Статті в журналах: "Mixture Critical Point"

1

Wilding, Nigel B. "Critical end point behavior in a binary fluid mixture." Physical Review E 55, no. 6 (June 1, 1997): 6624–31. http://dx.doi.org/10.1103/physreve.55.6624.

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2

Sidky, Hythem, Jonathan K. Whitmer, and Dhagash Mehta. "Reliable mixture critical point computation using polynomial homotopy continuation." AIChE Journal 62, no. 12 (June 3, 2016): 4497–507. http://dx.doi.org/10.1002/aic.15319.

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3

Tariq, Mohammad, and Vinod Kumar Nema. "Theoretical investigation of a combined Kalina and vapour-absorption cycle." Journal of Energy in Southern Africa 26, no. 1 (March 23, 2015): 113–24. http://dx.doi.org/10.17159/2413-3051/2015/v26i1a2227.

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A program has been developed to calculate enthalpies at the salient points (later referred to as stations) of a combined power and cooling cycle provided pressure, temperature, mixture concentration and condition are known at these points. The ammonia-water mixture, which is taken as the working fluid, may be at one of the following seven conditions namely, superheated vapour mixture, mixture of superheated component of ammonia and pseudo vapour component of water, saturated vapour mixture, wet vapour mixture, saturated liquid mixture, mixture of subcooled water and pseudo liquid ammonia and subcooled mixture of subcooled components of ammonia and water. The mixture boiling-point temperature and dew-point temperature, needed to establish the condition of the working fluid, are functions of absolute pressure, critical pressure and critical temperature of the mixture; later two depend on the mixture concentration and the corresponding critical values of water at the given station. Using typical values of the variables as listed above, enthalpies at all stations are predicted. The predicted enthalpies are close (within 3%) to those available in the literature except at two stations where the mixture was weak in ammonia and its temperature was either in the near vicinity of the mixture boiling-point temperature or below the saturation temperature of pure ammonia at the concerned pressure. Using the predicted values of enthalpies, thermal efficiency of the combined power and cooling cycle has been calculated.

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4

Grine, Hichem, and Hakim Madani. "Method for prediction of liquid-vapor critical points in binary mixtures: geometrical-EOS model." High Temperatures-High Pressures 51, no. 1 (2022): 39–61. http://dx.doi.org/10.32908/hthp.v51.1125.

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A new method for predicting the Liquid- Vapor critical point of binary mixture, is presented, which is based in geometrical distances. Actually, the method is based on the minimization of the distance between the experimental and calculated values of the critical temperatures and critical pressures. The SRK and PR equations of state along with classical mixing rules of van der Waals were used as thermodynamic models to calculate the critical point of a given mixture. The proposed method requires that the mixture parameters a, b, and the covolume ε = b/v of each equation of state be determined at each iteration by solving the resulting cubic equation. For nine binary mixtures containing: hydrocarbon derivatives, carbon dioxide and alcohols are studied. The AARE of the calculated values is about 0.86% for critical temperature and 2.07% for critical pressure. Good agreements are found between the calculated results and experimental data. The technique is a general purpose one and can be applied in connection with other thermodynamic models.

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5

Chan, C. K., W. I. Goldburg, and J. V. Maher. "Light-scattering study of a turbulent critical binary mixture near the critical point." Physical Review A 35, no. 4 (February 1, 1987): 1756–65. http://dx.doi.org/10.1103/physreva.35.1756.

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6

Yamamoto, Takao, Motoki Noguchi, Yasuyuki Maki, and Toshiaki Dobashi. "Gel Volume Near the Critical Point of Binary Mixture Isobutyric Acid–Water." Gels 6, no. 3 (September 12, 2020): 30. http://dx.doi.org/10.3390/gels6030030.

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The volume of a cylindrical polyacrylamide gel was measured when immersed in a binary mixture of isobutyric acid–water at different temperatures and weight fractions of isobutyric acid. Near the upper critical solution temperature of the binary mixture, the curve for gel volume vs. isobutyric acid weight fraction has a shoulder or a peak near the critical weight fraction. On the other hand, in a region away from the critical temperature, the gel volume decreased monotonically with increasing isobutyric acid weight fraction. The cloud point temperature of the binary mixture inside the gel was lower than that outside the gel. Thermodynamic description for the gel in the critical mixture is derived on the basis of the Ising model. By the description, the experimental results are explained consistently. The theoretical analysis shows that the shoulder and the peak appearing in the swelling behavior of the gel are respectively induced by the criticalities of the binary mixture outside and inside the gel. It also shows that the cloud point temperature lowering of the binary mixture inside the gel is attributed to the effective enhancement of the temperature of the binary mixture inside the gel induced by the presence of the gel polymer.

