2 edition of **Two-phase fluid break flow measurements and scaling in the advanced plant experiment (APEX)** found in the catalog.

Two-phase fluid break flow measurements and scaling in the advanced plant experiment (APEX)

David Alan Pimentel

- 374 Want to read
- 5 Currently reading

Published
**1996** .

Written in English

- Two-phase flow -- Mathematical models.,
- Pressurized water reactors -- Loss of coolant -- Mathematical models.

**Edition Notes**

Statement | by David Alan Pimentel. |

The Physical Object | |
---|---|

Pagination | 45 leaves, bound : |

Number of Pages | 45 |

ID Numbers | |

Open Library | OL15422702M |

such flow conditions means that one two-phase flow channel should be described with several multi-fluid models, where these models are based on the mass, fluid streams involved in the two-phase flow, as well as on the corresponding closure laws for the prediction . pressure drop under single and two-phase flow conditions. Experiments were carried out to measure the pressure drops across these components with single-phase (water) and two-phase (air-water). The data were analysed. A comparative study of the existing correlations was also done. Using Least-square. Experimental and numerical work on two-phase flow in fractured porous media has been initiated. An apparatus for monitoring this type of flow was designed and constructed. It consists of an artificially fractured core inside an epoxy core holder, detailed pressure and effluent monitoring, saturation measurements by means of a CT-scanner and a. The Reservoir (2P) block sets pressure and temperature boundary conditions in a two-phase fluid network. The reservoir is assumed infinite in size, causing its pressure and specific internal energy to remain constant. Port A represents the reservoir inlet. The flow resistance between port A and the reservoir interior is assumed negligible.

~ A Pressure Iteration Scheme for Two-Phase Flow Modeling W.H. LEE Energy Division Los Alamos Scientific Laboratory University of California Los Alamos, New Mexico , USA A stable semi-implicit numerical scheme is [email protected] for solving nonequilibrium, nonhomogeneous two Cited by:

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The need for two-phase flow measurement in the power generation industry has been significantly increased over the last few years. This is mainly because the reliable measurements of the two-phase Author: Volfango Bertola. Buy Fluid Mechanics and Measurements in Two-phase Flow Systems on FREE SHIPPING on qualified orders Fluid Mechanics and Measurements in Two-phase Flow Systems: : Books.

Single-phase Fluid Flow; Multi-phase Fluid Flow (or Two-phase Fluid Flow); This is a basic of the fluid flow equations (e.g. Bernoulli’s Equation) and relationships that were discussed in this section (Fluid Dynamics) were derived for the flow of a single phase of fluid whether liquid or vapor.

Solution of multi-phase fluid flow is very complex and difficult and therefore. Buy Fluid Mechanics and Measurements in Two-Phase Flow Systems on FREE SHIPPING on qualified orders.

Two-phase flow in fractured rocks occurs in recovery of petroleum or natural gas, recovery of coalbed methane, exploitation of geothermal energy, and isolation of radioactive waste.

Models to predict two-phase flow in fractures are therefore of practical interest, Cited by: 2. Derivative of mass quality of the two-phase fluid with respect to pressure (numerical derivatives may be convenient for this), [1/Pa] dP_dL: float.

Pressure drop per unit length of pipe, [Pa/m] dA_dL: float. Change in area of pipe per unit length of pipe, [m^2/m] Returns: dP_dz: float. Acceleration component of pressure drop for two-phase flow.

In fluid mechanics, two-phase flow is a flow of gas and liquid — a particular example of multiphase -phase flow can occur in various forms, such as flows transitioning from pure liquid to vapor as a result of external heating, separated flows, and dispersed two-phase flows where one phase is present in the form of particles, droplets, or bubbles in a continuous carrier phase (i.e.

Results of a laboratory experiment for determining the relative phase permeabilities at the flow of two immiscible fluids through sandstone with orthotropic flow characteristics are presented.

As in [1], the measurements were performed on four oriented cores three of which were cut out from a fullsize core along the principal directions of the permeability : M.

Dmitriev, N. Dmitriev, A. Kuzmichev, V. Maksimov. Two-Phase Flow: Theory and Applications - CRC Press Book This graduate text provides a unified treatment of the fundamental principles of two-phase flow and shows how to apply the principles to a variety of homogeneous mixture as well as separated liquid-liquid, gas-solid, liquid-solid, and gas-liquid flow problems, which may be steady or.

Two Phase Fluid Flow Review. In fluid mechanics, two-phase flow occurs in a system containing gas and liquid with a meniscus separating the two phases. Two-phase flow is a particular example of multiphase flow.

