On the variation of the Hamiltonian functional for an immiscible mixture

1989 ◽  
Vol 105 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Epifanio G. Virga
Keyword(s):  
Immiscible Mixture

AN LBM-BASED INVESTIGATION METHOD FOR THERMAL IMMISCIBLE MIXTURE FLUID FLOW IN RECTANGULAR MULTI-JET CAVITY

2013 ◽  
Vol 28 (01) ◽  
pp. 1350198 ◽  
Author(s):  
AN-LIN WANG ◽  
RUO-FAN QIU ◽  
QIANG CHEN
Keyword(s):  
Fluid Flow ◽  
Contact Area ◽  
Multicomponent System ◽  
Mixture Flow ◽  
Investigation Method ◽  
System A ◽  
Controllable Factors ◽  
Immiscible Mixture ◽  
Boltzmann Method

An investigation method for thermal immiscible mixture fluid flow in rectangular multi-jet cavity using lattice Boltzmann method (LBM) is presented to study influence of controllable factors on quality of mixture generated from the cavity. For immiscible mixture flow, contact area of fluids has great effect on generated mixture. The basic idea is to investigate the relationship between controllable factors and contact area of key components. The contact area is obtained through numerical simulation by an improved LBM, in which temperature equation is extended to multicomponent system. A case study of thermal mixture flow in three-jet cavity using the present method is shown.

Mechanism of Alcohol Displacement of Oil from Porous Media

1961 ◽  
Vol 1 (03) ◽  
pp. 195-212 ◽  
Author(s):  
J.J. Taber ◽  
I.S.K. Kamath ◽  
Ronald L. Reed
Keyword(s):  
Phase Behavior ◽  
Calcium Chloride ◽  
Solid Phase ◽  
Equilibrium Phase ◽  
Water System ◽  
Commercial Application ◽  
Practical Result ◽  
Immiscible Mixture ◽  
Two Phases ◽  
Tie Line

Abstract Alcohol floods of consolidated sandstone cores have shown the process to be strongly dependent on the phase behavior of the particular alcohol-oil-water system used. This means that in many cases the mechanism does not conform to the idea of a piston-like displacement. Instead, it is found that by changing the alcohol it is possible to change the relative velocities of the oil and water and, in fact, the entire mechanism of the process. The effects of rate, viscosity, initial saturation, distance travelled and hysteresis of relative permeability on the alcohol flooding mechanism are discussed. Introduction Reasons for interest in the use of alcohol to miscibly displace oil and water from a porous medium appear in the existing literature. The mechanism of the displacement has been considered and the apparent implications formulated into a theory which presumably would enable one to predict the essential features of the process. Unfortunately, most of the reported experiments have been performed with unconsolidated or artificially consolidated sands. With these systems some of the noteworthy facets of the process are obscured and resulting data appear uncertain. It is the purpose of this paper to show how the use of consolidated sandstones has led to revision of the mechanism and, hence, the theory of alcohol flooding. The practical result is increased pessimism toward the possibilities of commercial application of the simplest form of the alcohol-slug process. However elucidation of the mechanism has made it possible to define the essential characteristics of a system of slugs which will behave in a nearly piston-like fashion and, thus, yield the best possible result. Equilibrium Phase Behavior Fig. 1 is a diagram of the ternary system isopropyl alcohol (IPA)-Soltrol-calcium chloride brine. Brine was used to prevent plugging of the core and calcium chloride was used because sodium chloride brine exhibits a solid phase with Soltrol and IPA. If alcohol is added in increments to the immiscible mixture of water and oil represented by Point A, the path followed by the successively equilibrated samples will be on the Line ABC and pass from the immiscible region to the miscible region by crossing the binodal curve at B. Consider the intersection D of this path with the tie Line EF. The quantity of oleic phase is proportional to the Segment ED and the quantity of the aqueous phase is proportional to DF. Compositions of the two phases are specified by Points E and F. It is clear that in the case shown the oleic phase is diminishing and entirely disappears when miscibility is achieved.

scholarly journals An immiscible mixture

1976 ◽  
Vol 54 (2) ◽  
pp. 2
Author(s):  
ALBERT F. PLANT
Keyword(s):  
Immiscible Mixture

THE EFFECT OF VISCOSITY ON THE PHASE SEPARATION DYNAMICS OF BINARY IMMISCIBLE MIXTURE COUPLED WITH REVERSIBLE REACTION

2010 ◽  
Vol 21 (12) ◽  
pp. 1479-1488 ◽  
Author(s):  
HUI LI ◽  
HONG LIU ◽  
ZHONG-YUAN LU ◽  
QIN WANG ◽  
CHIA-CHUNG SUN
Keyword(s):  
Phase Separation ◽  
Reaction Rate ◽  
Domain Size ◽  
Reaction Rates ◽  
Two Dimensions ◽  
Domain Growth ◽  
Reversible Reaction ◽  
Growth Exponent ◽  
High Reaction ◽  
Immiscible Mixture

