Gretings! I am looking for advice regarding the model I have built in FEFLOW- flow and mass transport in transient state, for an unsaturated model. The model...
Monica, Among other things, FEFLOW (like some other models) suffers from a large numerical dispersion. The simplest solution is to subdivide the domain into...
Shlomo Orr
shlomo@...
Nov 26, 2008 7:10 am
143
Monica, A too coarse discretization would typically lead to oscillations rather than high numerical dispersion. So please check whether your dispersivity...
I forgot something in my last post: For open-loop systems, you often would like to link the injection temperature to the abstraction temperature by applying a...
Peter, I am not sure about oscillation. However, coarse discretization, especially in the vertical, definitely causes numerical dispersion in FEFLOW - at...
Shlomo Orr
shlomo@...
Nov 27, 2008 3:29 am
163
It is surprising that some spam messages are being circulated in the group for past few days, though the group is moderated. I am trying to look into the...
yes - it is done the same you would do with head, but select pressure as the variable of choice. under the mesh inspector, set the light blue button to...
I tried that When I use options->pressure instead of head I cannot define any time-variant function. It seems that is not possible to assign a time variant...
Odd, but you are right. On my first attempt, it seemed to work, but when I looked at the node with the inspector, it indicated the boundary condition was a...
Pete, assigning a pressure condition or a head condition for feflow is exactly the same. Let assume (as in my case) I have to model a seepage, I would use h=z...
Hi Gio, I see your point. There's no way around it but you can create the node and power lists outside of feflow and edit them into an ascii fem. I've done a...
Thanks Pete, As workaround I manage to generate some input files: one for the "power functions" and one for the "time variant ID". For the generation of the...
Pete, I have a terrible doubt now. If I define a power function (for a head boundary condition for example) file like the following one ! ! t [d] fvalue...
Hi Gio, I searched my notes and manuals about this and came up with nothing. In all the examples I've seen, the first time is always zero, and I have been in...
Thanks Pete. You are right, I figured out that Feflow interpolates the values at t=0 and t=730. As you said the only way to switch off the 1st boundary ...
hi everybody i desperate need a tutorial or some applications or examples using feflow, please if some have a file in pdf or word about this please send it to...
In the program folder you can find examples and exercises: C:\Program Files\WASY\FEFLOW 5.3\demo while in the Installing dvd you can find all the manuals and...
Hi giovanni Thank you but i do not have de cd program, so if you are so afable and send me the exercise I will be very thankful with you Bye Malena Lucen ...
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Hi I am facing a problem in feflow. It is when i am running my problem, the graph of head values at various observation points is showing too many oscillations...
it is hard to understand if it is problem or not. Can you provide more details of your model? transient or steady? and in the first case are the BCs transient...
Hi Manish, Oscillations are common especially in complex models; whether they are important depends on the whether the oscillations decrease to values small...
Hi Mr. Giovanni My model is saturated transient flow and contaminant transport with one river with transfer boundary conditions. Others boundary conditions are...
