アプリケーションギャラリ

磁場中の鉄球は, 磁場が透過性材料と相互作用する効果を示す優れた教科書的な例です. このチュートリアルシリーズは, COMSOL を用いた電磁効果の数値モデリングの入門として設計されています. このシリーズでは, 静的背景磁場と 60 Hz, 20 kHz, 13.56 MHz の3つの時間変動磁場からなる4つの異なる背景磁場レジームを解析します. これらのレジームはそれぞれ独自の挙動と前提を持ち, 異なるモデリング手法を用いています. これらのモデルはすべて, 入門モデルを出発点として, 任意の順序で完成させることができます. 詳細を見る

Permanent magnet (PM) motors are used in many high-end applications, such as in electric and hybrid vehicles. An important design limitation is that the magnets are sensitive to high temperatures, which can occur through heat losses caused by currents, particularly eddy currents. In ... 詳細を見る

This model simulates an electrodeless lamp with argon/mercury chemistry. The low excitation threshold for mercury atoms means that even though the mercury is present in small concentrations, its behavior dominates. There is strong UV emission from the plasma at 185 nm and 253 nm. The UV ... 詳細を見る

This model shows how to set up a simple Bipolar Transistor model. The output current-voltage characteristics in the common-emitter configuration are computed and the common-emitter current gain is determined. 詳細を見る

Plate reactors running under continuous conditions have emerged as candidates to replace batch reactors, primarily in fine chemicals and pharmaceuticals production. One of the advantages of the plate reactor design is that it allows for efficient temperature control of the reacting ... 詳細を見る

An electrostatically actuated MEMS resonator is simulated in the time and frequency domains. The device is driven by an AC + DC bias voltage applied across a parallel plate capacitor. The dependence of the resonant frequency on DC bias is assessed, and frequency domain and transient ... 詳細を見る

The Boltzmann equation can be solved to validate sets of electron impact collision cross sections. In fact, sets of collision cross sections are traditionally inferred by solving a two-term approximation to the Boltzmann equation and comparing the results to swarm experiments. This model ... 詳細を見る

A radome minimizes losses and improves radiation characteristics of an antenna through its design. The structure can be optimized to minimize the transmission loss and also designed to improve radiation characteristics including antenna directivity and side lobes. Shown in the model is ... 詳細を見る

An important step in brewing beer is the fermentation process. Here, alcohol is formed together with various flavor substances from sugars in the presence of yeast. The initial sugar content, temperature, and yeast type dictate how the fermentation proceeds. In this example, the ... 詳細を見る

蓄熱ユニットは, 太陽熱, 地熱, または廃熱源からの熱エネルギーを蓄積するために使用されます. 最もシンプルなユニットは, 家庭でよく見られる水タンクで構成され, 太陽エネルギーを検知可能熱として蓄えます. これらのタンクの熱容量は潜熱を蓄えることでさらに増加し, 潜熱蓄熱 (LHS) ユニットとして利用されます. 通常, LHS タンクには, 相変化物質としてパラフィンが充填された球状カプセルが内蔵されています. この例では, 充填ベッド蓄熱タンク内の流れをモデル化し, 相変化を伴う熱伝達と LHS ユニットへの充填時の局所的な熱非平衡の影響を考慮しています. 詳細を見る