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7

To, Kiwing, and Hyoung J. Choi. "Polymer Conformation near the Critical Point of a Binary Mixture." Physical Review Letters 80, no. 3 (January 19, 1998): 536–39. http://dx.doi.org/10.1103/physrevlett.80.536.

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8

Jost, Antoine Michael Diego, Stéphane Glockner, and Arnaud Erriguible. "Direct numerical simulations of fluids mixing above mixture critical point." Journal of Supercritical Fluids 165 (November 2020): 104939. http://dx.doi.org/10.1016/j.supflu.2020.104939.

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9

Ermakova, A., and V. I. Anikeev. "Calculation of spinodal line and critical point of a mixture." Theoretical Foundations of Chemical Engineering 34, no. 1 (January 2000): 51–58. http://dx.doi.org/10.1007/bf02757464.

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10

Thanh, Luong Duy, and Rudolf Sprik. "Streaming Potential Measurements on the Binary Mixture Triethylamine-Water Near the Demixing Phase Transition." International Journal of Geophysics 2019 (April 22, 2019): 1–8. http://dx.doi.org/10.1155/2019/6067201.

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Large density fluctuations developing near the phase transition point of the binary mixture affect physical parameters directly related to the electrokinetic coupling coefficient. Here the first electrokinetic measurements for a porous rock sample are carried out with a critical binary mixture of triethylamine-water, especially around the phase transition point. From the measured streaming potential coefficient, the zeta potential is obtained for the critical composition. The results show that there is no anomaly in the streaming potential coefficient as the temperature approaches the demixing temperature. It is also seen that the streaming potential coefficient and the zeta potential in magnitude decreases with increasing temperature. This observation is opposite to what has been observed in literature. It means that the properties of the electric double layer for the mixtures are different from those for aqueous electrolytes. Additionally, the zeta potential for the critical composition is predicted to fluctuate around the critical point.

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11

Hardcastle, F. D., and J. M. Harris. "Thermal Lens Absorption Measurements in Binary Liquid Mixtures near the Consolute Critical Point." Applied Spectroscopy 40, no. 5 (July 1986): 606–11. http://dx.doi.org/10.1366/0003702864508692.

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Binary liquid mixtures near their consolute critical points are shown to possess desirable thermophysical properties for thermal lens absorption measurements. By use of a 2,6-dimethylpyridine/water mixture near critical composition and temperature, sensitivity was found to be enhanced relative to pure liquids by the Soret effect in which a concentration gradient is created between the two solvent components by thermally induced mass diffusion within the laser-excited temperature gradient. A 35-fold increase in sensitivity relative to a thermal expansion lens effect in pure water was obtained. A mechanism of phase separation unique to the critical point region known as spinodol decomposition was observed, as the sample temperature was driven above the critical point by laser excitation. This phenomenon was also found to be a potentially useful spectrophotometric technique for the thermooptical detection of small absorbances.

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12

Kulikov, V. D. "The study of the behavior of the volume fraction of the liquid phase and its pressure derivative on isotherms and dew–bubble curve of a binary mixture in the framework of scaling theory." Actual Problems of Oil and Gas, no. 36 (May 4, 2022): 7–24. http://dx.doi.org/10.29222/ipng.2078-5712.2022-36.art1.

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In the framework of fluctuation theory of phase transitions (scaling theory) and isomorphism principle of critical phenomena, a simple analytical expressions for the volume fraction of the liquid phase vL in two-phase region as well as its pressure derivative (∂vL/∂P)T,x were obtained in binary mixtures on isotherms and on the dew–bubble curve in the vicinity of liquid–gas critical point. The pressure-dependent explicit expressions for the studied values were derived in the main approximation at fixed temperature along with the expression obtained for the above-mentioned derivative on the dew–bubble curve of a mixture. A simple relation between the light-scattering intensity and the derivative (∂vL/∂P)T,x on the dew–bubble curve of a binary mixture in the vicinity of liquid–gas critical point was established.

