![]() The exhaust fumes enter through the left pipe and exit through the right pipe. Figure 1: Geometry of the lined muffler with the upper half removed. In the second version it is lined with 15 mm of absorbing glass wool. In the first version of the model the chamber is empty. Model Definition The muffler schematically depicted in Figure 1 consists of a 24-liter resonator chamber with a section of the centered exhaust pipe included at each end. See also Eigenmodes in a Muffler, which computes the propagating modes in the chamber. The main output is the transmission loss for the frequency range 50 Hz 1500 Hz. The model s purpose is to show how to analyze both inductive and resistive damping in pressure acoustics. The approach is generally applicable to analyzing the damping of propagation of harmonic pressure waves. CM020202ģ Absorptive Muffler Introduction This model describes the pressure-wave propagation in a muffler for an internal combustion engine. If you need to contact Support, an online request form is located at the COMSOL Access page at Other useful links include: Support Center: Download COMSOL: Product Updates: COMSOL Community: Events: COMSOL Video Center: Support Knowledge Base: Part No. ![]() You can also visit the Worldwide Sales Offices page at for address and contact information. For a list of such trademark owners, see Version: May 2013 COMSOL 4.3b Contact Information Visit the Contact Us page at to submit general inquiries, contact Technical Support, or search for an address and phone number. All other trademarks are the property of their respective owners, and COMSOL AB and its subsidiaries and products are not affiliated with, endorsed by, sponsored by, or supported by those trademark owners. ![]() COMSOL, COMSOL Multiphysics, Capture the Concept, COMSOL Desktop, and LiveLink are either registered trademarks or trademarks of COMSOL AB. This Documentation and the Programs described herein are furnished under the COMSOL Software License Agreement ( and may be used or copied only under the terms of the license agreement. ![]() 1 Acoustics Module Model Library Manual VERSION 4.3bĢ Acoustics Module Model Library Manual COMSOL Protected by U.S. ![]()
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