Annular heat pipes are most often used as Isothermal Furnace Liners. … Bridge wicks connect the inner and outer cylinders of the heat pipe to allow the fluid to return from the inner to the outer cylinder. Figure 2. Annular heat pipes are most commonly used as Isothermal Furnace Liners.
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 annular in drilling?
1. n. [Drilling] The space between two concentric objects, such as between the wellbore and casing or between casing and tubing, where fluid can flow. Pipe may consist of drill collars, drillpipe, casing, or tubing.
What is annular space for a well?
Annular space. means an open space between a casing or well screen and the side of a well, and includes space between overlapping casings within the well.
What does annulus mean in English?
ring 1 : ring. 2 : a part, structure, or marking resembling a ring: such as. a : a line of cells around a fern sporangium that ruptures the sporangium by contracting.
What is annular space in heat exchanger?
Annular Space – HRS AS Series The HRS AS Series is a fully stainless steel heat exchanger consisting of three or four concentric tubes. The product flows through the annular space and the service fluid flows through the inner and outer tubes to ensure even heating and cooling.
What is annulus in fluid mechanics?
Annular flow is a flow regime of two-phase gas-liquid flow (see gas-liquid flow). It is characterized by the presence of a liquid film flowing on the channel wall (in a round channel this film is annulus-shaped which gives the name to this type of flow) and with the gas flowing in the gas core.
What is slug flow in piping?
A multiphase-flow regime in pipes in which most of the lighter fluid is contained in large bubbles dispersed within, and pushing along, the heavier fluid. The word slug normally refers to the heavier, slower moving fluid, but sometimes to the bubbles of lighter fluid.
What is bubble flow?
A multiphase flow regime in pipes in which one fluid moves as small dispersed bubbles through a continuous fluid. … Bubble flow normally occurs at low flow rate and low holdup of the bubbly fluid. As the velocity of the continuous fluid increases, the bubbles are dispersed into smaller, more widely separated bubbles.
What is the function of annular?
Structure and Function The annular ligament stabilizes the radial head within the radial notch of the ulna as it rotates during supination and pronation of the forearm.
How does annular work?
The annular blowout preventer is responsible for sealing the space around the drill pipe (annular space). It achieves that by regulating the airflow to prevent mud, ensuring that the system operates efficiently. The annular BOP is usually placed on top of the BOP stack for efficient airflow control in the system.
What is the function of annulus?
The annulus is consists of cells that have very thick cell walls and it occurs as a band of cells. The function of the annulus is to throw the spores out of the sporangium and into the air. Note that the spores have very thick cell walls. Each spore is a 1N cell.
What is annular gas?
Annular gas flow can be defined as the formation gas flow in the concentric space between a casing and a wellbore wall, which is also known as annulus. The formation gas flows through the annulus during the phase when there is inadequate hydrostatic pressure.
How do you find the annular space?
Annulus Formulas in terms of radius r and π
- Outer circumference of an annulus: C1 = 2πr1
- Inner circumference of an annulus: C2 = 2πr2
- Surface area of the space enclosed by the outer circle. A1 = πr1 2
- Surface area of the space enclosed by the inner circle. A2 = πr2 2
- Surface area of the annulus (the gray shaded area)
Which piece of well equipment is used for annulus isolation?
The packer (more accurately described as the ‘upper completion production packer’) is a key piece of downhole equipment in many completions – a sealing device that isolates and contains produced fluids and pressures within the tubing string; it is a well barrier element, usually part of the well’s primary well barrier, …
What does annulus mean in biology?
In zoology, an annulus is an external circular ring. Annuli are commonly found in segmented animals such as earthworms and leeches. … In bivalve mollusks, annuli are concentric growth rings in their shells.
What is math annulus?
In mathematics, an annulus (plural annuli or annuluses) is the region between two concentric circles. Informally, it is shaped like a ring or a hardware washer. The word annulus is borrowed from the Latin word anulus or annulus meaning ‘little ring’. The adjectival form is annular (as in annular eclipse).
What does annulus mean in Latin?
Annulus: A ringlike structure, or any body part that is shaped like a ring. … Annulus is a misspelling of the Latin anulus (a little ring), the diminutive of the Latin anus (a ring of more substantial size).
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.
Is laminar a flow?
Laminar flow or streamline flow in pipes (or tubes) occurs when a fluid flows in parallel layers, with no disruption between the layers. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another like playing cards.
What is a flow regime?
A flow regime (or flow pattern) is essentially a description of the flow structure, or distribution of one fluid phase relative to the other.
How do you stop slugs from flowing in pipes?
Slug flow can be avoided in process piping by [56]: Using a low point effluent drain or bypass. Reducing line sizes to the minimum permitted by available pressure drops. Arranging the pipe configuration to protect against slug flow.
What is Slug water?
A slug discharge is any discharge including an accidental spill which has the potential to cause interference or pass through of a POTW.
What is slug effect?
As the velocity of the gas phase increases, the pressure decreases which generates a suction forces in the interface of liquid phase. These forces overcome the surface tension and gravity effect resulting in generating new waves that grow and develop to form liquid slugs.
What is dispersed bubble flow?
A two-phase flow regime in pipes in which dispersed gas bubbles move through a continuous fluid. … While the bubble flow usually is observed at low flow rate, the bubbles are dispersed into smaller and more widely separated bubbles as the continuous fluid flow rate increases.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.