A Simple Model for Estimating Two-Phase Momentum Flux

Morris, S.D.

doi:10.1016/b978-0-85295-175-0.50012-6

Cited by 8 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is a direct result of the momentum model used. The slip ratio correlation of Premoli et al [4] moves towards the maximum slip value at low mass¯ux, while the entrained liquid fraction of Morris [6] moves towards unity as the slip ratio moves towards that maximum value. This is not realistic.…”

Section: Incompressible Flow In Orifice Platesmentioning

confidence: 93%

“…In the upstream supply pipe, the mass ux, pressure, quality and gas speci®c volume will be known. These can be used in the Premoli et al [4] correlation to ®nd the slip ratio and in either the Govan et al [5] or Morris [6] correlations to ®nd the entrained liquid fraction. The procedure outlined in steps 1 to 4 can then be followed to specify the nozzle inlet conditions.…”

Section: The Stagnation Conditionsmentioning

confidence: 99%

“…The annular¯ow correlation of Goven et al [5] was used for vertical up¯ows, and the relationship of Morris [6], i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-phase flow in orifice plates and valves

McNeil

2000

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The pressure drop that occurs when a two-phase flow passes through a pipeline component is usually found by calculating the single-phase value and multiplying it by a two-phase multiplier. Little or no consideration is given to what occurs within that component. For example, if the valve seat area is sufficiently small, the fluid velocity will approach, or even reach, the critical velocity. In these circumstances, compressibility effects should be accounted for—they rarely are. This study was initiated to develop a technique that would allow pressure drops to be predicted for pipe fittings, whether the flow is compressible or not, and to allow the critical mass flux to be estimated, thus allowing the method to be applied to the design of venting systems. The model developed can be used for all pipe fittings of the contraction-expansion type, like orifice plates and valves, up to and including the choking point, provided the single-phase loss coefficient is known.

show abstract

Section: Incompressible Flow In Orifice Platesmentioning

confidence: 93%

Section: The Stagnation Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Two-phase flow in orifice plates and valves

McNeil

2000

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…However, the agreement between the predictions given from the homogeneous model and the experimental data remains poor. To improve the accuracy of this model, Borishanskiy et al [4], Chisholm [5] and Morris [6] have proposed to consider an effective density of mixture rather than the homogeneous density. This effective density is a function of the void fraction or the slip ratio at the orifice.…”

Section: Introductionmentioning

confidence: 99%

A Model for Pressure Drop of Gas-Liquid Bubbly Flow through an Orifice or an Abrupt Pipe Contraction

Attou¹,

Bolle²

1999

Chem. Eng. Technol.

View full text Add to dashboard Cite

A new physical model is developed to predict the pressure drop of a steady-state gas-liquid bubbly flow through an orifice or an abrupt pipe contraction. The formulation of the model involves balance equations deduced from the macroscopic mass, momentum, entropy and energy conservation laws as well as a balance of forces exerted on the dispersed bubbles phase. The thermal equilibrium between phases is assumed but the gas-liquid slip motion is taken into account. The gas-liquid interaction and the wall shear stress are evaluated from theoretical considerations. The predictions of pressure drop from the model are found to be in good agreement with several experimental data of the literature obtained for bubbly air-water flows through orifices. In agreement with the experimental observations, the theoretical predictions show that the two-phase pressure drop multiplier is not strongly influenced by the pipe diameter and increases slightly with the cross-sectional area ratio of the orifice. An essential feature of the present model is the absence of adjustable constants.

show abstract

Compressible gas-liquid flow through pipeline restrictions

Morris¹

1991

Chemical Engineering and Processing: Process Intensification

View full text Add to dashboard Cite

A Simple Model for Estimating Two-Phase Momentum Flux

Cited by 8 publications

References 7 publications

Two-phase flow in orifice plates and valves

Two-phase flow in orifice plates and valves

A Model for Pressure Drop of Gas-Liquid Bubbly Flow through an Orifice or an Abrupt Pipe Contraction

Compressible gas-liquid flow through pipeline restrictions

Contact Info

Product

Resources

About