Simulation of diesel particulate filters in large exhaust systems

X. Hua, D. W. Herrin, T. W. Wu, T. Elnady

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The transmission loss of silencer systems that incorporate diesel particulate filters (DPF) was predicted using numerical simulation. The model developed by Allam and Åbom, which assumes plane wave propagation, was used to describe the DPF. However, three-dimensional wave propagation was permitted in the airspace upstream and downstream to the DPF. The modeling approach was validated experimentally for a case in which the plane wave cutoff frequency was exceeded in the airspaces upstream and downstream with good agreement. The assumption of plane wave behavior in the DPF was confirmed by modeling 81-cells of a DPF using an acoustic finite element model. The finite element analysis demonstrated that plane wave propagation could be assumed in the DPF regardless of the diameter of the DPF provided that the cross-sectional dimension of a cell is much smaller than an acoustic wavelength.

Original languageEnglish
Pages (from-to)1326-1332
Number of pages7
JournalApplied Acoustics
Issue number12
StatePublished - 2013

Bibliographical note

Funding Information:
This work was supported through the US–Egypt Cooperation Scheme funded by the Science and Technology for Development Fund (STDF Grant No. 866) in Egypt and the National Science Foundation (NSF Grant No. OISE-0914532) in the USA. The authors are grateful to Caterpillar Inc. and Cummins Emissions Solutions for supplying filter and attachment pipes.


  • Boundary element method
  • Diesel particulate filter
  • Finite element method
  • Mufflers

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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