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Time domain computational modeling of viscothermal acoustic propagation in catalytic converter substrates with porous walls
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10.1121/1.1974759
/content/asa/journal/jasa/118/2/10.1121/1.1974759
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1974759

Figures

Image of FIG. 1.
FIG. 1.

Basic geometry of catalytic converter assembly.

Image of FIG. 2.
FIG. 2.

Representation of substrate with porous walls.

Image of FIG. 3.
FIG. 3.

Attenuation rate for acoustic propagation in capillary: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 4.
FIG. 4.

Normalized phase speed for acoustic propagation in capillary: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 5.
FIG. 5.

Normalized impedance magnitude for acoustic propagation in capillary: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 6.
FIG. 6.

Argument of impedance magnitude for acoustic propagation in capillary: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 7.
FIG. 7.

Geometry used in substrate analysis.

Image of FIG. 8.
FIG. 8.

(Color online) Magnitude of reflection coefficient for catalyst substrate: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 9.
FIG. 9.

(Color online) Argument of reflection coefficient for catalyst substrate: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 10.
FIG. 10.

(Color online) Magnitude of transmission coefficient for catalyst substrate: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 11.
FIG. 11.

(Color online) Argument of transmission coefficient for catalyst substrate: (a) adiabatic, solid walls; (b) isothermal, solid walls; (c) isothermal, porous walls.

Image of FIG. 12.
FIG. 12.

Geometry and coordinate systems for (a) circular and (b) rectangular capillaries.

Tables

Generic image for table
TABLE I.

Analytical solutions for circular and square cross sections.

Generic image for table
TABLE II.

Substrate dimensions and characteristic parameters.

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/content/asa/journal/jasa/118/2/10.1121/1.1974759
2005-08-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Time domain computational modeling of viscothermal acoustic propagation in catalytic converter substrates with porous walls
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1974759
10.1121/1.1974759
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