Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling

Details Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling

2009-02-02

arxiv.org/abs/0902.0192v1

EPL 86, 18002 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1209/0295-5075/86/18002

The behavior of a supercooled polymer melt composed of short chains with ten beads near an oscillating plate are simulated by using a hybrid simulation of molecular dynamics (MD) and computational fluid dynamics (CFD). In the method, the macroscopic dynamics are solved by using CFD, but, instead of using any constitutive equations, a local stress is calculated by using a non-equilibrium MD simulation associated at each lattice node in the CFD calculation. It is seen that the local rheology of the melt varies considerably in a thin viscous diffusion layer that arises near an oscillating plate. It is also found that the local rheology of the melt is divided into the three different regimes, i.e., the viscous fluid, viscoelastic liquid, and viscoelastic solid regimes, according to the local Deborah number $De$, which is defined with the Rouse or $\alpha$ relaxation time, $\tau_R$ or $\tau_\alpha$, and the angular frequency of the plate $\omega$ as $De^R$=$\omega\tau_R$ or $De^\alpha$=$\omega\tau_\alpha$. The melt behaves as a viscous fluid when $De^R\lesssim 1$, and the crossover between the liquid-like and solid-like regime takes place around $De^\alpha\simeq 1$.

Affiliated with

Also associated with

No associations

Rating

Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rheology of a supercooled polymer melt near an oscillating plate: an application of multiscale modeling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-159125