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Posted Mon, 18 Feb 2008 11:46:21 GMT by Mac
The end of pathlines at multi level wells seems to depend on where the wells defined: Using 4 slices (homogeneus aqufer) and a well on the 2nd and 3rd all pathlines ends between these two slices. Transfering the wells on the 1st and the 2nd slice all pathlines are ending at the node on slice 1. With wells at the nodes of slice 3 and 4 all pathlines are ending at the node on slice 4. With wells at all slices, all pathlines are ending at different levels!

Is this a bug? I estimated the pathlines to end at different levels depending on the defined screen of the well.
Posted Mon, 18 Feb 2008 13:28:24 GMT by Boris Lyssenko
This is true, and it is not a bug. You can imagine the FEFLOW simulation as a well bore with a pump in a certain elevation. The real flow lines also will always end up at the pump, no matter where the water enters the bore.
Posted Mon, 18 Feb 2008 14:12:20 GMT by Mac
O.K., but why do all pathlines end in my example in one node even when the node above or below has the same pumping rate to simulate a multi level well? Are all well-nodes taking effect although all pathlines are ending in only one (the last part of the pathline seems to be nearly vertical)?
Thank You for an additional answer!
Posted Mon, 18 Feb 2008 15:22:52 GMT by Boris Lyssenko
Within the multi-layer well, there is a very high conductivity. Therefore the pathlines will probably end at the node with the lowest calculated hydrlaulic head - which is the one extraction node in case of only one well node and extraction values of 0 at the others, and which might be any of the nodes in the case with the same extraction on all nodes.
Posted Mon, 18 Feb 2008 19:36:44 GMT by Mac
O.K., now I can interprete all "strange" pathline-sections I observed in my model.

Thank You!

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