How to get the tangential and normal components of fields from FEM softwares?

Finite Element Method (FEM) software often provides results in Cartesian coordinates due to its inherent computational approach. The FEM breaks down complex problems into smaller, manageable elements, typically triangles or quadrilaterals in 2D or tetrahedra and hexahedra in 3D. These elements are defined by their vertices and edges, forming a mesh that covers the entire … Read more

Useful formula for electromagnetism

Here are some useful vector identities commonly used in electromagnetic theory: Gradient of a scalar function: \[ \nabla (\phi) = \frac{\partial \phi}{\partial x} \mathbf{\hat{i}} + \frac{\partial \phi}{\partial y} \mathbf{\hat{j}} + \frac{\partial \phi}{\partial z} \mathbf{\hat{k}} \] Where \(\phi\) is a scalar function and \(\mathbf{\hat{i}}\), \(\mathbf{\hat{j}}\), and \(\mathbf{\hat{k}}\) are unit vectors along the \(x\), \(y\), and \(z\) … Read more

High power coaxial cable

Coaxial cable is a type of electrical cable that is widely used in telecommunications and computer networking to transmit data, video, and audio signals. It consists of a central conductor, which is usually made of copper or aluminum, surrounded by a dielectric insulating layer, and then an outer conductor that is typically made of a … Read more

Install LNMP on Alpine linux quickly

Alpine Linux is a lightweight, security-oriented Linux distribution based on musl libc and BusyBox. Some key things to know about Alpine Linux: So in summary, Alpine emphasizes security and extreme compactness, making it well-suited for containerized environments and constrained hardware while still being a capable general-purpose Linux distribution. Compared with Debian, both package manager and … Read more

How to install Nginx, Mysql, PHP (LNMP) on Debian linux quickly and transfer datas

LNMP is a software bundle that stands for Linux, Nginx, MySQL/MariaDB, and PHP. It is a popular stack for building web applications and hosting websites on Linux-based operating systems, particularly on Debian and Ubuntu. If you need to set up a web server to host and serve dynamic websites, web applications, or content management systems … Read more

Standard rectangle waveguide

A rectangular waveguide is a type of electromagnetic waveguide with a rectangular cross-section. It is used to guide electromagnetic waves, typically in the microwave frequency range. The dimensions of the waveguide are critical for determining its operating characteristics. The standard rectangular waveguide has two parallel broad walls and two narrow walls. The width (a) and … Read more

A web-based Computer algebra system

A Computer Algebra System (CAS) is a software program or system designed to perform symbolic mathematical computations. Unlike numerical computing, where values are represented and manipulated in a numerical form, CAS deals with mathematical expressions in symbolic form. This means that CAS can manipulate algebraic expressions, equations, and mathematical objects symbolically, allowing for operations like … Read more

Physical constants and functions in Comsol.

COMSOL Multiphysics is a software platform used for modeling and simulating physics-based systems. It is particularly popular for its capabilities in multiphysics simulation, which means it can handle simulations involving multiple physical phenomena simultaneously. This includes, but is not limited to, heat transfer, fluid dynamics, electromagnetics, structural mechanics, and chemical reactions.Users can create models in … Read more

Enrichment Process for Separating Deuterium from Water

Deuterium, often referred to as “heavy hydrogen,” is an isotope of hydrogen with one proton and one neutron in its nucleus. Separating deuterium from water, which contains both regular hydrogen (H) and deuterium (D), is known as isotopic separation or enrichment. One widely used method for this separation is hydrogen distillation, a multi-stage process leveraging … Read more