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13

Kulikov, V. D. "The study of light-scattering intensity on the dew-bubble curve of a binary mixture in the framework of scaling theory." Actual Problems of Oil and Gas, no. 32 (April 21, 2021): 16–25. http://dx.doi.org/10.29222/ipng.2078-5712.2021-32.art2.

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In the framework of scaling theory and the principle of isomorphism of critical phenomena in mixtures, the analytical expression for the light-scattering intensity in a binary fluid mixture has been obtained in rather wide vicinity of its liquid–gas critical point. The deduced validity condition for the light-scattering intensity as an explicit function of temperature or density reveals the adequacy of the description of the obtained experimental data for the methane–pentane binary mixture. The good agreement between the theory and the experiment has been demonstrated. The critical temperature and density values were obtained as a result of optimization procedure.

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14

Gorbunov, A. A., V. M. Emelyanov, and A. K. Lednev. "EQUATION OF STATE OF A BINARY MIXTURE NEAR THE CRITICAL POINT." International Journal of Applied and Fundamental Research (Международный журнал прикладных и фундаментальных исследований), no. 9 2022 (2022): 91–95. http://dx.doi.org/10.17513/mjpfi.13446.

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15

Gouin, Henri, Augusto Muracchini, and Tommaso Ruggeri. "Travelling waves near a critical point of a binary fluid mixture." International Journal of Non-Linear Mechanics 47, no. 1 (January 2012): 77–84. http://dx.doi.org/10.1016/j.ijnonlinmec.2011.09.016.

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16

Narayanan, T., A. Kumar, S. Venkatachalam, J. Jacob, and B. V. Prafulla. "Exploration of a quadruple critical point in a quaternary liquid mixture." Journal of Chemical Physics 102, no. 24 (June 22, 1995): 9653–58. http://dx.doi.org/10.1063/1.468784.

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17

Melnyk, R. S., and O. V. Patsahan. "Vapor-liquid critical-point properties of a symmetric binary fluid mixture." Theoretical and Mathematical Physics 124, no. 2 (August 2000): 1145–56. http://dx.doi.org/10.1007/bf02551084.

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18

Brémaud, Pierre, and Laurent Massoulié. "Hawkes branching point processes without ancestors." Journal of Applied Probability 38, no. 1 (March 2001): 122–35. http://dx.doi.org/10.1239/jap/996986648.

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In this article, we prove the existence of critical Hawkes point processes with a finite average intensity, under a heavy-tail condition for the fertility rate which is related to a long-range dependence property. Criticality means that the fertility rate integrates to 1, and corresponds to the usual critical branching process, and, in the context of Hawkes point processes with a finite average intensity, it is equivalent to the absence of ancestors. We also prove an ergodic decomposition result for stationary critical Hawkes point processes as a mixture of critical Hawkes point processes, and we give conditions for weak convergence to stationarity of critical Hawkes point processes.

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19

Brémaud, Pierre, and Laurent Massoulié. "Hawkes branching point processes without ancestors." Journal of Applied Probability 38, no. 01 (March 2001): 122–35. http://dx.doi.org/10.1017/s0021900200018556.

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In this article, we prove the existence of critical Hawkes point processes with a finite average intensity, under a heavy-tail condition for the fertility rate which is related to a long-range dependence property. Criticality means that the fertility rate integrates to 1, and corresponds to the usual critical branching process, and, in the context of Hawkes point processes with a finite average intensity, it is equivalent to the absence of ancestors. We also prove an ergodic decomposition result for stationary critical Hawkes point processes as a mixture of critical Hawkes point processes, and we give conditions for weak convergence to stationarity of critical Hawkes point processes.

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20

Kuleznev, V. N., and L. B. Kandyrin. "Mechanical behaviour of polymer mixtures in the phase separation region." Canadian Journal of Chemistry 73, no. 11 (November 1, 1995): 1966–71. http://dx.doi.org/10.1139/v95-243.

