Modell Galerie

Die Modell Galerie umfasst COMSOL Multiphysics Modelldateien aus einer Vielzahl von Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Sie können fertige Modelle herunterladen sowie Schritt-für-Schritt-Anleitungen, mit denen Sie die Modelle nachbauen können, und verwenden Sie die Modelle als Ausgangspunkt für Ihre eigenen Anwendungen. Nutzen Sie die Quick Search, um die für Ihren Fachbereich relevanten Modelle zu finden. Um die Dateien herunterzuladen, loggen Sie sich ein oder erzeugen Sie einen COMSOL Access Account, der mit einer gültigen COMSOL Lizenz assoziiert ist.

Test Bench Car Interior - new

Sound is generated by a point source located in the wall of this test bench car interior. The sound pressure level response at a point of measurement is investigated for a range of frequencies and four different mesh resolutions. The model is first solved with the default direct solvers. Finally, it is shown how to set up an iterative solver which is efficient for large problems and the finest ...

Loudspeaker Driver - new

This is a model of a loudspeaker of the dynamic cone driver type, common for low and medium frequencies. The model analysis includes the total electric impedance and the on-axis sound pressure level at a nominal driving voltage, as functions of the frequency. The model starts out with the Small-Signal analysis from the AC/DC Module to compute the driving force and the blocked voice coil ...

Loudspeaker Driver in a Vented Enclosure - new

This example models the acoustic behavior of a woofer mounted in a bass reflex enclosure and placed in the corner of a room. One of the most important design parameters for a loudspeaker driver is its sensitivity as a function of the frequency. To isolate the driver’s performance from that of the environment it usually operates in, the driver is often set in an infinite baffle. This model, ...

Generic 711 Coupler: An Occluded Ear-Canal Simulator - new

This is the model of an occluded ear canal simulator (a generic 711 coupler). Besides certain details the geometry corresponds to the Brüel & Kjær Ear Simulator Type 4157. The real life couplers are used for simulating the acoustics of a standardized human ear canal and can be used for measurements on all sorts of devices. They are widely used in the hearing aid industry but also as ear ...

Sonic Well Logging - new

This model demonstrates how to simulate a piezoelectric transducer as both a sound transmitter and a receiver in a well logging setup. Other applications of this setup are, for example, in the field of nondestructive testing. A transmitting transducer is connected to an electrical circuit which is set up to send out a pulse as a detecting signal and also pick up the signals that come back to the ...

Hollow Cylinder - new

Fluid acoustics coupled to structural objects, such as membranes or plates, represents an important application area in many engineering fields. Some examples are: • Loudspeakers • Acoustic sensors • Nondestructive impedance testing • Medical ultrasound diagnostics This model provides a general demonstration of an acoustic fluid phenomenon in 3D coupled to a solid object. In ...

Flow Duct - new

The modeling of aircraft-engine noise is a central problem in the field of computational aeroacoustics. The acoustic field in a model of an axially symmetric aero-engine duct, generated by a noise source at the boundary, is computed and visualized. Results are presented for situations with as well as without a compressible irrotational background flow and for the cases of hard and lined duct ...

Nonlinear Acoustics: Modeling of 1D Westervelt Equation - new

This model example shows how to model nonlinear propagation of 1D finite-amplitude Acoustic waves in fluids using Acoustics Module of COMSOL Multiphysics. The model is based on the 2nd order Westervelt equation. The one dimensional nonlinear wave equation is solved in the time domain by adding the nonlinear term to the linear equation. The model does not include energy dissipation in order ...

Porous Absorber - new

This is a model of acoustic absorption by a porous acoustic open cell foam. In porous materials the sound propagates in a network of small interconnected pores. Because the dimensions of the pores are small, losses occur due to thermal conduction and viscous friction. Acoustic foams are used to sound proof rooms and ducts as well as to treat reverberation problems in rooms. The aim of the ...

Probe Tube Microphone, Transient Model - new

It is often not possible to insert a normal microphone directly into the sound field being measured. The microphone may be too big to fit inside the measured system, such as for in-the-ear measurements for hearing aid fitting. The size of the microphone may also be too large compared to the wavelength, so that it disturbs the acoustic field. In these cases, a probe tube may be attached to the ...

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