All of the fluid flow relationships discussed previously are for the flow of a single phase of fluid whether liquid or vapor. At certain important locations in fluid flow systems. An unsteady fluid force on structures in a turbulent flow can cause their vibration.

This phenomenon is the most important among various flow-induced vibrations (FIV) and, consequently it is an important subject in designing nuclear plant components, for example, heat-exchangers. The Most Comprehensive Two-Phase Thermohydraulic Analyzer Available CRTech's fluid modeling module was designed right from the start to handle the peculiarities of two-phase flows along with the complexities of transitioning between single-phase and two-phase.

In fact, its development was initiated specifically to avoid the shortcomings of single-phase analyzers that had been retrofitted to. Flow of helium II, or of electrons in a superconductor, thought of as consisting of two interpenetrating, noninteracting fluids, a superfluid component which exhibits no resistance to flow and is responsible for superconducting properties, and a normal component, which behaves as does an ordinary fluid or as conduction electrons in a nonsuperconducting metal.

How is Two Phase Flow Experiment abbreviated. TPFE stands for Two Phase Flow Experiment. TPFE is defined as Two Phase Flow Experiment rarely. A wide range of models have been developed for two-phase flow systems.

These include: Homogeneous the homogeneous model, the two phases are assumed to be travelling at the same velocity in the channel and the flow is treated as being analogous to a single phase flow (see article on Multiphase Flow).

Separated flowthe two fluids are considered to be travelling at. vigour of two-phase flow research work. The papers cover a broad spectrum from the experimental investigation of complex fundamental aspects of two-phase flow to the study of practical devices and applications, the modelling of two-phase flow phenomena, and the numerical analysis.

@article{osti_, title = {Flow through a small break at the bottom of a large pipe with stratified flow}, author = {Reimann, J and Khan, M}, abstractNote = {A small break in a horizontal coolant pipe is investigated. This flow geometry and accident scenario are of interest in nuclear reactor safety research.

For the calculation of break mass flow rate, appropriate experiments are needed. Thermo-fluid dynamics of two-phase flow is an important subject for various scientific and engineering fields.

It plays a particularly significant role in thermal-hydraulic analysis of nuclear. Comparing Equations for Two-Phase Fluid Flow in Porous Media various 2D two-phase flow formulations. Model definition The geometry used to solve the Buckley-Leverett equation is a 1D geometry, see figure 1 for geometry and initial and boundary by: 5.

Modelling of two-phase flow in porous media with volume-of-fluid method Bertrand Lagree To cite this version: Bertrand Lagree. Modelling of two-phase flow in porous media with volume-of-fluid method. Me-chanics [physics]. Université Pierre et Marie Curie - Paris VI, English.

NNT: PA. telCited by: 1. Particle-fluid two-phase flow: the energy-minimization multi-scale method. Jinghai Li. Metallurgical Industry Press, - Science - pages. 0 Reviews. From inside the book. What people are saying - Write a review.

We haven't found any reviews in the usual places. Contents. Advanced Energy Systems Division Snippet view - The classic theory of fluid flow suggests that there are three possible gas-liquid flow mechanisms: (1) two-phase Darcy flow in the original porosity of the fabric, commonly referred to as visco-capillary flow; (2) two-phase gas-liquid flow along macro fractures; (3) and gas movement by solution and /or diffusion within interstitial fluids along prevailing hydraulic gradients, governed by Cited by: 7.

TY - JOUR. T1 - Mixing of a two-phase fluid by cavity flow. AU - Chella, Ravi. AU - Viñals, Jorge. PY - /1/1.

Y1 - /1/1. N2 - Interface stretching during mixing of a two-phase fluid in shear flow is investigated numerically by introducing a mesoscopic description of the by: Applying the homogeneous model, the two-phase flow is treated as pseudo-fluid characterized by suitable averaged properties of the liquid and gas phases.

First approaches to determine the frictional pressure drops of two-phase flow were based on modifications of the friction factor for single-phase by: 1. Application Focus: Two-Phase Flow in Petrochemical Catalytic Reactor. Laboratory reactors in the petrochemical sector, such as in catalyst research often have mixed phase outflow.

In order to use a single phase back pressure regulator, it is necessary to install a liquid separator upstream of the back pressure regulator. CHARACTERISTICS OF TWO PHASE FLUID FLOW IN PIPE BENDS Slamet Wahyudi, Sudjito Soeparman, Rudy Soenoko and Arief Yunizar R Brawijaya University- Jl MT.

Haryono, Malang, Indonesia E-Mail: [email protected] ABSTRACT Fluid movement of liquid through a pipe arch supported by a drop in p ressure caused by the inertia of the fluid. Micro or mini heat spreaders are used in the interest of providing higher cooling capability for microtechnologies.