The phase-separating system coupled with a simple reversible reaction A ⇌ B in a binary immiscible mixture due to critical quench is investigated with Lowe-Andersen temperature controlling method in two dimensions. The system viscosity strongly influences the asymptotic relationship between the excess energy (characterizing the domain growth) and the reaction rate. The competition between different dynamic factors results in the steady states with characteristic domain sizes. For low viscosities, the domain growth exponent approximates to 0.4 in the cases of low reaction rates and to 0.25 in the cases of high reaction rates, which shows the suppressing effects of high reversible reaction rates on the phase separation. However, in the cases of high viscosities, we find a 0.25 scaling with low reaction rates but a 0.5 scaling with high reaction rates. In these cases, high viscosities prevent mass transport in the binary mixture, consequently result in much smaller steady state domain sizes. Therefore the domain sizes with high viscosities and low reaction rates are very similar to those with low viscosities and high reaction rates, and the dependence of domain sizes on the reaction rates are similar. For the high-viscosity systems with high reaction rates, the domain sizes are predominantly controlled by the reaction rates, therefore we can observe stronger dependence of domain size on the reaction rate.

EXPERIMENTAL STUDY OF A TWO-PHASE CLOSED THERMOSYPHON CHARGED WITH AN IMMISCIBLE MIXTURE

2014 ◽  
Vol 5 (1-4) ◽  
pp. 137-143
Author(s):  
Julia F. Carneiro ◽  
Kenia W. Milanez ◽  
Fernando Milanese ◽  
Marcia B. H. Mantelli
Keyword(s):  
Experimental Study ◽  
Two Phase ◽  
Immiscible Mixture

Synthesis of hexagonal MoO3 nanorods and a study of their electrochemical performance as anode materials for lithium-ion batteries

2015 ◽  
Vol 3 (14) ◽  
pp. 7463-7468 ◽  
Author(s):  
Jianbin Zhou ◽  
Ning Lin ◽  
Liangbiao Wang ◽  
Kailong Zhang ◽  
Yongchun Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Immiscible Mixture

h-MoO3 nanorods with a diameter of 40 nm are synthesized in an immiscible mixture of solutions and exhibit high electrochemical performance.

scholarly journals Fluid Inclusions and Rare Earth Elements (REE) analysis in calcite veins: Tectonic - diagenesis interaction in the Rosablanca formation, Mesa de los Santos sector, eastern cordillera, Colombia

2018 ◽  
Vol 8 (1) ◽  
pp. 31-43 ◽  
Author(s):  
Jairo Conde-Gómez
Keyword(s):  
Rare Earth ◽  
Fluid Inclusion ◽  
Fluid Inclusions ◽  
Early Event ◽  
Fluid Circulation ◽  
Carbonate Cement ◽  
Diagenetic Processes ◽  
Calcite Veins ◽  
Different Types ◽  
Immiscible Mixture

Studies conducted by means of petrography, cathodoluminescence, SEM, fluid inclusion and REE geochemistry in core samples from the Rosablanca Formation in the Mesa de Los  Santos sector, identified two types of material: the host rock classified as Packstones and Grainstones, and veins that texturally expose three types of filling (blocky texture, blocky elongate texture, fibrous texture). Diagenesis is characterized by dissolution, carbonate cement precipitation, compaction, fracturing and fluid circulation through fractures during at least three episodes; these diagenetic processes were contemporaneous with the distensive and compressive tectonic regimes regionally dominant during the Cretaceous, Paleogene and Neogene in the study area. The fluids that generated the different types of texture inside the veins were brines that belonged to the H2O – NaCl – CaCl2 system, with salinities between 0.03 – 12.96 % wt eq NaCl, derived from the Rosablanca Formation that was deposited under oxic conditions, retaining their marine character and implying an autochthonousorigin for the REE present in the veins. The conditions of entrapment for fluid inclusions during the early event were heterogeneous, arising from an immiscible mixture of brines andhydrocarbons, while in the second, they were homogeneous with later post-entrapment processes.later post-entrapment processes.

scholarly journals Mustafa Ozsipahi, Sertac Cadirci, Hasan Gunes, Husnu Kerpicci, Kemal Sarioglu

2020 ◽  
Vol 7 ◽  
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Internal Surface ◽  
Suction Side ◽  
Oil Viscosity ◽  
Two Phase ◽  
Oil Film ◽  
Lubricant Oil ◽  
Immiscible Mixture

The aim of this study is to numerically investigate theeffects of various parameters on the lubricant (oil)-coolant two phaseflow in the lubrication system of hermetic compressors commonlyused on household refrigerators. Lubrication oil is pumped from thesump through an asymmetrically opened hole on the bottom of thecrankshaft (suction side or inlet) by its rotational motion and climbsas an oil film on the internal surface of the helical channel carved onthe crankshaft surface. This oil film is directed to crankshaft upperexit discharging into the coolant refrigerant and it is used tolubricate the moving components of the compressor including thecylinder piston. The oil forms an immiscible mixture with coolant,thus a two phase flow model using Volume of Fluid (VOF) method isused. Specifically, the mass flow-rate of oil is determined as afunction of the rotational speed, oil viscosity and the submersiondepth of the crankshaft in the oil-sump. With increasing rotationalspeed and submersion depth, the mass flow-rate through thecrankshaft upper exit also increases. With increasing oil viscosity themass flow-rate through the crankshaft upper exit decreases due to theincreased friction.

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