Optimization of pleated filter designs using a finite-element numerical model

Da Ren Chen, David Y.H. Pui, Benjamin Y.H. Liu

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


A numerical model has been developed to optimize the design of pleated filter panels. In this model, the fluid flow is modeled by a steady laminar flow and the filter media resistance is governed by the Darcy-Lapwood-Brinkman equation. A finite element method with a nine-node Lagrangian element is used to solve the governing equations. For the rectangularly pleated filter panel, the numerical results agree well with the analytical model of Yu and Goulding (1992) and with his experimental data. The pressure drop increases at small pleat count due to increased media face velocity, and at large pleat count due to increased viscous drag in the pleat spacings. Therefore, an optimal pleat count for minimum pressure drop exists at a certain pleat height for each filter media type. The optimization of rectangular pleated filters, e.g., mini-pleated filter panels, has been performed for six commercial filter media. The optimal pleat count is shown to increase with decreasing media permeability of the filter media. A generalized correlation curve has been found for the six filter media by using a nondimensional parameter analysis. The results can be used to design pleated filter panels with minimum pressure drop.

Original languageEnglish (US)
Pages (from-to)579-590
Number of pages12
JournalAerosol Science and Technology
Issue number4
StatePublished - 1995

Bibliographical note

Funding Information:
This research is supported by a grant from the Center for Filtration Research at the University of Minnesota. Center members include 3M Company, Donaldson Company, Inc., Fleetguard, Inc., Honeywell and TSI Inc.


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