• Re: TetGen internal error or self-intersection

    I got the same errors when I try to import volumes (.OBJ, DXF, STL, STC) from diferentes softwares (Rhino, Leapfrog). Many times I had to repair this intersection using other softwares. using MESHLAB, or PLAXIS Designer.
  • Re: Multilayer wells in Unstructured Mesh

    I really appreciate your advice.
  • Multilayer wells in Unstructured Mesh

    Hello everyone!

    Recently I am modelling a tailing dam using FEFLOW 7.4 considering an unstructured mesh. After calibrating the numerical model it will be necessary to simulate vertical pumping wells around the dam (upstream). Is there any recommendation for preparing the mesh? Since the pumping wells (multilayers wells in FEFELOW) are positioned along the edges of the elements.


  • Re: Horizontal 3D Shapes

    I recently have created a well (3D), using a shape (circle form)
  • Simulation Time Control

    Hi FEFLOW people.

    can anybody explain what [b][b]Growth factor between subsequent time steps (>1)[/b][/b] means?
    I only found this explanation (http://www.feflow.info/html/help71/feflow/mainpage.htm#rhhlterm=frowth%20factor&rhsyns=%20&t=08_ProblemSettings%2Fsimulation_time_control.html).
    Unfortunately, I was not able to understand at all.

    Kind regards,

  • Re: Exporting hydraulic conductivity values


    Have you verified the number of elements that you have in your model? If the number of elements of your model is greater than the number of rows of the sheet file, you will obtain an error.
    Maybe, you can try to export a part of your model, then, you will know if the problem is due to sheet file.

    good luck.
  • Time-step size

    Good day everybody!!!!
    I look forward someone can help me.
    I developed a numerical model in FEFLOW (transient), which simulates the infiltration of rainfall in a natural slope, considering unsaturated soil (Van Genuchtem modified Model) and discrete features. It was monitored three points (see Fig.1). The convergence of the simulation was good (dt_max=1d), however, as the time-step size (max) was reduced to a smaller value (like 0.5, 0.1, 0.05 or 0.01), the pressure history curves showed more oscillations. The aim of simulating the model with a smaller time step size was for obtaining a smoother curve, in place of that, it was obtained a curve with more oscillations.
    I am attaching all results (pressure history for three points, which are indicated in the Fig.2,3 and 4)

    Kind Regards,

    Hugo Ninanya
  • Re: transient modelling with recharge monthly data

    Hi Emilia

    The .pow files are defined as two columns (time - recharge). I am attaching an example (be careful with the units).
    For 2D models, I usually define the recharge though Neumann BC's, and, for 3D models the recharge is only defined on the top layer through material properties (inflow/outflow).

    Hugo Ninanya

  • Re: Discrete Features

    Many thanks Bjorn!
    It was  very useful.
  • Discrete Features

    Hi everyone!

    I hope all is fine with you,

    I wanted someone to answer a doubt. Currently, I am using discrete features in order to represent fractures, which can be in saturated or unsaturated condition. So, I didn't find any explanation about how to use these options: FEFLOW Problem Settings->Problem Class->Other Settings-> Unsaturated Discrete Features (Non-conductive, Fully conductive and smooth conductivity transition). Please, refer me any bibliography or tell me in which cases each one of these options could be used.

    Many thanks.

    Kind Regards,