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The liquid–liquid phase transition triggered by changes in the composition of polymer mixtures in solution or melt is often accompanied by "critical" opalescence, which signals the appearance of a microemulsion in the mixture. The viscosity of the polymer mixture in this region is characterized by a sharp minimum, observed, as a rule, over an extremely narrow range of concentration. Depending on the concentration of the solution, the type of polymer, and the solvent, the viscosity may decrease by a factor of 8–10. On transition from micro- to macro-separation, viscosity rapidly increases back to the original level. Changes in the composition of the mixture can alter the concentration at which phase separation occurs, but the minimum in viscosity invariably corresponds to the moment of phase separation. The critical opalescence region represents the formation of phase particles up to 80–100 nm in size, and this corresponds to the point of viscosity drop. This effect is due to the appearance of thermodynamically stable microemulsions in the polymer mixture, in the region between the binodal and the spinodal in the phase diagram. These emulsions are characterized by lower molecular interaction of incompatible polymers in the highly developed interfacial layer. Extremal changes at the point of phase separation are also observed for other mechanical characteristics of polymer mixtures in solutions or melts, for example, G′ and G″ dynamic moduli or complex viscosity η*. Keywords: polyblends, critical phenomena, viscosity, emulsions, phase separation.

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21

Fujitani, Youhei. "Diffusiophoresis in a near-critical binary fluid mixture." Physics of Fluids 34, no. 4 (April 2022): 041701. http://dx.doi.org/10.1063/5.0082991.

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We consider placing a rigid spherical particle into a binary fluid mixture in the homogeneous phase near the demixing critical point. The particle surface is assumed to have a short-range interaction with each mixture component and to attract one component more than the other. Owing to large osmotic susceptibility, the adsorption layer, where the preferred component is more concentrated, can be of significant thickness. This causes a particle motion under an imposed composition gradient. Thus, diffusiophoresis emerges from a mechanism which has not been considered so far. We calculate how the mobility depends on the temperature and particle size.

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22

Alekhin, Bulavin, Konvay, and Malyarenko. "THE PARTICULARITIES OF BINARY MIXTURE COMPONENT MOVEMENT NEAR THE EXFOLIATION CRITICAL POINT." Condensed Matter Physics, no. 8 (1996): 11. http://dx.doi.org/10.5488/cmp.8.11.

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23

Bellini, Tommaso, and Vittorio Degiorgio. "Electric birefringence of a binary liquid mixture near the critical consolute point." Physical Review B 39, no. 10 (April 1, 1989): 7263–65. http://dx.doi.org/10.1103/physrevb.39.7263.

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24

Pousaneh, Faezeh, Olle Edholm, and Anna Maciołek. "Molecular dynamics simulation of a binary mixture near the lower critical point." Journal of Chemical Physics 145, no. 1 (July 7, 2016): 014501. http://dx.doi.org/10.1063/1.4954768.

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25

Bakhtadze, A. G., and V. P. Kovtun. "Temperature dependence of distribution coefficient of binary mixture close to critical point." Soviet Atomic Energy 67, no. 5 (November 1989): 849–50. http://dx.doi.org/10.1007/bf01126140.

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26

Akasaka, Ryo. "Calculation of the critical point for mixtures using mixture models based on Helmholtz energy equations of state." Fluid Phase Equilibria 263, no. 1 (January 2008): 102–8. http://dx.doi.org/10.1016/j.fluid.2007.10.007.

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27

Orzechowski, Kazimierz. "Electrical properties of an ethanol–dodecane mixture near the upper critical solution point." J. Chem. Soc., Faraday Trans. 90, no. 18 (1994): 2757–63. http://dx.doi.org/10.1039/ft9949002757.

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28

Orzechowski, Kazimierz. "Measurements of Dielectric Permittivity Near the Consolute Critical Point of Methanol-Cyclohexane Mixture." Berichte der Bunsengesellschaft für physikalische Chemie 92, no. 8 (August 1988): 931–34. http://dx.doi.org/10.1002/bbpc.198800222.

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29

Riipinen, I., N. Rastak, and S. N. Pandis. "Connecting the solubility and CCN activation of complex organic aerosols: a theoretical study using the Solubility Basis Set (SBS)." Atmospheric Chemistry and Physics Discussions 14, no. 21 (November 17, 2014): 28523–69. http://dx.doi.org/10.5194/acpd-14-28523-2014.

