Accurate and scale-free pressure prediction for many-body dissipative particle dynamics

Abstract

We have developed a generalized mean-field equation of state suitable for many-body dissipative particle dynamics method in a homogeneous system, which is accurate and valid at arbitrary level of coarse-graining in pressure prediction. Specifically, the truncation influences caused by finite cutoff radius have been mitigated to satisfy with the assumption of mean-field theory, and the so-called local density has been replaced with global one in the frame of homogeneous system. Our present work represents an advancement toward establishing a robust and reliable one-to-one parameter mapping protocol based on mean-field theory.