What is two-phase model?
Two-phase models are used for investigations of geotechnical problems in which the mechanical behaviour of soil is affected significantly by pore fluid. The field of application of the two-phase model is very versatile.
What is two-phase flow pattern?
Two-phase flow is a flow in which two different aggregate states of a substance or of two different substances are simultaneously present. The possible combinations include gaseous/liquid (see Gas content of fluid handled), gaseous/solid and liquid/solid (see Solids transport).
What are the different variations of two-phase flow are?
Two-phase flow, which involves fluid flow of a mixture of two phases, can be (1) liquid-vapor flow, (2) liquid-liquid, (3) liquid-solid particles, and (4) gas-solid particles.
What does the term 2 Phase flow mean?
multiphase flow
In fluid mechanics, two-phase flow is a flow of gas and liquid — a particular example of multiphase flow.
What is a 2 phase mixture?
A two phase mixture is a mixture of two different substances. An example of a two phase mixture would be a soft drink. It is a liquid and a gas. To separate these two substances you could heat the liquid and then capture the carbon dioxide.
Which of the following is two phase system?
Agar-starch was noted as a two-phase system for the first time by Beijerinck in 1896. Sodium carbonate- polyethylene glycol is another such system used during downstream processing mainly in biotechnological and chemical industries. Aqueous-two phase systems are of considerable value to biotechnology.
What causes slug flow?
Slug Flow is a typical two-phase flow where a wave is picked up periodically by the rapidly moving gas to form a frothy slug, which passes along the pipe at a greater velocity than the average liquid velocity.
What is annular flow?
1. n. [Production Logging] A multiphase flow regime in which the lighter fluid flows in the center of the pipe, and the heavier fluid is contained in a thin film on the pipe wall. The lighter fluid may be a mist or an emulsion.
What is 3phase flow?
Three-phase flows of gas and two liquid phases ( ) often occur during production of oil. A typical oil and gas reservoir contains gas, oil and water. As oil is extracted from the reservoir, the formation water beneath may flow into the well, due to its easier motion through the rock pores.
Is 240V single-phase or 2 phase?
240VAC Split Phase is produced off a single phase input transformer with center tapped secondary, producing for output, a single phase across the 240V outer terminals and two 120V legs with phases 180 degrees apart.
What is difference between 3 phase and 2 phase?
Three-phase electric power requires less conductor mass for the same voltage and overall power, compared with a two-phase four-wire circuit of the same carrying capacity. Two-phase circuits typically use two separate pairs of current-carrying conductors.
What is slug or plug flow?
Slug Flow – Vertical Tubes Increasing void fraction in bubbly flow causes agglomeration of bubbles into larger plugs and slugs. These slugs are similar in dimension to the tube diameter. These slugs travel at a speed that is a substantial fraction of the gas velocity and occur intermittently.
What is the flow quality of two phase flow?
The flow quality in a two-phase fluid flow is defined as: In two-phase fluid flow in is convenient to use the mixture density. The mixture density of the two-phase flow which is used to calculate pressure drop. The mixture density in a two-phase fluid flow is defined as: In two-phase fluid flow it is convenient to use the slip ratio.
Is the slip ratio unity in a two phase flow?
In the homogeneous equilibrium model (HEM) of two-phase flow, the slip ratio is by definition assumed to be unity (there is no slip). However, most industrial two-phase flows have different velocity of the gas and liquid phases, these can differ significantly.
What is the importance of two phase pressure drop?
Two-phase Pressure Drop In the practical analysis of piping systems the quantity of most importance is the pressure loss due to viscous effects along the length of the system, as well as additional pressure losses arising from other technological equipments like, valves, elbows, piping entrances, fittings and tees.
How are the two phases of fluid flow different?
In horizontal tubes, there can also be stratified flow (especially at low flow rates), at which the two phases separate under the effect of gravity. For a constant liquid flow rate, the vapor/gas phase tends to be distributed as small bubbles at low vapor flow rates.