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  • direct solvers: exact solution??

    Hi,
    the HELP with FEFLOW says:

    [i]The Direct solution strategy provides the advantage of an exact solution of the equation system without any residual error due to a solver iteration. This might come at the expense of longer runtimes and higher memory demand, depending on problem setup and available hardware.[/i]

    But when I choose direct solvers, I got the following info:

                      No convergence in iteration loop at time: 1.000000e-03 with remaining error: 2.990310e+06 greater than  1.000000e-03

    it is contradictory. Any comments and help are appreciated.

    Quinn
  • measure: error message

    Hi,

    When I used "Measure" to measure the distance between two points, very often an error message appeared:

            Math: Argument domain error in function sqrt!

    Any comments?

    Thanks,

    Quinn
  • Re: cannot delete seepage face-FEFLOW 6.2

    Hi Carlos,

    When do you think the revised/upgraded version 6.2 could be issued?

    Thanks,

    Quinn
  • cannot delete seepage face-FEFLOW 6.2

    Hi,

    I am creating a 2D vertical planar steady state flow model.

    Problem 1:
    I tried to assign seepage face to a boundary. I double clicked on "hydraulic head-BC", selected several nodes by double clicking "seepage face_upper" under Node Selection, chose "seepage face", and clicked on the check mark.

    An window popped up, saying:

    [b]Max. flow-rate constrained cannot be displayed for Domain/seepage face_upper/Node Slice Intersection. Please select at least one compatible spatial unit before adding a data or map source to a view.[/b]

    But the view window still shows the seepage face. I checked the seepage face using Inspector, and things seems fine. 

    But when I selected the same node manually (not by double clicking "seepage face_upper" under Node Selection), everything worked fine.

    Problem 2:
    Another problem then came. When I chose the same nodes, and clicked on the cross mark, I cannot deleted these seepage face BC (when Seepage Face shown in the Editor tool bar); An error window popped up, saying "[b]invalid pointer[/b]"! Why?

    I never had this problem with FEFLOW 6.1.

    Thanks for help.

    Quinn 
  • Re: FePest not licensed?

    Hi Carlos,

    I just downloaded FePEST from online, which is version 6.2.2.987. In terms of license, I can use FEFLOW, and I think I should be able to use FePEST, right?

    Thanks,

    Quinn
  • FePest not licensed?

    Hi,

    I launched Parameter Estimation, clicked on "New", and selected a .fem file from the tutorial folder, and tried to open it. And then a popup window said "not licensed". Do I need a separate license for FePest?

    Thanks,

    Quinn
  • where to find the executables for Parameter estimation?

    Hi,

    For the first time I run parameter estimation, I was asked to give the directories to all the executables under tools>options. I just found fePEST.exe. where can I find the rest?

    Thanks,

    Quinn
  • FEFLOW 6.2 background map comes to front

    Hi,

    When I opened a model developed in FEFLOW 6.1, the base map I used in FEFLOW 6.1 (which appeared in the back in FEFLOW 6.1) comes to the front. It is totally opacity, and I cannot see the mesh. I tried to adjust the transparency, and it does not work. How to put the base map in the back so that I can see the mesh? Any help is appreciated.

    Quinn
  • symmetric vs nonsymmetric system

    Hi,

    FEFLOW includes solver for symmetric and nonsymmetric system. But how do you know if your system is symmetric or nonsymmetric?

    Thanks,

    Quinn
  • Is it possible to create a .fem file from a .dac file?

    I used seepage face to simulate dewatering wells in a 3D model with 9 layers. I re-run this .fem file recently, but cannot get the same .dac file as I got before (very strange!!!). The pumping rate from the seepage face were reasonable from my previous .dac file. But the .dac file I got this time shows a unreasonably large value and variation in pumping rate. I am thinking to re-create the .fem file from the previous .dac file. But is it possible?

    Thanks for help.

    Quinn