The MIXING pattern of two parallel gas streams initially separated by a splitter plate is analyzed in this study. A recently proposed, two-FLUID model is utilized for simulation of the flow field. The model provides separate balance equations for each component species of the system. As a consequence of the strong resemblance of the two-FLUID model to the Navier-Stokes equations, the same numerical methods are applied to these new equations. The computations are undertaken for two-FLUID systems, one with particles of about equal masses and another with particles of quite distinct masses, and the corresponding results are compared. This clarifies how the mass disparity of the constituents may affect the establishment of the flow field. The influence of molecular interaction descriptions in the model predictions is also examined by comparing the results of a hard-sphere model, the Maxwell repulsive potential, and the Lennard-Jones 12-6 potential.

Kushk sulfide Zn-Pb ore deposit is located in the Posht-e-Badam block, in the central Iranian tectono-magmatic zone. The host rocks of the ore deposit include shale, sandstone and dolomite. In order to investigate the physicochemical condition controlling the formation of the sulfide ore, a number of FLUID inclusions were gathered from silicic thin layers. The silicic contents of the samples have contemporaneously been deposited with shale and sulfide minerals mainly in the footwall and the main mineralized horizon. In this research, the general properties of FLUID inclusions in the ore-forming system are taken into account and the interpretation of these data in terms of FLUID evolution processes is discussed. Considering the syngenetic formation of the silicic thin layers and the mineralized shale, a similar formation condition can be considered for both of these units. Based on the results, two types of FLUIDs were involved in the formation of the silicic thin layers, including FLUID 1 that is characterized by higher salinity (av. 38. 8% NaCl. eq) and is thought to transport the metals chloride complexes and FLUID 2 with lower salinity (av. 4. 46% NaCl. eq) and is thought to carry sulfide species. Part of sulfide in this type of FLUID could be originated from bacterial activity. Isothermal MIXING of the two FLUIDs sequencially resulted in destabilization of chloride complexes of chalcophile elements, the reaction between the elements and sulfur originated from the low salinity FLUID and formation of the sulfide ore.

In this study, the MIXING phenomena in a physical model and FLUID dynamics in a copper converter were experimentally investigated using a physical model. The physical model is a 1: 5 horizontal tank made of Plexiglas. The MIXING phenomena were characterized by experimentally measuring the MIXING time using a tracer dispersion technique. Moreover, the effects of the air flow rate and lance submergence on the slopping in the model were studied. The experiments were carried out for the air flow rates of 10, 15, 17 and 20 l/min with the lance submergences of 8.5, 9.5, 10.5 and 11.5 cm. The results showed that the MIXING time decreased with increasing both air flow rate and lance submergence. In addition, the slopping reduced as the lance submergence increased while the air flow rate decreased. Based on the results of the MIXING time and the slopping, an optimum condition for air injection was obtained which not only ensured the sufficient MIXING, but also resulted in less slopping in the model. Furthermore, the MIXING times were evaluated in terms of the specific MIXING power. A correlation was established for estimating the MIXING time in the model with respect to the specific MIXING power.

Objective: In this article, a numerical study is conducted on MIXING of two FLUIDs in the liquid phase with two different concentrations of a chemical species in the electro-osmotic flow.Methods: The base liquid is an electrolyte which flows in a two-dimensional micro-channel having electrically charged walls. Lorentz electric force, which is used as stimulating flow factor, is created by applying an external electric field on the electric double layer (EDL) aroused by adjacency of electrolyte and charged wall.Results: To ensure the convergence of the results obtained from the computer program, equations are solved iteratively until the residual amount after solving each equation is less than machine error and independence of results from the number and location of network nodes is verified for an experimental flow. To increase the MIXING efficiency, some square and triangle shaped obstacles are embedded on the micro channel wall. Herein, the fundamental principles for passive MIXING as well as the effect of frequency and height of the barriers on MIXING efficiency are studied. The obtained results from numerical solving of electro-osmotic flow in micro-channel are compared with the theoretical results and a very good agreement is observed.

The significance of preparing representative reservoir FLUIDs in optimizing reservoir management is clearly obvious for experts, and it has always been tried to prepare a representative FLUID at the early life of reservoir by standard methods. This will lead to the reduction of inaccuracy and causes an appropriate prediction of phase and flow behavior of reservoir. Methods of preparing an original reservoir FLUID are mentioned in various standards like API-RP44 in details. These methods are on the basis of stabilizing reservoir and sampling conditions. In 1994, Fevang and Whitson presented a new method titled equilibrium contact MIXING (ECM). They claimed that this method was operational for gas condensate reservoirs in any conditions. Their method reversed the dominant standards of sampling and had no time limitation in preparing representative FLUID from the collected samples. This paper examines ECM techniques and checks the verity of this method in various conditions. For this purpose, a synthetic model consists of lean and rich gas condensate reservoirs in saturated and under saturated conditions and surface separator facilities are constructed. After production and sampling from models, ECM and recombination techniques are simulated and used for synthesizing original FLUIDs from the collected samples. Evaluating the methods of synthesizing original reservoir FLUIDs states that the new and non-familiar ECM techniques are remarkably more accurate than the conventional recombination method in any conditions, particularly in a depleted situation. The accurate obtained results suggest proposing this method to petroleum companies.

