Polymer chain simulations in microchannels with Dissipative Particle Dynamics

In this work we employ Dissipative Particle Dynamics (\textsc{dpd}) for simulations of dilute polymer solutions using bead-spring representations. We present comparison of two time-marching schemes: the popular velocity-Verlet and Lowe's scheme. Schmidt number effects are investigated for a series of cases, including $\lambda$-\textsc{dna} molecules under shear (using the Marko-Siggia wormlike chain spring law) and Poiseuille flow in microchannels. Effects on the polymer depletion layer, power-law profiles and apparent viscosities are presented as a function of the number of beads per polymer chain.