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Published on: September 4, 2015
Particle-based mesoscopic model for phase separation in a binary fluid mixture
Surabhi Jaiswal1, Soudamini Sahoo2, Snigdha Thakur1
1Department of Physics, Indian Institute of Science Education and Research Bhopal, Madhya Pradesh 462066, India.
Abstract:
A mesoscopic simulation model to study the phase separation in a binary fluid mixture in three dimensions (3D) is presented here by augmenting the existing particle-based multiparticle collision dynamics (MPCD) algorithm. The approach describes the nonideal equation of the fluid state by incorporating the excluded-volume interaction between the two components within the framework of stochastic collision, which depends on the local fluid composition and velocity. Calculating the nonideal contribution to the pressure both from simulation and analytics shows the model to be thermodynamically consistent. A phase diagram to explore the range of parameters that give rise to phase separation in the model is investigated. The interfacial width and phase growth obtained from the model agree with the literature for a wide range of temperatures and parameters.
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