Chapter 20, Problem 17A

When the speed of a fluid flowing in a horizontal pipe increases, what happens to the internal pressure in the fluid?

To determine

To explain: The effect on the internal pressure of the fluid, when the speed of the fluid increases in a horizontal pipe.

Explanation of Solution

Introduction:

According to Bernoulli’s principle, as speed of the fluid increases static pressure decreases.

Consider an ideal situation when the fluid is flowing in a horizontal pipe. Fluid is flowing constantly in the pipe. Now consider the situation when speed of the fluid flow increased. Here in this case, Bernoulli’s principle can be applied. According to this principle, as speed of the fluid increases in the pipe, internal pressure decreases.

Conclusion:

Internal pressure of the fluid decreases as speed of the fluid increases