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Browsing Research Articles (Subir Kumar Das) by Issue Date

Now showing items 1-12 of 12

Phase separation of fluids in porous media: A molecular dynamics study

Ahmad, Shaista; Puri, Sanjay; Das, Subir Kumar (American Physical Society, 2014)

We present comprehensive molecular dynamics results for phase-separation kinetics of fluids in a porous medium. This system is modeled by a symmetric Lennard-Jones fluid mixture with a quenched random field. The presence ...
Aging in ferromagnetic ordering: full decay and finite-size scaling of autocorrelation

Midya, Jiarul; Majumder, Suman; Das, Subir Kumar (IoP Publishing Ltd, 2014)

Nonequilibrium dynamics in Ising and Ginzburg-Landau models were studied for a nonconserved order parameter that mimics ordering in ferromagnets. The focus was on the understanding of the decay of the two time (t, tw; t > ...
Dynamics of clustering in freely cooling granular fluid

Paul, Subhajit; Das, Subir Kumar (Epl Association, European Physical Society, 2014)

Via the event-driven molecular-dynamics simulations, we have studied the structure and dynamics in a model granular fluid of hard discs in space dimension d = 2. Inelastic collisions among these discs lead to clustering, ...
Finite-size scaling study of shear viscosity anomaly at liquid-liquid criticality

Roy, Sutapa; Das, Subir Kumar (American Institute of Physics, 2014)

We study the equilibrium dynamics of a symmetrical binary Lennard-Jones fluid mixture near its consolute criticality. Molecular dynamics simulation results for the shear viscosity,., from a micro-canonical ensemble are ...
Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory

Das, Subir Kumar; Egorov, Sergei A.; Trefz, Benjamin; Virnau, Peter; Binder, Kurt (American Physical Society, 2014)

We study the structure and phase behavior of a binary mixture where one of the components is self-propelling in nature. The interparticle interactions in the system are taken from the Asakura-Oosawa model for colloid-polymer ...
Study of critical dynamics in fluids via molecular dynamics in canonical ensemble

Roy, Sutapa; Das, Subir K. (Springer, 2015)

With the objective of understanding the usefulness of thermostats in the study of dynamic critical phenomena in fluids, we present results for transport properties in a binary Lennard-Jones fluid that exhibits liquid-liquid ...
Atomistic simulations of liquid-liquid coexistence in confinement: comparison of thermodynamics and kinetics with bulk

Das, Subir K. (Taylor & Francis Ltd, 2015)

We review a few simulation methods and results related to the structure and non-equilibrium dynamics in the coexistence region of immiscible symmetric binary fluids, in bulk as well as under confinement, with special ...
Dimensionality dependence of aging in kinetics of diffusive phase separation: Behavior of order-parameter autocorrelation

Midya, Jiarul; Majumder, Suman; Das, Subir K. (American Physical Society, 2015)

Behavior of two-time autocorrelation during the phase separation in solid binary mixtures is studied via numerical solutions of the Cahn-Hilliard equation as well as Monte Carlo simulations of the Ising model. Results are ...
Coarsening in fluid phase transitions

Das, Subir K.; Roy, Sutapa; Midya, Jiarul (Elsevier France-Editions Scientifiques Medicales Elsevier, 2015)

We review the understanding of the kinetics of fluid phase separation in various space dimensions. Morphological differences, percolating or disconnected domains, based on overall composition in a binary liquid or on density ...
Role of initial correlation in coarsening of a ferromagnet

Chakraborty, Saikat; Das, Subir K. (Springer, 2015)

We study the dynamics of ordering in ferromagnets via Monte Carlo simulations of the Ising model, employing the Glauber spin-flip mechanism, in space dimensions d = 2 and 3, on square and simple cubic lattices. Results for ...
Activity mediated phase separation: Can we understand phase behavior of the nonequilibrium problem from an equilibrium approach?

Trefz, Benjamin; Das, Subir Kumar; Egorov, Sergei A.; Virnau, Peter; Binder, Kurt (American Institute Physics, 2016)

We present results for structure and dynamics of mixtures of active and passive particles, from molecular dynamics (MD) simulations and integral equation theory (IET) calculations, for a physically motivated model. The ...
Fractality in persistence decay and domain growth during ferromagnetic ordering: Dependence upon initial correlation

Chakraborty, Saikat; Das, Subir Kumar (American Physical Society, 2016)

The dynamics of ordering in the Ising model, following quench to zero temperature, has been studied via Glauber spin-flip Monte Carlo simulations in space dimensions d = 2 and 3. One of the primary objectives has been to ...

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