What is flow net in soil mechanics?


What is flow net in soil mechanics?

A flow net is a graphical representation of two-dimensional steady-state groundwater flow through aquifers. Construction of a flow net is often used for solving groundwater flow problems where the geometry makes analytical solutions impractical.

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 is NF and ND?

Nd = number of potential drops Nf = number of flow channels h = total head loss q = total quantity of unit flow.

How do you use a flow net?

To determine the amount of seepage and upward lift pressure below hydraulic structure. Once the flow net is constructed, the same one applies to flows at different discharges. A flow net analysis assists in the design of an efficient boundary shapes.

Why flow net is important?

Flow nets provide a general knowledge of the regional groundwater flow patterns that the hydrologist can use to determine such information as areas of recharge and discharge. Freeze and Cherry (1979, pg. 168) have stated that flow nets are an important concept of hydrology.

What are the component of flow net?

A flow net consists of two sets of lines which must always be orthogonal (perpendicular to each other): flow lines, which show the direction of groundwater flow, and equipotentials (lines of constant head), which show the distribution of potential energy.

What are the components of flow net?

What are the various methods for obtaining flow nets?

Various methods of obtaining flow nets are:

  • Graphical method.
  • Electrical flow Analogy method.
  • Sand Model.
  • Capillary flow Model.
  • Solution of Laplace equation/Analytical method.

What is equipotential line in seepage?

The equipotential line in seepage through a soil mass is defined as the line connecting the points of an equal head of water.

What is equipotential line in soil mechanics?

Flow lines represent the path of flow along which the water will seep through the soil. Equipotential lines are formed by connecting the points of equal total head.