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This tutorial demonstrates how to compute the response of an ultrasonic car parking sensor transducer coupling Pressure Acoustics, Frequency Domain, Solid Mechanics, and Piezoelectric Materials. The far-field radiation pattern of the transducer is then used as a source for a Ray ... 詳細を見る

このモデルは, COMSOL Multiphysics で流体構造相互作用問題を設定する方法を示しています. 流体の流れが固体構造をどのように変形するか, また連続的に変形するジオメトリで流れを解く方法を示しています. 流体構造相互作用 (FSI) マルチフィジックスインターフェースは, 流体の流れと固体力学を組み合わせて, 流体と固体構造の相互作用を捉えます. 固体力学インターフェースと単相流インターフェースは, それぞれ固体と流体をモデル化します. FSI カップリングは, 流体と固体の境界に表示されます. 流体構造相互作用インターフェースは, ... 詳細を見る

This is a model of a simple thermoacoustic engine that includes a thermal stack to convert thermal energy to acoustic energy. The model is set up using two approaches: 1) Using a linear perturbation (acoustic) approaches solving the fluid motion with the Thermoviscous Acoustics, ... 詳細を見る

This small tutorial model studies energy conservation in a small conceptual test setup. The model has an inlet and outlet (modeled using ports) and a Helmholtz resonator with a very narrow neck. The acoustics in the narrow neck are modeled with Thermoviscous Acoustic for a detailed ... 詳細を見る

プロのワインテイスティングでは, 1回のセッションで複数のワインのサンプルが審査されます. エタノールと水の蒸発により味が変わるため, 各サンプルを覆うことが重要です. このモデルは, ワイングラスからのエタノールと水の蒸発をシミュレートします. 非理想的な液体混合物からの複数の種の蒸発は, 拡張 Raoult の法則を使用してモデル化されます. 蒸発により, 組成の変化と蒸発熱の両方により, 周囲の蒸気相に自由対流が発生します. モデルは, 層流, 濃縮種の輸送, 流体の伝熱インターフェースを連成して2D軸対称に設定されています. 正確な熱力学データは, ... 詳細を見る

This model utilizes the thermoviscous acoustic interface in a sub-model to obtain detailed results for the transfer impedance of a perforated plate (including the thermal and viscous losses). The impedance is in turn used as an internal impedance in a pressure acoustic model of a ... 詳細を見る

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 ... 詳細を見る

With an increase in the parallel component of the applied field, carriers can gain energies above the ambient thermal energy and be able to transfer energy gained by the field to the lattice by optical phonon emission. The latter effect leads to a saturation of the carriers mobility. The ... 詳細を見る

In this tutorial, the propagation of elastic waves in the ground after a seismic event is simulated using a 2D model. The effect of the ground surface topology on the wave propagation is illustrated when an ideal half space is modified with the presence of a small mountain. The model is ... 詳細を見る

This conceptual model analyzes the influence of leaks on the acoustic response of an earbud speaker placed in an ear-canal-like geometry. Built-in impedance models are used to capture the effects of a perforated plate in front of the speaker, skin impedance, and ear drum impedance. The ... 詳細を見る