Denim Umeshkumar Anajwala

Hi, let me quote from the FEFLOW help below.

Best regards,
Peter

Density Ratio

Unit: [1]
Default value: 0

The density ratio ? describes the ratio between maximum and minimum density in a density-dependent transport model. It is defined as the density difference in the model divided by the density at reference concentration/temperature.

? = (?max-?0)/?0

It relates concentrations in the model to density differences. By default, FEFLOW assumes ?max to be the density at maximum concentration in initial or boundary conditions and ?0 as the density at a concentration of 0 mg/l.

By default, FEFLOW uses one single Density Ratio for the sum of all concentrations in multi-species simulations. By applying the corresponding setting in Transport Settings in the Problem Settings dialog the density ratio can be specified separately for each single species. In this case, the parameter shows up separately for each species.


Density ratio has to be 0 except for density-dependent models.

Please note that it is not possible to add a classic scale bar to a 3D view as due to projection the same real length will be longer in front and shorter in the back. Thus the size of the model can be displayed as Björn has described.

This topic has been moved to [url=http://forum.mikebydhi.com/index.php?board=3.0]FEFLOW[/url].

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There's currently no such plug-in I know of. It's a problem that, of course, can be solved by plug-in programming. Another solution - depending on the exact circumstances - could be to connect the seepage nodes by discrete features and then connect their lowest point to the infiltration point by an arbitrary discrete feature. This would only work, however, if infiltration is gravity-based.

found it:

tools --> units --> time [d] for x-axis
                    --> Concentration [mg/l] for y-axis

Hi there,
in mass transport, how can I change the unit of the axes in the "local concentration history"-chart? I want to have [mg/l] and [d] and don't find a option to change them.

Thx!

Hi there,

a simple question:
If I have a background concentration set to 5 mg/l in my model area, so also all b.c. got 5 mg/l,
how can I tell Feflow to give the rain (inflow on top) the same concentration? Or also inflow from bottom? Can I give both inflows (bottm and top) a different value, bottom for example 10 mg/l? Where do I set those in Feflow? Reference co?

Thanks!

Have you checked the setting for Minimal Slice Distance in the Editor Settings of the Problem Settings dialog? The distance defined there will determine when the verification dialog will appear. This is to make sure that the verification does not only check for intersection, but also for very small distances. If - for example - a distance of 0.01 m is set there, and you set a distance of 0.01 m, it may happen that the dialog comes up due to to internal rounding/variable conversion that makes 0.01 m into something that could be just a little bit larger than 0.01 m.

Version 6.0 of FEFLOW was somewhat 'in between' the Classic and the new Standard interfaces. This means that the new GUI did not contain the full functionality that was available in the classic interface. The observation point groups were added to the new GUI later on, and of course they are now available. If you have the means, I'd recommend updating at some time to be able to use all the improvements made since.

In Phreatic mode, FEFLOW (since version 4.x if I recall correctly) applies recharge to the top nodes (ground surface). So recharge has to pass the pseudo-unsat zone before reaching the water table. For details, you can also have a look at the corresponding explanation in the User Manual.