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This example model consists of a two-hot-arm thermal actuator made of polysilicon. The actuator is activated through thermal expansion. The temperature increase required to deform the two hot arms, and thus displace the actuator, is obtained through Joule heating (resistive heating). The ... 詳細を見る

このモデルは, COMSOL Multiphysics を使用して, 異なる次元で定義された現象を完全に連成した方法でモデル化する方法を示しています. ほとんどの場合, 反応速度式は反応物と生成物の濃度の関数として定義されますが, 吸着反応では活性部位または表面複合体の表面濃度もモデル化する必要があります. これは, リアクターのバルク内の質量バランスを, デバイスの表面のみに存在する種の質量バランスと結合する必要があることを意味します. このデバイスは, 触媒, バイオチップ, 半導体部品, または表面固有の化学種を含む任意のプロセスである可能性があります. ... 詳細を見る

This model illustrates the working principle of an axial homopolar induction bearing. An electrically conducting rotor rotating in a magnetic field produced by a permanent magnets induces eddy currents on the conducting rotor. The eddy currents, in turn, produce a magnetic field that ... 詳細を見る

This tutorial model shows how to import a 3D scanned geometry of a human head and torso and compute the head related transfer function (HRTF). The scan is imported as a .stl file and converted into a COMSOL geometry. The HRTF is computed using the reciprocity principle, locating the ... 詳細を見る

This model demonstrates how to simulate a metasurface beam deflector that uses anomalous refraction. The structure itself is a repeated array of six posts (so-called meta elements). The periodicity of the individual posts is 500 nm, so the full structure of six posts is 3 um wide. The ... 詳細を見る

Fluids that move through pore spaces in an aquifer or reservoir can shield the porous medium from stress because they bear part of the load from, for instance, overlying rocks, sediments, fluids, and buildings. Withdrawing fluids from the pore space increases the stress the solids bear, ... 詳細を見る

A spherical water-rich load (potato) is placed on the rotating glass tray of a microwave oven some distance from the center of rotation. 1 kW of 2.45 GHz microwave power is applied via a waveguide feed. The plate rotates at 9 degrees per second. The heat transfer model involves the ... 詳細を見る

この2ホットアーム熱アクチュエーターのチュートリアルモデルは, 電流伝導, 発熱を伴う熱伝導, そして熱膨張による構造応力とひずみという3つの異なる物理現象を連成します. このモデルには3つのバージョンがあります. マイクロアクチュエーターのジュール熱(thermal_actuator_jh.mph)：このモデルバージョンでは, 電流と温度のみが計算され, 変形は無視されます. COMSOL Multiphysicsライセンスのみが必要です. 熱アクチュエーター (thermal_actuator_tem.mph) ... 詳細を見る

Nowadays, there is a trend to manufacture wheel rim made up of a composite material instead of aluminum. The primary reason is to have lower values of unsprung mass which leads to faster response time and thus better acceleration, braking and cornering performances. Typically a carbon ... 詳細を見る

Just like optical lenses focus light, electric and magnetic lenses can be used for focusing beams of charged particles. This COMSOL Multiphysics model shows the path of B5+ ions passing through a focusing system of three magnetic quadrupoles. Each of the quadropoles focus the beam of ... 詳細を見る