• Re: Making element groups

    Thank you Peter!

    Kind regards.
  • Making element groups

    Hi! :)

    I'm almost done with my thesis model (yay!) and I'm now addressing the water recharge issue.

    My idea is to make from element selections (shown in attached picture), element groups, so I can make a mathematical expression for recharge based on lithology. Is it possible? and how?

    I'd love to do something like Q=m*Z+n but with 'if' statements based on lithology. So in summary it'd be like:

    if group==rock1: Q=m1*Z+n1
    else group==rock2: Q=m2*Z+n2

    Is it possible to make it?

    Update: I know it is matter in this case to select and apply different equations, but I think this 'if' feature in FEFLOW has a lot of potential.

    Kind regards.
  • Is there a way to get values of nodes in FEFLOW?

    Hello again! :)

    I'm wondering if there's a way in FEFLOW to 'store' different values (head, pore-pressure, darcy vel, etc) in several nodes in order to plot them afterwards?

    My project is about assessing the water inflow into a tunnel and it'd be splendid to have 'monitoring nodes' to plot their values in function of distance of the tunnel.

    Kind regards  ;)
  • How to introduce fractures in already meshed domain

    Hello! :) I have a question:

    1) Is there a way to introduce fractures/joints in an already meshed FEFLOW model? (.fem file). If so, how would the procedure be?

    My project is fully unstructured tetra elements so I don't know how to do it. I tried to set fractures before meshing (supermesh elements) but I failed, the geometry couldn't be meshed.

    The geometrical model is particularly difficult since I have a tunnel inside the hydro-geological region and the fractures go through the tunnel as well, which has deactivated elements. Is there a  way to handle this situation?

    Thanks in advance, kind regards.
  • Re: How does FEFLOW handle Dirichlet BC with variable elevations?


    Once again, thanks so much!

    Kind regards :)
  • How does FEFLOW handle Dirichlet BC with variable elevations?


    I have 2 queries related to BCs, both more or less theoretical questions:

    1) How does FEFLOW handle the fact of variable elevation at the boundary of a model, when you set a fixed head boundary condition?

    It is important for me, because I want to model a big river with Dirichlet BC, but I want to maintain  a reasonable distance (let's say 1-2 [m]) from the elevation of the topography at the boundaries of the model. Is there a way to handle this? maybe by using the 'expression' mode, is there a way to set as a function of elevation?

    Something like Head=z(node)-1[m]. Where z(node) is the elevation of a node.

    2) In case of modeling this river with third BC (Cauchy), do I have to select two 'rows' of nodes, as shown in the attached picture?, and why the units of Cauchy's formula are given in [m]?

    Thanks in advance!
  • Re: Making 'stages' in FEFLOW

    Thank you Peter!

    Kind regards. ;)
  • Making 'stages' in FEFLOW


    Simple question here:

    I'm modeling the inflow into a tunnel construction. The model is simple, only water flow under saturated, steady-state conditions.

    Is there a way in FEFLOW to model 2 (two) cases, inside the same file?. The first case would be the region considered without tunnels and the second, with tunnels excavated (by de-activating elements of the tunnels and setting 'seepage-face' BC).

    Is is possible (how if so), or I'm forced to do two cases in separated files?

    Thanks so much in advance. :)
  • Re: .STL file supermesh and meshing

    Thanks Peter!

    Now I'm completely clear on this,

    Best regards and have a nice weekend!
  • Re: .STL file supermesh and meshing

    I've just tried by adding some points in the interface, and declare these points as 'Points-add-ins' and then grouping by name.

    This is quite cool solution, but I would have to import hundreds of points per interface, according chosen Super-mesh.

    Is there a different way, dear Peter?