Heat spreaders using micro or mini channels are not yet well studied, for this the fundamentals of two-phase heat transfer in microchannels are being studied.

Here, a comprehensive experimental two-phase flow study has been carried out on two single round tubes (D = and 0 Cited by: Basic Parameters of Two‐phase Fluid Flow. In this section we will consider the simultaneous flow of gas (or vapor) and liquid water (as encountered in steam generators and condensers) in concurrent flow through a duct with cross-sectional area A.

The subscripts “v” and “ℓ” indicate the vapor and liquid phase, respectively. Fundamental parameters that characterize this flow are. Modeling of Two-Phase Slug Flow. Annual Review of Fluid Mechanics Vol.

(Volume publication date January ) A sandstone sample used in the multiphase LBM simulation (top left). Other panels display two-phase fluid flows through the sandstone at different times (Buckles et al ).

This scaling down involves flow and Cited by: MFEST is an orbital flight experiment, originally designed for the Space Shuttle Mid‐Deck to: 1) test the feasibility of a water purifier for use in zero‐gravity conditions, and 2) demonstrate sustained operation of a two‐phase flow system with a passive gas/liquid : Kathryn Miller Hurlbert, Ralph Marak, Richard Cable Kurwitz, Mike Ellis.

Pressure Recovery in Two-Phase Flow At low Much number when the two-phase flow mixture expands and decelerates through an abrupt flow area, a part of the dynamic pressure head is recovered and a rise in static pressure is observed. The other part is File Size: KB. study of the air-lift pump with the centrifugal pump when handling two phase mixtures is also discussed in the paper.

Keywords: two phase flow, air-lift pump, immersion ratio. 1 Introduction An Air-Lift Pump is a device for raising liquids or mixture of liquids (mostly water) and solids through a vertical pipe partially submerged in the liquid, by.

Heat transfer coefficients, flow boiling regimes, flow instabilities, pressure drops, and conditions like dry‐out are some of the key issues in every boiling flow study. It is observed that a limited experimental database is available for the 19 mm ID channel diameter, i.e.

a typical tube diameter of steam generator. test stand for incorporation of unique two-phase system components. This test stand will allow ground and KC-[35 testing of an integrated advanced thermal control system and will enable photography and measurement of two-phase flow regimes with their associated pressure drops.

The objective of the experiment is to confirm the operational. The understanding of turbulent two-phase bubbly ﬂows is important due to the widespread occurrence of this phenomenon in natural and engineering systems [1].

The flow patterns of gas-liquid two-phase flow could be bubble flow, slug flow, plug flow, stratified flow. Two-phase fluid flows arise in a wide variety of industrial and scientific applications.

Inherent feature of the two-phase flows is the topological evolution of the interface between the two fluids, which leads to the formation of various flow patterns or regimes that depend. Engineering Data Book III Two-Phase Flow and Flow Boiling in Microchannels unexplored, one can expect that a further nanoscale two-phase flow and heat transfer domain may emerge as well for even smaller sizes of channels where yet other two-phase mechanisms control the Size: 1MB.

Two Phase Flow. Abdul Basit Ahmad ME02 IIT Patna Two Phase Flow Special case of Multiphase flow A gas-liquid flow is called two phase flow Large scale power systems most commonly studied case Also in refrigeration, heat pumps and air conditioning5/5(1).

Two-Phase Flows. This article, written by Dr. John Weisend, was originally published in the Volume 32 Number 4 issue of Cold Facts as part of his series, Defining Cryogenics. Two-phase flows are those flows in which there is a mixture of two physical states (solid, liquid or vapor).

We simulate two-phase fluid flow using a stress–strain relation based on Biot’s theory of poroelasticity for partial saturation combined with the mass conservation equations.

To uncouple flow and elastic strain, we use a correction to the stiffness of the medium under conditions of uniaxial strain. The pressure and saturation differential equations are then solved with an explicit time Cited by: 1. Elements Two-phase fluid building blocks, such as chambers, reservoirs, local restrictions, energy converters; Sensors Two-phase fluid mass and volumetric flow rate, pressure, temperature sensor blocks; Sources Two-phase fluid mass flow rate, pressure, volumetric flow rate source blocks; Utilities Basic environment blocks that specify fluid properties.The discussions start with the background of the research, followed by a short general description of two-phase flow and heat transfer phenomena.

The impact of the gravity level will be assessed. The discussions focus on development supporting theoretical work (thermal/gravitational scaling of two-phase flow and heat transport in two-phase thermal.Abstract— Two-phase forced convective flow in microchannels is promising for the cooling of integrated circuits.

There has been limited research on boiling flow in channels with dimensions below m, in which bubble formation and flow regimes can differ from .