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Abstract. We present a theoretical study investigating the cloud condensation nucleus (CCN) activation of multicomponent organic mixtures. We modeled these complex mixtures using the solubility basis set (SBS, analogous to the volatility basis set VBS), describing the mixture as a set of surrogate compounds with varying water-solubilities in a given range. We conducted Köhler theory calculations for 144 different mixtures with varying solubility range, number of components, assumption about the organic mixture thermodynamics and the shape of the solubility distribution, yielding approximately 6000 unique CCN-activation points. The results from these comprehensive calculations were compared to three simplifying assumptions about organic aerosol solubility: (1) complete dissolution at the point of activation, (2) combining the aerosol solubility with the molar mass and density into a single hygroscopicity parameter κ, (3) assuming a fixed water-soluble fraction &varepsilon;eff. While the complete dissolution was able to reproduce the activation points with a reasonable accuracy only when the majority (70–80%) of the material was dissolved at the point of activation, the single parameter representations of complex mixture solubility were confirmed to be powerful semi-empirical tools for representing the CCN activation of organic aerosol. Depending on the condensed-phase interactions between the organic molecules, material with solubilities larger than about 1–10 g L−1 could be treated as completely soluble in the CCN activation process over particle dry diameters between 20 and 500 nm and supersaturations between 0.03 and 8%. Our results indicate that understanding the details of the solubility distribution in the range of 0.1 to 100 g L−1 is critical for capturing the CCN activation, while resolution outside this solubility range will probably not add much information except in some special cases. The connection of these results to the previous observations of the CCN activation of complex organic mixture aerosols is discussed.

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30

Witala, Monika, Jun Han, Andreas Menzel, and Kim Nygård. "In situsmall-angle X-ray scattering characterization of X-ray-induced local heating." Journal of Applied Crystallography 47, no. 6 (October 17, 2014): 2078–80. http://dx.doi.org/10.1107/s1600576714020159.

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It is shown that small-angle X-ray scattering from binary liquid mixtures close to the critical point of demixing can be used forin situcharacterization of beam-induced heating of liquid samples. For demonstration purposes, the proposed approach is applied on a well studied critical mixture of water and 2,6-lutidine. Given a typical incident X-ray flux at a third-generation synchrotron light source and using a 1.5 mm-diameter glass capillary as sample container, a beam-induced local temperature increase of 0.45 ± 0.10 K is observed.

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31

Il’ina, S. G., I. V. Tret’yakova, and V. A. Petrova. "Properties of the adsorption layer in a binary liquid mixture near the critical point." Moscow University Physics Bulletin 66, no. 2 (April 2011): 180–83. http://dx.doi.org/10.3103/s0027134911020068.

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32

Jaffar Ali, B. M., and A. Kumar. "Light scattering investigations in a ternary liquid mixture: Quest for a critical inflection point." Journal of Chemical Physics 107, no. 19 (November 15, 1997): 8020–29. http://dx.doi.org/10.1063/1.475065.

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33

Rouch, J., P. Tartaglia, and S. H. Chen. "Experimental evidence of nonexponential relaxation near the critical point of a supramolecular liquid mixture." Physical Review Letters 71, no. 12 (September 20, 1993): 1947–50. http://dx.doi.org/10.1103/physrevlett.71.1947.

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34

Zhang, Kai C., Matthew E. Briggs, Robert W. Gammon, and J. M. H. Levelt Sengers. "The susceptibility critical exponent for a nonaqueous ionic binary mixture near a consolute point." Journal of Chemical Physics 97, no. 11 (December 1992): 8692–97. http://dx.doi.org/10.1063/1.463387.

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35

Utt, Nathan J., S. Y. Lehman, and D. T. Jacobs. "Heat capacity of the liquid-liquid mixture nitrobenzene and dodecane near the critical point." Journal of Chemical Physics 127, no. 10 (September 14, 2007): 104505. http://dx.doi.org/10.1063/1.2766941.

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36

Potoff, Jeffrey J., and Athanassios Z. Panagiotopoulos. "Critical point and phase behavior of the pure fluid and a Lennard-Jones mixture." Journal of Chemical Physics 109, no. 24 (December 22, 1998): 10914–20. http://dx.doi.org/10.1063/1.477787.

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37

Pura, B., J. Przedmojski, K. Wentowska, A. Jablonka, and R. Dabrowski. "X-Ray Critical Scattering in the 4DBT/12DBT Binary Mixture Near the INA Point." Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 192, no. 1 (January 1, 1990): 13–17. http://dx.doi.org/10.1080/00268949008035599.

