Brownian dynamics simulations in hydrogels using an adaptive time-stepping algorithm

Mats Kvarnström, Aron Westergård, Niklas Lorén, Magnus Nydén

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The adaptive time-stepping algorithm for Brownian simulation of solute diffusion in three-dimensional complex geometries previously developed by the authors of this paper was applied to heterogeneous three-dimensional polymer hydrogel structures. The simulations were performed on reconstructed three-dimensional hydrogels. The obstruction effect from the gel strands on water and diffusion of dendrimers with different sizes were determined by simulations and compared with experimental nuclear magnetic resonance diffusometry data obtained from the same material. It was concluded that obstruction alone cannot explain the observed diffusion rates, but an interaction between the dendrimers and the gel strands should be included in the simulations. The effect of a sticky-wall interaction potential with geometrically distributed residence times on the diffusion rate has been studied. It was found that sticky-wall interaction is a possible explanation for the discrepancy between simulated and experimental diffusion data for dendrimers of different sizes diffusing in hydrogels.

Original languageEnglish
Article number016102
Pages (from-to)1-6
Number of pages6
JournalPhysical Review E
Issue number1
Publication statusPublished - Jan 2009
Externally publishedYes


Dive into the research topics of 'Brownian dynamics simulations in hydrogels using an adaptive time-stepping algorithm'. Together they form a unique fingerprint.

Cite this