What is the best description of the difference between compressible flow and incompressible flow?Group of answer choicesIn compressible flow, the flow is always turbulent, while in incompressible flow, the flow is always laminarIn compressible flow, for a straight pipe the rate of pressure drop is a function of the pipe position, whereas it decreases continuously for incompressible flowCompressible flow deals with fluids that have variable temperature, while incompressible flow deals with fluids that have constant temperatureIt is never appropriate to use the incompressible flow assumption for gases for any gas flow system

The main difference between compressible flow and incompressible flow lies in the density of the fluid. In compressible flow, the density of the fluid can change significantly, while in incompressible flow, the density of the fluid is assumed to remain constant.

Step 1: Understand the terms Compressible flow refers to the flow of fluids that are susceptible to changes in pressure or temperature, which can result in a significant change in the fluid's density. This is typically applicable to gases, as their density can change considerably with pressure and temperature changes.

Incompressible flow, on the other hand, refers to the flow of fluids that are not significantly affected by changes in pressure or temperature, meaning their density remains relatively constant. This is typically applicable to liquids, as their density does not change significantly with pressure or temperature changes.

Step 2: Compare the two In compressible flow, the changes in fluid density can affect the flow characteristics, such as velocity, pressure, and temperature. This means that the equations governing compressible flow need to account for these changes.

In incompressible flow, since the density is assumed to be constant, the flow characteristics are not affected by changes in density. This simplifies the equations governing incompressible flow.

Step 3: Conclusion In summary, the main difference between compressible and incompressible flow is whether the fluid's density can change significantly (compressible) or remains constant (incompressible). This difference affects the flow characteristics and the complexity of the equations used to describe the flow.