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This example treats the modeling of electroosmotic flow in porous media. The system consists of a compartment of sintered porous material and two electrodes that generate an electric field. The cell combines pressure and electroosmotic driven flow. The equations that are solved are the ... 詳細を見る

Quantum dots are nano- or microscale devices created by confining free electrons in a 3D semiconducting matrix. Those tiny islands or droplets of confined “free electrons” (those with no potential energy) present many interesting electronic properties. They are of potential importance ... 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

Maximizing product yield is a main task in chemical reaction engineering. This can be especially challenging if the desired product, once formed, can be consumed by further reactions. This example investigates such a series reaction as it occurs in a tubular reactor. You will start by ... 詳細を見る

多孔質構造における輸送は, 通常, 有効輸送特性を持つ簡略化された均質モデルを用いて扱われます. これは, 多孔質構造を構成する細孔や粒子の典型的な寸法が, モデル化対象となる領域のサイズよりも数桁小さいため, ほとんどの場合に必要不可欠です. このモデルは, 詳細モデルで記述された人工多孔質構造における輸送と, 有効輸送特性を用いた簡略化された均質多孔質媒体アプローチを比較することにより, 多孔質媒体における有効拡散率の概念を導入します. このモデルは2つの部分で構成されています. 最初の部分では, 詳細な形状を持つモデルを作成します. 2番目の部分では, ... 詳細を見る

One of the most common reactors in the chemical industry, for use in heterogeneous catalytic processes, is the packed bed reactor. This type of reactor is used both in synthesis as well as in effluent treatment and catalytic combustion. The reactor consists in essence of a container ... 詳細を見る

This model simulates an H-shaped micro-cell designed for diffusion-controlled separation. The cell puts two different laminar streams in contact for a controlled period of time. The contact surface is well-defined and, by controlling the flow rate, it is possible to control the amount of ... 詳細を見る

This model simulates a static analysis of heat conduction in a thin conductive shell. This is a benchmark model where the result is compared with a NAFEMS benchmark solution. 詳細を見る

As oil flows through a pipeline section heat is released due to the work of internal friction forces in the fluid. With good insulation of the pipeline, this generated heat can be used to avoid preheating of the oil, despite the fact that it is to be transported in a cold environment ... 詳細を見る

This model demonstrates the use of moving meshes in the application of copper electrodeposition on circuit boards. In these environments, the presence of cavities or 'trenches' are apparent. The model makes use of the Tertiary, Nernst-Planck interface for electrodeposition to keep track ... 詳細を見る