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COMSOL Conference 2024 論文集を見る
随着城市用电量的逐年增加，单相变压器连续运行时的损耗发热严重制约了其发展和应用。高温发热会加速绝缘老化和缩短设备使用寿命，甚至导致一系列故障问题，降低设备的可靠性。该问题涉及电-磁-热多物理场耦合，心损耗温升的准确计算至关重要，为此本文基于硅钢片磁化特性的测量数据，考虑铁心磁特性受应力影响，采用 COMSOL Multiphysics 多物理场仿真软件，通过 AC/DC 模块、固体力学模块和传热模块对单相变压器铁心的磁场、应力、损耗和温升分布进行研究。首先施加激励得到铁心磁场及损耗密度分布，最后将损耗值作为温度场的热源，进而计算铁心的温升分布 ... 詳細を見る
The detection of early corrosion is a key issue to mitigate the damage induced by metal corrosion. The optical fiber corrosion sensor based on a side-polished polarizer is realized recently. The polarizer is fabricated by sputtering a Fe film on a side-polished single mode fiber. The new ... 詳細を見る
This paper presents the modeling of interaction between terahertz radiation and human skin. By doing so, we can differentiate between the healthy skin and the cancerous skin (BCC). We set a square region as the cancerous skin, surrounded by the healthy skin. Since the biological tissues ... 詳細を見る
Neuromodulation is the use of electromagnetic fields to modulate the human nervous system, typically to treat neurological disorders. Electroceuticals is an ambitious program to modulate any nerve, anywhere, anytime, for any reason — to treat disease, disorders, and enhance or interface ... 詳細を見る
A Microbolometer is a specific type of uncooled infrared radiation detector used in thermal cameras, which converts the incoming energy into a proportionate electrical signal, which is then amplified, processed and displayed, typically on the thermal camera’s LCD viewer. The main ... 詳細を見る
This paper presents a measurement type 4000/5A current transformer which has 4 primary bars. The magnetic circuit of the prototype can be separable presenting easy installation inside the distribution panel. Time domain and frequency based simulations are obtained and the electric ... 詳細を見る
Introduction The monitoring of bacteria concentration in drain fluid is the most common way to estimate the success of a colon surgery. However, the lack of efficient method to follow the development of E.coli in drain fluid after surgery is often fatal to the patient. The proposed ... 詳細を見る
The filling process of thermoformed cups with food like yogurt is followed by placing a laminated aluminum foil for hermetic sealing on top of the cup. By today’s standards the sealing of the thermoformed aluminum foil with the cup is primarily realized by contact heat with a hot stamp. ... 詳細を見る
Nondestructive Testing (NDT) refers to a wide group of methods used in industry to evaluate the properties of a material, component or system without causing damage. These include radiography, ultrasound, electromagnetic and visual, among others. Eddy-current testing (ECT) is one such ... 詳細を見る
To increase the power transfer capacity of existing lines, a transmission system operator in Germany plans to replace an existing 380-kV three-phase AC system into a bipolar HVDC system on the same tower that is called a 'hybrid line'. Due to the proximity of AC transmission systems and ... 詳細を見る