相关实验视频
Updated: Jul 21, 2025

08:23
Finite Element Modelling of a Cellular Electric Microenvironment
Published on: May 18, 2021
3.5K
静电移动波系统的电场和介电泳力数值解决方案
Yue Yu1,2, Yao Luo3, Jan Cilliers1,2
1Resource Geophysics Academy, Imperial College London, London SW7 2BP, UK.
Micromachines
|July 29, 2023
概括
静电移动波 (ETW) 方法是粒子操纵的关键. 这项研究验证了诸如电荷模拟 (CSM) 和边界元素 (BEM) 等数值方法,用于准确建模ETW场,这对于设备设计至关重要.
科学领域:
- 物理 物理学 物理
- 工程 工程师 工程师 工程师
- 材料科学 材料科学 材料科学
背景情况:
- 静电移动波 (ETW) 方法对于诸如太阳能电池板粉尘减轻,空间资源利用和生物细胞操纵等应用至关重要.
- 精确分析粒子力和ETW设计参数需要精确了解ETW场分布.
研究的目的:
- 通过数值来确定平行电极阵列产生的静电移动波 (ETW) 场分布.
- 为了比较电荷模拟方法 (CSM) 和边界元素方法 (BEM) 的准确性和效率,用于ETW场计算.
- 通过有限元法 (FEM) 验证数值结果,并分析电场和介电泳 (DEP) 组件.
主要方法:
- 实施充电模拟方法 (CSM) 以优化的轮点和虚拟充电来实现低累积误差.
- 应用边界元素方法 (BEM) 来规避CSM固有的充电位置限制.
- 使用图像方法来简化CSM和BEM实现.
- 沿边界元素推导绿色函数积分的分析公式.
- 使用有限元法 (FEM) 进行结果的交叉验证.
主要成果:
- 从CSM和BEM获得的数值结果之间观察到异常一致.
- 与FEM相比,在电极阵列的极端发现了差异.
- 进行了对电场和电离子电离子 (DEP) 组件的详细分析,特别关注靠近电极表面的区域.
结论:
- CSM和BEM是计算ETW场分布的可靠和准确的数值方法.
- 这些发现为在各种应用中设计和制造有效的ETW系统提供了必要的数据.
- 了解电极附近的电场分布对于优化粒子操纵至关重要.
相关概念视频
Electromagnetic Wave Equation
1.2K
Maxwell's equations for electromagnetic fields are related to source charges, either static or moving. These fields act on a test charge, whose trajectory can thus be determined using suitable boundary conditions. The objective of electromagnetism is thus theoretically complete.
However, although electric and magnetic fields were first introduced as mathematical constructs to simplify the description of mutual forces between charges, a natural question emerges from Maxwell's equations:...
However, although electric and magnetic fields were first introduced as mathematical constructs to simplify the description of mutual forces between charges, a natural question emerges from Maxwell's equations:...
1.2K
Plane Electromagnetic Waves II
3.1K
Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
3.1K
Plane Electromagnetic Waves I
3.7K
The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed...
The EM field is assumed...
3.7K
Calculations of Electric Potential II
1.7K
An electric dipole is a system of two equal but opposite charges, separated by a fixed distance. This system is used to model many real-world systems, including atomic and molecular interactions. One of these systems is the water molecule, but only under certain circumstances. These circumstances are met inside a microwave oven, where electric fields with alternating directions make the water molecules change orientation. This vibration is equivalent to heat at the molecular level.
Consider a...
Consider a...
1.7K
Electric Field of Two Equal and Opposite Charges
5.9K
Atoms generally contain the same number of positively and negatively charged particles, protons, and electrons. Hence, they are electrically neutral. However, the centers of the positive and negative charges do not always coincide. In such a scenario, the electric field of an atom may not be zero.
A separation of the positive and negative charges can lead to a weak, remnant effect of the positive and negative charges. The expectation is that the more the distance between the positive and...
A separation of the positive and negative charges can lead to a weak, remnant effect of the positive and negative charges. The expectation is that the more the distance between the positive and...
5.9K
Electric Field of a Charged Disk
2.2K
The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
2.2K

