CFD study of flow and heat transfer in miniature mixers for nanocomposites

U. Sundararaj, Yun Bai, K. Nandakumar

Research output: Contribution to conferencePaperpeer-review


The Alberta Polymer Asymmetric Mixer (APAM, 2ml) and a mini-batch mixer (MBM, 3ml), which is scaled down from the commercial Haake batch mixer, were built in our lab and used for polymer blends and nanocomposites processing. Previous experimental study has shown that the APAM is effective in mixing polymer blends and nanocomposites. Here we use CFD software, Polyflow from Fluent Inc, to model the transient non-isothermal processing of polystyrene in APAM and in MBM. The flow fields inside MBM and APAM were characterized by velocity profiles, which show the co-existence of shear flow, converging flow and recirculation. The temperature inside both mixers increased due to viscous dissipation. Thermal steady state was reached after 12s and 25s respectively for MBM and APAM. The simulation results were verified by experiment for the MBM by measuring the melt temperature. Finally, the mixing performance of the miniature mixers was characterized using the spatial distribution of shear rate, and shear stress.

Original languageEnglish
Number of pages1
StatePublished - 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: 30 Oct 20054 Nov 2005


Conference05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/TerritoryUnited States
CityCincinnati, OH


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