000842363 001__ 842363 000842363 005__ 20240619083544.0 000842363 0247_ $$2doi$$a10.1063/1.5006627 000842363 0247_ $$2ISSN$$a0021-9606 000842363 0247_ $$2ISSN$$a1089-7690 000842363 0247_ $$2Handle$$a2128/18289 000842363 0247_ $$2WOS$$aWOS:000423029200025 000842363 037__ $$aFZJ-2018-00604 000842363 041__ $$aEnglish 000842363 082__ $$a540 000842363 1001_ $$00000-0003-4636-825X$$aAhuja, V. R.$$b0$$eCorresponding author 000842363 245__ $$aHydrodynamically Coupled Brownian Dynamics: A coarse-grain particle-based Brownian dynamics technique with hydrodynamic interactions for modeling self-developing flow of polymer solutions 000842363 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2018 000842363 3367_ $$2DRIVER$$aarticle 000842363 3367_ $$2DataCite$$aOutput Types/Journal article 000842363 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1524724152_8482 000842363 3367_ $$2BibTeX$$aARTICLE 000842363 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000842363 3367_ $$00$$2EndNote$$aJournal Article 000842363 520__ $$aWe present a novel coarse-grain particle-based simulation technique for modeling self-developing flow of dilute and semi-dilute polymer solutions. The central idea in this paper is the two-way coupling between a mesoscopic polymer model and a phenomenological fluid model. As our polymer model, we choose Responsive Particle Dynamics (RaPiD), a Brownian dynamics method, which formulates the so-called “conservative” and “transient” pair-potentials through which the polymers interact besides experiencing random forces in accordance with the fluctuation dissipation theorem. In addition to these interactions, our polymer blobs are also influenced by the background solvent velocity field, which we calculate by solving the Navier-Stokes equation discretized on a moving grid of fluid blobs using the Smoothed Particle Hydrodynamics (SPH) technique. While the polymers experience this frictional force opposing their motion relative to the background flow field, our fluid blobs also in turn are influenced by the motion of the polymers through an interaction term. This makes our technique a two-way coupling algorithm. We have constructed this interaction term in such a way that momentum is conserved locally, thereby preserving long range hydrodynamics. Furthermore, we have derived pairwise fluctuation terms for the velocities of the fluid blobs using the Fokker-Planck equation, which have been alternatively derived using the General Equation for the Non-Equilibrium Reversible-Irreversible Coupling (GENERIC) approach in Smoothed Dissipative Particle Dynamics (SDPD) literature. These velocity fluctuations for the fluid may be incorporated into the velocity updates for our fluid blobs to obtain a thermodynamically consistent distribution of velocities. In cases where these fluctuations are insignificant, however, these additional terms may well be dropped out as they are in a standard SPH simulation. We have applied our technique to study the rheology of two different concentrations of our model linear polymer solutions. The results show that the polymers and the fluid are coupled very well with each other, showing no lag between their velocities. Furthermore, our results show non-Newtonian shear thinning and the characteristic flattening of the Poiseuille flow profile typically observed for polymer solutions. 000842363 536__ $$0G:(DE-HGF)POF3-551$$a551 - Functional Macromolecules and Complexes (POF3-551)$$cPOF3-551$$fPOF III$$x0 000842363 588__ $$aDataset connected to CrossRef 000842363 7001_ $$0P:(DE-HGF)0$$avan der Gucht, J.$$b1 000842363 7001_ $$0P:(DE-Juel1)159317$$aBriels, Willem$$b2$$eCorresponding author$$ufzj 000842363 773__ $$0PERI:(DE-600)1473050-9$$a10.1063/1.5006627$$gVol. 148, no. 3, p. 034902 -$$n3$$p034902 -$$tThe journal of chemical physics$$v148$$x1089-7690$$y2018 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.pdf$$yPublished on 2018-01-16. Available in OpenAccess from 2019-01-16. 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.gif?subformat=icon$$xicon$$yPublished on 2018-01-16. Available in OpenAccess from 2019-01-16. 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.jpg?subformat=icon-1440$$xicon-1440$$yPublished on 2018-01-16. Available in OpenAccess from 2019-01-16. 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.jpg?subformat=icon-180$$xicon-180$$yPublished on 2018-01-16. Available in OpenAccess from 2019-01-16. 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.jpg?subformat=icon-640$$xicon-640$$yPublished on 2018-01-16. Available in OpenAccess from 2019-01-16. 000842363 8564_ $$uhttps://juser.fz-juelich.de/record/842363/files/1.5006627.pdf?subformat=pdfa$$xpdfa$$yPublished on 2018-01-16. 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