Whenever the Reynolds number is less than about 2,000, flow in a pipe is generally laminar, whereas, at values greater than 2,000, flow is usually turbulent.

The Reynolds number (Re) of a flowing fluid is calculated by multiplying the fluid velocity by the internal pipe diameter (to obtain the inertia force of the fluid) and then dividing the result by the kinematic viscosity (viscous force per unit length).

The velocity of tap water is about u = 1.7 m/s . In our Reynolds number calculator, you can choose (as a substance) water at 10 °C and you obtain Reynolds number Re = 32 483 . Hence, the water flow is turbulent.

Laminar flow is defined as the movement of liquids without turbulences. The fluid flows in parallel layers with no disruption between them.

There are Six different types of fluid flow:

• Steady and Unsteady.
• Uniform and Non-Uniform.
• Laminar and Turbulent.
• Compressible and In-compressible.
• Rotational and Ir-rotational and.
• One, Two, and Three -dimensional Fluid Flow.

Types of Fluid Flow Fluid flow is generally broken down into two different types of flows, laminar flow and turbulent flow. Laminar flow is fluid motion in which all the particles in the fluid are moving in a straight line.

The three types of movements or flows within the international economic exchange are trade flows, human capital flows and capital flows or investments.

turbulent flow can characterize how fluid is moving, with a laminar flow being a more smooth, orderly flow, and a turbulent flow being rough and chaotic. Laminar flow has a constant velocity at any point within the fluid, imagine similar to a constant flow of traffic.

Turbulence appears when the Reynolds number is about 2300. Reynolds number = (density * D * flow speed) / viscosity. Details of the calculation: Reynolds number = (1.25 kg/m3)*(0.1 m)*(35 m/s)/(1.83*10-5 N s/m2) = 2.39*105.

Turbulent flow creates more friction drag than laminar flow due to its greater interaction with the surface of the airplane. These increases result in more air molecules being affected by the movement of the aircraft and a corresponding increase in friction drag.