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January 2009 - March 2010

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University of Minnesota Twin Cities
Institute of Technology
Department of Mechanical Engineering

PI: Peter H. McMurry, Associate Fellow
Co-PI: David R. Hanson

Numerical Analysis of Particle Transport Through Various Aerosol Instruments

Numerical simulations of the flow field and particle transport in an instrument can provide information on its performance and thus improve the interpretation of experimental results and can lead to improvements in design. This study uses FLUENT and its supporting software to calculate flow and particle motion in various aerosol instruments such as the Cluster - Chemical Ionization Mass Spectrometer (Cluster-CIMS). Freshly nucleated clusters are drawn through the inlet for this instrument, and their loss to surfaces must be known as they travel to the region where they become charged and sampled. The challenges are to design the Cluster-CIMS inlet configuration and determining how the configuration affects the gas flow rate and the corresponding cluster sampling efficiency. The flow fields and gradients in cluster concentrations are solved for a range of different conditions.

Group Members

Modi Chen, Graduate Student
Raganathan Gopalakrishnan, Graduate Student
Jingkun Jiang, Research Associate
Jacob H. Scheckman, Research Associate
Mari Titcombe, Graduate Student
Xiaoliang Wang, TSI Incorporated, Shoreview, Minnesota
Brent Williams, Research Associate