We were
discussing the basic concept of Types of fluid flow, Discharge or flow rate, Continuity equation in three dimensions, velocity potential function and stream function
and total acceleration, in the subject of fluid
mechanics, in our recent posts.

Now we will go ahead to understand the basic difference between streamline and equipotential line, in the field of fluid mechanics, with the help of this post. We will also see here the basic of flow net with the help of this post.

###
**
Equipotential
line**

Equipotential
line is basically defined as the line along which the velocity potential (ϕ) is
constant.

For
equipotential line, ϕ = Constant

###
**Streamline**

Streamline
is basically defined as the line along which the Streamline function (Ψ) is
constant.

For
streamline, Ψ = Constant

Let us
consider the equation of equipotential line and stream line. We will conclude
here that the product of slope of equipotential line and slope of stream line
at the point of interseaction will be equivalent to -1.

Therefore we can say that equipotential line and stream line will be perpendicular to each other at the point of intersection.

###
**Flow
net**

If we will
draw equipotential lines and stream lines for a fluid flow, we will see that
both lines will intersect each other at right angle or orthogonally and will
develop one grid or net and that grid will be termed as flow net.

Flow net
is a very important tool to analyse the two dimensional irrotational flow
problems.

We will
discuss another term in fluid mechanics in our next post.

Do you
have any suggestions? Please write in comment box.

###
**Reference:**

Fluid mechanics, By R. K. Bansal

Image Courtesy: Google