Odessa, Ukraine
Odessa, Ukraine

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Nikitin D.,Academy of Refrigeration | Mazur V.,Academy of Refrigeration
International Journal of Thermal Sciences | Year: 2012

The effect of nanoparticles on the critical point shift for classical fluids embedded with nanostructured materials is examined. The low Global Warming Potential (GWP) industrial fluids + carbon nanotubes (CNT) systems are studied to estimate the critical point shift in the nanofluids with reference to pure components. Global phase behavior of two-component fluids with nanoparticles are analyzed and transformation from zeotropic to azeotropic state in the system R744/41 under the CNT doping is discussed.© 2011 Elsevier Masson SAS. All rights reserved.


Artemenko S.,Academy of Refrigeration | Lozovsky T.,Academy of Refrigeration | Mazur V.,Academy of Refrigeration
NATO Science for Peace and Security Series A: Chemistry and Biology | Year: 2010

The principal aim of this work is a comprehensive analysis of the fluid phase behavior of binary fluid mixtures via the van der Waals like equation of state (EoS) which has a multiplicity of critical points in metastable region. We test the modified van der Waals equation of state (MVDW) proposed by Skibinski et al. (2004) which displays a complex phase behavior including three critical points and identifies four fluid phases (gas, low density liquid (LDL), high density liquid (HDL), and very high density liquid (VHDL)). An improvement of repulsive part doesn't change a topological picture of phase behavior in the wide range of thermodynamic variables. The van der Waals attractive interaction and excluded volume for mixture are calculated from classical mixing rules. Critical lines in binary mixtures of type III of phase behavior in which the components exhibit polyamorphism are calculated and a continuity of fluid-fluid critical line at high pressure is observed.

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