Generalized energy-conserving dissipative particle dynamics with mass transfer: coupling between energy and mass exchange

Identifier:  imarina:9369670

Handle: https://hdl.handle.net/20.500.11797/imarina9369670

Authors:  Colella, Giuseppe; Mackie, Allan D; Larentzos, James P; Brennan, John K; Lisal, Martin; Bonet Avalos, Josep

Abstract:
The complete description of energy and material transport within the Generalized energy-conserving dissipative particle dynamics with mass transfer (GenDPDE-M) methodology is presented. In particular, the dynamic coupling between mass and energy is incorporated into the GenDPDE-M, which was previously introduced with dynamically decoupled fluxes (J. Bonet Avalos et al., J. Chem. Theory Comput., 18 (12): 7639-7652, 2022). From a theoretical perspective, we have derived the appropriate Fluctuation-Dissipation theorems along with Onsager's reciprocal relations, suitable for mesoscale models featuring this coupling. Equilibrium and non-equilibrium simulations are performed to demonstrate the internal thermodynamic consistency of the method, as well as the ability to capture the Ludwig-Soret effect, and tune its strength through the mesoscopic parameters. In view of the completeness of the presented approach, GenDPDE-M is the most general Lagrangian method to deal with complex fluids and systems at the mesoscale, where thermal agitation is relevant.