scholarly journals Momentum-based approximation of incompressible multiphase fluid flows

2017 ◽  
Vol 86 (8) ◽  
pp. 541-563 ◽  
Author(s):  
Loïc Cappanera ◽  
Jean-Luc Guermond ◽  
Wietze Herreman ◽  
Caroline Nore
Keyword(s):  
Fluid Flows ◽  
Multiphase Fluid

Thin structure of heterogeneous and multiphase fluid flows

2012 ◽  
Vol 9 (1) ◽  
pp. 175-180
Author(s):  
Yu.D. Chashechkin
Keyword(s):  
Large Scale ◽  
Fundamental System ◽  
Fluid Flows ◽  
Regular Solutions ◽  
Flow Models ◽  
Group Methods ◽  
Wide Range ◽  
Thin Structure ◽  
Multiphase Fluid ◽  
Complete Solutions

According to the results of visualization of streams, the existence of structures in a wide range of scales is noted: from galactic to micron. The use of a fundamental system of equations is substantiated based on the results of comparing symmetries of various flow models with the usage of theoretical group methods. Complete solutions of the system are found by the methods of the singular perturbations theory with a condition of compatibility, which determines the characteristic equation. A comparison of complete solutions with experimental data shows that regular solutions characterize large-scale components of the flow, a rich family of singular solutions describes formation of the thin media structure. Examples of calculations and observations of stratified, rotating and multiphase media are given. The requirements for the technique of an adequate experiment are discussed.

A Model Constraint for Polydisperse Solids in Multifluid Flows

2015 ◽  
Vol 137 (11) ◽  
Author(s):  
Michael P. Kinzel ◽  
Leonard Joel Peltier ◽  
Brigette Rosendall ◽  
Mallory Elbert ◽  
Andri Rizhakov ◽  
...  
Keyword(s):  
Model Development ◽  
Fluid Flows ◽  
Momentum Exchange ◽  
Carrier Fluid ◽  
Single Carrier ◽  
Cfd Models ◽  
Model Constraint ◽  
Level Model ◽  
Consistency Constraint ◽  
Multiphase Fluid

A method to assess computational fluid dynamics (CFD) models for polydisperse granular solids in a multifluid flow is developed. The proposed method evaluates a consistency constraint, or a condition that an Eulerian multiphase solution for a monodisperse material in a single carrier fluid is invariant to an arbitrary decomposition into a pseudo-polydisperse mixture of multiple, identical fluid phases. The intent of this condition is to develop tests to assist model development and testing for multiphase fluid flows. When applied to two common momentum exchange models, the constraint highlights model failures for polydisperse solids interacting with a multifluid flow. It is found that when inconsistency occurs at the algebraic level, model failure clearly extends to application. When the models are reformulated to satisfy the consistency constraint, simple tests and application-scale simulations no longer display consistency failure.

Modeling the infiltration of multiphase fluid flows in a layered porous medium

2011 ◽  
Vol 3 (1) ◽  
pp. 35-45 ◽  
Author(s):  
N. V. Isupov ◽  
M. A. Trapeznikova ◽  
N. G. Churbanova ◽  
E. V. Shil’nikov
Keyword(s):  
Porous Medium ◽  
Fluid Flows ◽  
Multiphase Fluid

Multiphase Flows Through Poro-Elastic Media: A Continuum Model

2002 ◽  
Author(s):  
Goodarz Ahmadi ◽  
Ali Reza Mazaheri ◽  
Duane H. Smith
Keyword(s):  
Continuum Model ◽  
Fluid Flows ◽  
Second Law Of Thermodynamics ◽  
Present Theory ◽  
Elastic Media ◽  
Balance Laws ◽  
Multiphase Mixture ◽  
Multiphase Fluid ◽  
Liquid Flows ◽  
Special Case

Based on the basic balance laws and the second law of thermodynamics, a model for multiphase fluid flows through poro-elastic media is presented. The basic conservation laws. Including the balance of phasic equilibrated forces are are described. Based on the thermodynamics of the multiphase mixture, appropriate constitutive equations are formulated. It is shown that the present theory leads to the extension of Darcy’s law and contains, as its special case, Biot’s (1957) theory of saturated poro-elastic media. The special case of gas-liquid flows in porous media is discussed.

Wet Gas Formation and Carryover in Compressor Suction Equipment

2021 ◽  
Author(s):  
Griffin Beck ◽  
Nathan Andrews ◽  
A. Grey Berry ◽  
Amy McCleney
Keyword(s):  
Gas Flow ◽  
Liquid Droplet ◽  
Fluid Flows ◽  
Flow Path ◽  
Reciprocating Compressor ◽  
Complex Flow ◽  
Wet Gas ◽  
Multiphase Fluid ◽  
Separation Equipment ◽  
Liquid Formation

Abstract In gas processing, boosting, and gathering applications, gas-liquid separator equipment (typically referred to as a scrubber) is placed upstream of each reciprocating compressor stage to remove water and hydrocarbon condensates. However, field experience indicates that liquids are often still present downstream of the separation equipment. When liquids are ingested into the reciprocating compressor, machinery failures, some of which are severe, can result. While it is generally understood that liquid carryover and condensation can occur, it is less clear how the multiphase fluid moves through equipment downstream of the scrubber. In this paper, mechanisms responsible for liquid formation and carryover into reciprocating compressors are explored. First, the effects of liquid ingestion on reciprocating compressors reported in the open literature are reviewed. Then, the role of heat and pressure loss along the gas flow path is investigated to determine whether liquid formation (i.e., condensation) is likely to occur for two identical compressors with different pulsation bottle configurations. For this investigation, conjugate heat transfer (CHT) models of the suction pulsation bottles are used to identify regions where liquid dropout is likely to occur. Results of these investigations are presented. Next, liquid carryover from the upstream scrubber is considered. Multiphase models are developed to determine how the multiphase fluid flows through the complex flow path within the pulsation bottle. Two liquid droplet size distributions are employed in these models. Descriptions of the modeling techniques, assumptions, and boundary conditions are provided.

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