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Updated: Jun 5, 2026

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
Published on: September 17, 2021
Adaptive multiscale molecular dynamics of macromolecular fluids
Steven O Nielsen1, Preston B Moore, Bernd Ensing
1Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, USA.
Abstract:
Until now, adaptive atomistic-coarse-grain (A/CG) molecular dynamics simulations have had very limited applicability because the on-the-fly CG → A transformation is problematic for all but those molecules whose CG representation consists of a single particle. Here, we solve this problem by combining a transitional healing region with a rotational dynamics of rigid atomistic fragments in the CG region. Error control is obtained by analysis of the A ↔ CG energy flow. We illustrate the method with adaptive multiscale simulations of liquid hexane and of a dilute polymer solution in a theta solvent.
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