How is flow net constructed?
Mathematically, the process of constructing a flow net consists of contouring the two harmonic or analytic functions of potential and stream function. These functions both satisfy the Laplace equation and the contour lines represent lines of constant head (equipotentials) and lines tangent to flowpaths (streamlines).
What is flow net in soil mechanics?
Flow net represents the flow of water through a soil graphically. Applications include calculation of uplift pressure, exit gradient, heaving and pore water pressure.
What is flow net in civil engineering?
A Flow net is a graphical representation of flow of water through a soil mass. It is a curvilinear net formed by the combination of flow lines and equipotential lines.
What is the purpose of flow net?
THE FLOW-NET PROVIDES A MEANS OF ESTIMATING THE POSITION OF THE SATURATION LINE WITHIN EMBANKMENTS, AND THE DISTRIBUTION OF SEEPAGE FORCES AND UPLIFT PRESSURES THROUGHOUT.
Which is the most commonly used method of construction of flow net?
2. Flow Net Construction by Graphical Method. Among the various methods of flow net construction, the most convenient method is the Graphical method. The graphical method is the method in which the flow net is constructed by an intensive trial and error procedure.
What are the limitations of flow net?
The flow net analysis cannot be applied in the region closed to the boundary where the effects of viscosity are predominant. The flow net is not applied to sharply diverging flow , as the actual flow pattern is not represented by the flow net.
What type of boundary conditions are required for the flow net?
We can summarize the rules for graphical flow net construction in heterogeneous, isotropic systems as follows: (1) flowlines and equipotential lines must intersect at right angles throughout the system; (2) equipotential lines must meet impermeable boundaries at right angles; (3) equipotential lines must parallel …
What is NF and ND?
Nd = number of potential drops Nf = number of flow channels h = total head loss q = total quantity of unit flow.