Question

1. Fresh orange juice is to be mixed with concentrated orange juice and water. The mixing is to be accomplished by running the pipelines together into a single pipeline. For best mixing, should the flow be laminar or turbulent in a single pipeline? What are the possible methods of developing the type of flow that is required?

Answer 1

For best mixing, the flow should be turbulent in a single pipeline. Layers flow without mixing when flow is laminar. When there is turbulence, the layers mix, and there are significant velocities in directions other than the overall direction of flow. Turbulent flow, or turbulence, is characterized by eddies and swirls that mix layers of fluid together.

Single-phase blending:

Since both liquids are water-based, they dissolve easily in one another. The momentum of the liquid being added is sometimes enough to cause enough turbulence to mix the two, since the viscosity of both liquids is relatively low.