In the present study, the MIXING of two incompressible miscible FLUIDs with different density andviscosity has been investigated in a two-dimensional microchannel equipped with an oscillating stirrerin different excitation frequencies. Although most studies in the field of FLUID MIXING have studied themixer performance when the two FLUIDs were absolutely identical, the MIXING makes sense when twoFLUIDs have non-uniformity such as different temperature, concentration or properties. The aim of thisstudy is to evaluate the effect of various properties of the FLUIDs in mixer performance and MIXING value.Simulation has been performed in Re=100 and Sc=10, between 0.1 and 1 Strouhal number by usingelement based finite volume method by means of commercial code CFX. Mixer performance has beenevaluated in three different modes: MIXING of two identical FLUIDs, MIXING of two FLUIDs with differentdensity and MIXING of two FLUIDs with different viscosity. The results show that, MIXING of the FLUIDswith different properties leads to change in mixer performance, and has unique performance in eachcase. In comparison with similar properties FLUIDs, MIXING of FLUIDs with different viscosity and densityshow lesser tendency in MIXING. It has been shown that variation of Strouhal number has lesser effect onMIXING index changes. The ratio of maximum MIXING index changes to base MIXING index in the case ofdifferent density and viscosity is 54.01 and 51.15 percent, respectively, while the value is 577.94percent for the MIXING of similar FLUIDs.

In this article, MIXING in the combined electroosmotic/pressure driven flows of non-Newtonian FLUID in a micro channel with rectangular obstacles and non-homogeneous ζ-potential has been studied numerically. The non-Newtonian behavior of the FLUID is considered for the flow field using power law rule. Also, the nonlinear Poisson-Boltzmann equation is used to model the distribution of ions across the channel and the electric potential. Numerical solutions of coupled equations of momentum, electric field and concentration field are performed by means of finite element method. In this study, the effects of various parameters such as pressure gradient, rheological behavior of the FLUID and the geometrical and physical parameters of obstacles on the MIXING quality are investigated. The results indicate that applying adverse pressure gradient to the flow, the dilatant behavior of the FLUID, as well as the height of barriers, is highly effective in the enhancement of the MIXING quality within the microchannel. It is found that for microchannels with heterogeneous V-potential, increasing the length of obstacles significantly increases the MIXING efficiency while for the microchannels with homogeneousV-potential, barrier length has a slight effect on MIXING efficiency.

The IIeh Iron ore deposit is located about 250 km SE of Mashhad and 49 km SW of Taibad (Khorasan Razavi province). The oldest exposed rock unit belong to late Proterozoic and are meta volcano-sedimentary complexes with metamorphic grade of green schist facies. The other outcrops are granites with Upper Eocene age which cut the complex. The granitic bodies are calc-alkaline, high-K, peraluminous to meta aluminous, and characterized by negative Eu anomaly, the magnetite- series (I-Type) granites, are related to continental- margin subduction zones with the lower crust source. The homogenization temperatures (Th) obtained from FLUID inclusions in calcite and quartz ranges from 200-385oC with mode of 300-320oC. Two salinity ranges of 4-6 and 28-38 NaCl eq. Wt% are observed in quartz and calcite, respectively, implying an possible FLUID-MIXING event. The occurrence of hematite could be taken as evidence for extremely oxidizing conditions and the possible derivation from a magmatic source during the trapping event. Based on XRD and thin- section studies, the altered rocks around ore deposits show sericitization, chloritization, illitization, kaolinitization, silicification and montmorillonitization are the main alteration types. This study suggestsa K-Fe-Mg-Si-Ca composition for the ore-bearing FLUIDs. Further proof for the hydrothermal-origin of the ore-bearing FLUIDs is indicated by the positive Eu anomaly in the respected REE abundance pattern of ore samples.

MIXING is one of the more practice operations in chemical processes and knowledge of FLUID flow profile can help for optimizing the operation considerably. In process of preparation of sodium perborate, Sodium metaborate and hydrogen peroxide, as raw materials, mix and react in presence of a turbine mixer. In this investigation, the role of presence of baffle in velocity profile in MIXING tank including a turbine agitator with two impellers has been studied. Regarding this matter, velocity vectors and counters of different sections of tank in two cases; with and without baffles, have been drawn with the aid of computation FLUID dynamic (CFD) method. The results show that radial velocities are the same for two cases but presence of baffle affects on vertical velocity. In the other words, baffle can increase turbulence in vertical axe.