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Flow Net
(Analisys of filtration by finite element method) |
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Filtration is a physical phenomenon which assumes great relevance in civil
engineering issues, and in particular in geotechnical engineering issues. The
phenomenon of filtration consists of the motion of a fluid mass inside a solid
mass (characterized by a given permeability) with specific energy characteristics.
The problem of filtration is very important when you want to deal with issues
connected with siphoning or also when – due to the high speeds of filtration
(i.e. with high permeability and problems in the presence of high hydraulic
head gradients) – a careful evaluation of the distribution of neutral pressures
and filtration forces is required.
Consider, an instance,
where the distribution of neutral pressures on the back
of a wall provided with drains differs from the triangular one, which has always
been accepted as a calculation distribution.
The Flow Net software allows the
analysis of filtration problems on domains of any shape, under fixed boundary
conditions and with materials provided with different permeability features. In
particular, it allows the determining the hydraulic head and
determining, along a
previously fixed straight line, the distribution of the previously listed
quantities.
For example, by fixing the interface line between the foundations and the
ground, it is possible to obtain the distribution of the neutral pressures ,
speeds or hydraulic head along said straight line. |
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