Pattern dynamics of density and velocity fields in segregation of fluid mixtures

Prasenjit Das; Awadhesh Kumar Dubey; Sanjay Puri

doi:10.1063/5.0203489

Pattern dynamics of density and velocity fields in segregation of fluid mixtures

J Chem Phys. 2024 Apr 21;160(15):154507. doi: 10.1063/5.0203489.

Authors

Prasenjit Das¹, Awadhesh Kumar Dubey², Sanjay Puri³

Affiliations

¹ Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, S.A.S. Nagar, 140306 Punjab, India.
² Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur 495009, Chhattisgarh, India.
³ School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India.

PMID: 38634496
DOI: 10.1063/5.0203489

Abstract

We present comprehensive numerical results from a study of model H, which describes phase separation kinetics in binary fluid mixtures. We study the pattern dynamics of both density and velocity fields in d = 2, 3. The density length scales show three distinct regimes, in accordance with analytical arguments. The velocity length scale shows a diffusive behavior. We also study the scaling behavior of the morphologies for density and velocity fields and observe dynamical scaling in the relevant correlation functions and structure factors. Finally, we study the effect of quenched random field disorder on spinodal decomposition in model H.