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38

Sorensen, C. M., and G. A. Larsen. "Light scattering and viscosity studies of a ternary mixture with a double critical point." Journal of Chemical Physics 83, no. 4 (August 15, 1985): 1835–42. http://dx.doi.org/10.1063/1.449371.

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39

Patsahan, O. V., M. P. Kozlovskii, and R. S. Melnyk. "Ab initiostudy of the vapour-liquid critical point of a symmetrical binary fluid mixture." Journal of Physics: Condensed Matter 12, no. 8 (February 10, 2000): 1595–612. http://dx.doi.org/10.1088/0953-8984/12/8/303.

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40

Braganza, Clinton I., and D. T. Jacobs. "Turbidity of the liquid–liquid mixture perfluoroheptane and 2,2,4-trimethylpentane near the critical point." Journal of Chemical Physics 117, no. 21 (December 2002): 9876–79. http://dx.doi.org/10.1063/1.1518009.

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41

Mainzer-Althof, T., and D. Woermann. "Surface tension of a binary liquid mixture in the vicinity of its critical point." Berichte der Bunsengesellschaft für physikalische Chemie 101, no. 7 (July 1997): 1014–18. http://dx.doi.org/10.1002/bbpc.19971010705.

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42

Wu, Jianming, Hao Sun, Lixia Wan, Jiangang Yang, and Shuyi Wang. "Study on Low-Temperature and Fatigue Performance of High RAP Content Hot Recycled Asphalt Mixture Based on the Degree of Blending (DOB)." Polymers 14, no. 21 (October 25, 2022): 4520. http://dx.doi.org/10.3390/polym14214520.

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This paper selected three kinds of AC-20 hot-mix recycled asphalt mixtures with high RAP content (30%, 40%, and 50%). It obtains a mixture of different degrees of miscibility by changing RAP preheating temperatures and mixing temperatures. The calculation formula of the degree of blending (DOB) of RAP asphalt interface recycling is proposed. The DSR test quantitatively characterized the DOB mixture’s low temperature, and fatigue properties were tested by beam bending test and four-point bending fatigue test. The prediction models of the recycled mixture’s low temperature and fatigue properties were proposed. The RAP preheating temperature is the most critical factor that dominates both transfers of RAP asphalt to the surface of new aggregate and the effective blending of old and new asphalt. DOB has a significant great influence on low-temperature performance and fatigue performance. The DOB of recycled asphalt can be improved by adjusting and optimizing the process parameters of plant hot recycled mixture to effectively improve the recycled mixture’s low-temperature crack resistance and fatigue lifetime. The optimal RAP dosage and mixing process of required performance can be obtained based on the prediction models to save experimental time and cost.

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43

Fujimoto, Hitoshi, Satoshi Ogawa, Hirohiko Takuda, and Natsuo Hatta. "Operation Performance of a Small Air-Lift Pump for Conveying Solid Particles." Journal of Energy Resources Technology 125, no. 1 (March 1, 2003): 17–25. http://dx.doi.org/10.1115/1.1514498.

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The pump performance of a small air-lift system for conveying solid particles is investigated experimentally. The total length of the vertical lifting pipe is 3200 mm, and the inner diameter of the pipe is 18 mm. The gas injector is set at a certain point of the pipe. The flows in the lifting pipe are water/solid two-phase mixtures below the gas injection point, and air/water/solid three-phase mixtures above it. The time-averaged characteristics of the flows are examined for various experimental conditions. The effects of particle diameter, particle density, the gas-injection point, and the volume flux of air on the pump performance are studied systematically. The critical boundary at which the particles can be lifted is discussed in detail based upon one-dimensional mixture model.

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44

Guardone, Alberto, Piero Colonna, Emiliano Casati, and Enrico Rinaldi. "Non-classical gas dynamics of vapour mixtures." Journal of Fluid Mechanics 741 (February 13, 2014): 681–701. http://dx.doi.org/10.1017/jfm.2013.13.

