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This example studies heat transfer in a composite two-dimensional structure. Four materials with distinct thermal conductivities k compose the structure. The top and bottom boundaries are facing environments respectively at 0°C and 20°C. The temperature distribution and the heat flux ... 詳細を見る

This application presents an example of pressure driven flow and electrophoresis in a 3D micro channel system. Researchers often use a device similar to the one in this model as an electrokinetic sample injector in biochips to obtain well-defined sample volumes of dissociated acids and ... 詳細を見る

This is a model of the Brüel and Kjær 4134 condenser microphone. The geometry and material parameters are those of the actual microphone. The modeled sensitivity level is compared to measurements performed on an actual microphone and shows good agreement. The membrane deformation, ... 詳細を見る

Electrochemical supercapacitors feature relatively higher energy densities than conventional capacitors. With several advantages, such as fast charging, long charge–discharge cycles, and broad operating temperature ranges, electrochemical supercapacitors have found wide applications in ... 詳細を見る

流体ダンパーは, 軍事機器における衝撃吸収, 土木構造物における地震や風による振動の抑制など, 様々な用途に使用されています. 流体ダンパーは, 機械エネルギーを熱に変換することで機能します. このモデルは, 流体ダンパーにおける粘性加熱とそれに伴う温度上昇の現象を示します. 粘性加熱はマイクロ流体デバイスにおいても重要です. マイクロ流体デバイスでは, 断面積が小さく長さが長いため, 大きな発熱が発生し, 結果として流体の流れに影響を与える可能性があります. このモデルでは, 共役熱伝達, 層流, 移動メッシュの各インターフェースを用いて時間依存スタディを実施します. 詳細を見る

Scientists use the SAR (specific absorption rate) to determine the amount of radiation that human tissue absorbs. This measurement is especially important for mobile telephones, which radiate close to the brain. The model studies how a human head absorbs a radiated wave from an antenna ... 詳細を見る

Density variations can initiate flow even in a still fluid. In earth systems, density variations can arise from naturally occurring salts, subsurface temperature changes, or migrating pollution. This buoyant or density-driven flow factors into fluid movement in salt-lake systems, saline ... 詳細を見る

The heat distribution in a hollow pipe, whose ends are held at two different temperatures, is studied. The outside surface is assumed to be thermally isolated and the inner surfaces have radiation boundary conditions. The role of convection in the heat transfer is taken to be ... 詳細を見る

Multipaction can occur when electrons are accelerated by a high frequency RF field into surfaces. At certain frequencies, the number of electrons in a cavity can grow exponentially. This exponential growth cannot continue indefinitely because space charge effects in the cavity can ... 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