Denim Umeshkumar Anajwala

The built-in method (from FEFLOW 5.3 on) uses the following approach, which I would prefer:
- Create a circle with a radius so that the circle does not touch the elements neighboring the well
- Use the nodal velocity field for the fluid flux calculation
- Do the calculation for all layers
- Sum the fluxes - the result will probably to be exactly the same as the defined pumping rate
- Calculate the percentage of abstraction for each layer using the summed abstractions
- Multiply the percentage with the total defined abstraction for each layer

There can be more reasons than I could list here...

Values higher than 15 degrees indicate an instable model with oscillations. Please refer to the literature about oscillations in numerical models and how to deal with them. The most imporant is a relatively fine calculation mesh.

FEFLOW does not consider the actual projection. The basic requirements for the projection used are:
- Coordinate units have to be in meter.
- The system has to be rectangular (x/y)

Please find some basic information attached.

If the 3rd kind bc represents the heat transfer between underground and air, the boundary condition should be set all over the model in the first slice.

I fully agree with you that this is the best (and easiest) method. I'd try to use a not-to small circle, and I'd also try different diameters to make sure that the result does not depend too much on the circle radius.

Yes, this is possible both during the simulation by creating arbitrary 'Observation point groups', i.e., groups of nodes where the boundary flow is caculated, and in a postprocessing step using the 'Budget Analyzer'.

In the 'New Mesh Editor' you can also define points outside the view window. And you can also pan during the drawing process.

Since FEFLOW 5.3, the Fluid Flux Analyzer contains an option to estimate the layer-based inflow into multi-layered wells.