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AbstractThe non-classical gas dynamics of binary mixtures of organic fluids in the vapour phase is investigated for the first time. A predictive thermodynamic model is used to compute the relevant mixture properties, including its critical point coordinates and the local value of the fundamental derivative of gas dynamics $\Gamma $. The considered model is the improved Peng–Robinson Stryjek–Vera cubic equation of state, complemented by the Wong–Sandler mixing rules. A finite thermodynamic region is found where the nonlinearity parameter $\Gamma $ is negative and therefore non-classical gas dynamics phenomena are admissible. A non-monotone dependence of $\Gamma $ on the mixture composition is observed in the case of binary mixtures of siloxane and perfluorocarbon fluids, with the minimum value of $\Gamma $ in the mixture being always larger than that of its more complex component. The observed dependence indicates that non-ideal mixing has a strong influence on the gas dynamics behaviour, either classical or non-classical, of the mixture. Numerical experiments of the supersonic expansion of a mixture flow around a sharp corner show the transition from the classical configuration, exhibiting an isentropic rarefaction fan centred at the expansion corner, to non-classical ones, including mixed expansion waves and rarefaction shock waves, if the mixture composition is changed.

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45

Zemb, Thomas, Rose Rosenberg, Stjepan Marčelja, Dirk Haffke, Jean-François Dufrêche, Werner Kunz, Dominik Horinek, and Helmut Cölfen. "Phase separation of binary mixtures induced by soft centrifugal fields." Physical Chemistry Chemical Physics 23, no. 14 (2021): 8261–72. http://dx.doi.org/10.1039/d0cp01527j.

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We use the model system ethanol–dodecane to demonstrate that giant critical fluctuations induced by easily accessible weak centrifugal fields as low as 2000g can be observed above the miscibility gap even far from the critical point of a binary liquid mixture.

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46

Invernizzi, Costante M., Abubakr Ayub, Gioele Di Marcoberardino, and Paolo Iora. "Pure and Hydrocarbon Binary Mixtures as Possible Alternatives Working Fluids to the Usual Organic Rankine Cycles Biomass Conversion Systems." Energies 12, no. 21 (October 30, 2019): 4140. http://dx.doi.org/10.3390/en12214140.

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This study investigates the use of pure and hydrocarbons binary mixtures as potential alternatives working fluids in a usual biomass powered organic Rankine cycle (ORC). A typical biomass combined heat and power plant installed in Cremona (Italy) is considered as the benchmark. Eight pure hydrocarbons (linear and cyclic) and four binary mixtures of linear hydrocarbons were selected. The critical points of the binary mixtures at different composition were calculated using an in-house code developed in MATLAB© (R2018b) environment. Based on the critical point of a working fluid, supercritical and subcritical cycle configurations of ORC were analysed. A detailed thermodynamic comparison with benchmark cycle was carried out in view of cycle efficiency, maximum operating pressure, size of the turbine and heat exchangers. The supercritical cycles showed 0.02 to 0.03 points lower efficiency, whereas, subcritical cycles showed comparable efficiencies than that of the benchmark cycle. The cycles operating with hydrocarbons (pure and mixtures) exhibited considerably lower volume flow ratios in turbine which indicates lower turbine size. Also, size parameter of regenerator is comparatively lower due to the lower molecular complexity of the hydrocarbons. A noticeable increase in turbine power output was observed with change in composition of the iso-octane/n-octane binary mixture at the same thermodynamic efficiency.

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47

Drozd-Rzoska, Aleksandra. "Shear viscosity studies above and below the critical consolute point in a nitrobenzene-decane mixture." Physical Review E 62, no. 6 (December 1, 2000): 8071–75. http://dx.doi.org/10.1103/physreve.62.8071.

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48

Orzechowski, K., M. Kosmowska, and M. Adamczyk. "Electric Permittivity Anomaly Close to the Critical Consolute Point of a Nitrobenzene + Octane Liquid Mixture." Journal of Physical Chemistry B 116, no. 8 (February 15, 2012): 2492–97. http://dx.doi.org/10.1021/jp2098203.

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49

Dukhin, S. S., C. Zhu, R. Dave, R. Pfeffer, J. J. Luo, F. Chávez, and Y. Shen. "Dynamic interfacial tension near critical point of a solvent–antisolvent mixture and laminar jet stabilization." Colloids and Surfaces A: Physicochemical and Engineering Aspects 229, no. 1-3 (November 2003): 181–99. http://dx.doi.org/10.1016/s0927-7757(03)00326-1.

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50

Bulavin, L. A., A. V. Oleinikova, and A. V. Petrovitskij. "Influence of ions on the critical behavior of a binary mixture near the consolute point." International Journal of Thermophysics 17, no. 1 (January 1996): 137–45. http://dx.doi.org/10.1007/bf01448216.

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