Rotary Entrainment in Two Phase Stratified Gas-Liquid Layers: An Experimental Study
A stratified flow is a flow where there are fluids with density variation in the vertical direction. For example we can consider a system of two superimposed fluids in a channel with lighter fluid on the top. Rotary entrainment is a phenomenon in which the interface of two immiscible fluids is subjected to external flux by means of rotation. The entrainment process can be related to several everyday experiences which is a very important but complex phenomenon. In this phenomenon deformation of fluid takes place across the interface when it is subjected to external force. In this work an experimental study on rotary motion of a horizontal cylinder between…show more content… In this phenomenon deformation of fluid takes place across the interface when it is subjected to external force. By providing external turbulent force intermixing takes place across the interface and as a result of this deformation there will be heat and mass transfer across the interface of the two immiscible fluid. Rotary entrainment is having plenty of applications in fields like oil and gas industries, pharmaceutical industry, chemical and petrochemical industry, gas-liquid chemical reactors, chemical reaction between immiscible fluids etc. this study deals with the entrainment behavior between two immiscible fluids using a horizontal rotating cylinder between their…show more content… When the rotor started rotating the shaft, a distinct entrainment phenomenon was observed between air and water. To determine the flow dynamics and trajectories of this entrainment phenomenon several techniques have been used.
Ink dispersion technique
Using a syringe ink was injected into the water surface in a very precise volume. The flow of ink has been observed and captured by the camera B.
Particle image velocimetry (PIV)
This method has been used to track the velocity vectors of particles inside the entrainment region. Here the fluid is seeded with tracer particles. The fluid with entrained particles was observed and the motion of the seeded particlesis used to calculate the velocity field of the flow under study. PIV is an Eulerian method approach.
Particle tracking velocimetry (PTV)
This method has been used to track individual particle. This technique measures the velocity of particles dropped inside the fluid. PTV follows Lagrangian approach. Golden coloured aluminum balls have been used as the seeding particles to track velocity field in the entrainment region.
1) Rotary entrainment
Formation of water chute and air chute
Water chute in air