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## Error

• ### Re: elevation assignment: repair direction (Top/Down; Bottom/Up)

I think it would be useful if there were also the options:
"Top/Up" and "Bottom/Down".

Supposing we have that Slice 6 crosses Slice 5 in certain nodes. Instead of moving these nodes of slice 6 down and keeping constant slice 5 (as it would be with Top/Down), with the option Top/Up Slice 6 would keep the elevation assigned while slice 5 (and eventually all the layers above slice 5) will move Up in the nodes where the conflict occurs.

The other way around would be for the option "Bottom/Down".
• ### Re: Mesh Refinement

The generator-inbuild refinement works on the specified (selected) lines/polygon edges only. At the current development state, the tools for selecting these lines are not very advanced, so you need to manually select the lines where you wish to apply refinement. A selection based on maps for generator-refinement is not available in FEFLOW 6.0.

Alternatively you can do a manual refinement later (after the mesh has been generated), here you can use the nodal/elemental selection tools of the selection toolbar, including selection by maps.

Concerning the error: Are there extreme contrasts of size (very small supermesh features in a very large supermesh)?
[/quote]

Alex,
Yes there are some extreme contrasts of size.
By the way now I have got another problem while using triangle algorithm.

I try to run the algorithm around a map of contour lines but I got the error message:

Error: Segmentation fault during TRIANGLE mesh generation!

What does that mean?
• ### Re: increasing the layer elevation of 1 meter

I think I have figured out the first question, how to set up the initial 3D geometry.

But I am still struggling with the second question.

Which is the best way to create a layer with a costant slope?
• ### Re: increasing the layer elevation of 1 meter

1) Supposing my model has 7 layers and their elevation ranges from +65 to -30 metres.
How do I set the initial 3D layer configuration?
I set all the elevation as no fixed. But I always got an error of conflict when I assign the elevation of one layer, which is then corrected and costrained within a small range, that is not the one I assigned.

2) I would like to create a layer with a costant slope of 1 degree eastward starting from a certain elevation. How would you do that?

I'd very much appreciate if you can help me on that.
Thanks.
• ### Re: Problem setting up the Fluid-transfer BC

Thanks Peter.

Is it possible to overcome the problem by using another interpolation method?
• ### Problem setting up the Fluid-transfer BC

Hi everybody,
I am setting up the Fluid-transfer BC along rivers..
My supermesh has been refined over a shapefile representing my rivers.
Then I imported an ASCII file with some points close to the rivers.
I linked the head reference from the ASCII file to the Fluid-transfer BC. Then I chose as Data Regionalization Method, 1D linear interpolation along lines and as Selection Map the shapefile with the rivers. I left everything else as default.
I selected all the points along the rivers shapefiles and I applied the parameter association.

But in some parts I got too many lines connecting different nodes.
You can see in the picture below where in yellow are the selected points along the river shapefiles where I applied the boundary conditions.
In red the points from the ASCII file I used for linking the parameters. Close to the intersections of two rivers I got a net of green lines.
I guess this is physically not correct. How can I work around this problem?

[url=http://imageshack.us/f/577/feflowsnapshot.png/]http://imageshack.us/f/577/feflowsnapshot.png/[/url]

Thank you very much.
• ### increasing the layer elevation of 1 meter

Hi everyone, I´ve got a simple question.

Supposing that I have a 3D model with 4 layers.
I have set up the elevation of the 4th layer and I want the 3rd layer to have the same elevation as the 4th but increased by 1 meter.
How can I do that?

Thanks.
• ### Mesh Refinement

Hi all,
I am trying to refine my supermesh over supermesh lines. I am using the triangle method.
The problem is that in my "workspace" I have different maps so when I click the bottom for refining the mesh and I try to select all my lines, it considers also the lines of the other existing maps. I would like to refine just the lines belonging to a specific map. Can anyone help me on that?
I have alredy tried to select my map in the drop-down menu but it still selects all the supermesh lines available in my "workspace".

Moreover when I tried to run the supermesh generator after selecting different lines with the supermesh tool I got this error message:
Error: Ran out of precision at (....).
I attempted to split a segment to a smaller size than can be accomodated by the finite precision of floating point arithmetic.
Try incrreasing the area criterion and/or reducing the minimum allowable angle so that tiny triangles are not created.

I reduced the angle but still I got that message.

Thank you
• ### Re: elevation from contour lines

Thanks a lot Peter, but which software would you suggest to me for undertaking the interpolation?
I have a really complex contour shape. Please see the attachment.
I tried to use Surfer (with all its interpolation methods) but although I add points or other lines I always got artifacts. This I think because the contours are really close each others and have irregular shapes.

Anyway, you think that in order to implement the information on FEFLOW I should create a shape file (with point feature in this case) and then linking the parameters of that file to the supermesh by using the parameter association tool?
• ### Re: elevation from contour lines

I tried that but again the output is characterized by many artifacts! Thanks anyway.
Actually I came up with a method.
I convert my dxf file with the contour lines into a shape file with polygon features. Then in ArcGis I attribute to each polygon (representing an area between two lines) an elevation.

Then I go to FEFLOW and use the parameter association tool for associating that elevation to the supermesh.

It seems an elegant way to work around the problem but still I don't know whether there are better and faster methods. I hope so because converting the contour lines into a polygon feature could be quite tricky.