Design of a slot nanoparticle virtual impactor

Prachi Middha, Anthony Wexler

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A novel design for a nanoparticle slot virtual impactor is proposed. Compressible flow through the slot impactor is simulated using the CFD code FLUENT, and the corresponding particle trajectories are studied. The variation of the impactor performance with design parameters is also investigated. The design is optimized for a specific application where the virtual impactor serves as a preconcentrator. However, the design proposed is suitable for any application that requires concentration of ultrafine particles at high volumes. Additionally, the design developed in this work can be used for size selection by simply varying the operating pressure of the instrument. The 50% cut-off diameter varies from 13 nm to 200 nm as the operating pressure is increased by a factor of 20, without affecting the minor to total flow ratio significantly.

Original languageEnglish (US)
Pages (from-to)737-743
Number of pages7
JournalAerosol Science and Technology
Issue number10
StatePublished - Oct 1 2006

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Mechanical Engineering


Dive into the research topics of 'Design of a slot nanoparticle virtual impactor'. Together they form a unique fingerprint.

Cite this