Cascade Impactor Modeling and Design

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Kermanshahi Monfared, Navid | 2011

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Type of Document: M.Sc. Thesis
Language: English
Document No: 42441 (58)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Saeedi, Mohammad Saeed; Sani, Mahdi
Abstract:
Cascade impactors are the instruments which are used to assess the particle size distribution and the cut off diameter. Cascade impactors are wildly used for hygiene purposes, environmental, and toxicological studies. However, to find out the accurate size distribution, the cut off diameter of each stage which is different for different types of impactors with different geometry specifications should be determined. In this study first the basis of the cascade impactor operation is described. Next, different types of cascade impactors are introduced, and the Andersen Cascade Impactor (ACI) is chosen to design. The design criteria are explained and the dimension of each stage, entrance cone, and Induction Port (IP) are described. The main purpose of this study is to develop a reliable CFD model of ACI and simulate the flow inside the cascade impactor in order to find the cut off diameter and collection efficiency
Keywords:
Design ; Modeling ; Computational Fluid Dynamics (CFD) ; Simulation ; Andersen Cascade Impactor (ACI) ; Cut Diameter ; Collection Efficiency

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