piFreeze instalation, you get automatically the user manual. In the PDF, you will find the description of the settings required. The manual should be available in the FEFLOW installation, by default as follows: C:\Program Files\DHI\2024\FEFLOW 8.1\modules64 Best regards Carlos Rivera

Hola Daniel, The documentation of SMESH files is available in this link: https://wias-berlin.de/software/tetgen/fformats.smesh.html I have attached an example of a cube with top elevation (-5 km) and bottom elevation (-41km). The SMESH can be used to described a closed volume, but you can use also used to represent surfaces. In FEFLOW, if you have a 3D model (e.g. layer-based), you can store a Face Selection and then export the faces as SMESH (simply right-click on the selection name). This is quite practical to learn the file format behind SMESH, or even quickly build SMESH files using FEFLOW. Saludos Carlos