Finite

Today, solve one of the NAFEMS Benchmark tests for thermal analysis using COMSOL. (ref : A.D. Cameron, J.A. Casey, and G.B. Simpson, NAFEMS Benchmark Tests for Thermal Analyes. NAFEMS Documentation) The problem definition is as follow. The geometry has a height of $1m$ and width of $0.6m$, with the bottom boundary fixed at a temperature of 100 degrees Celsius. The left side is a perfect insulato..

Today, I'll simulate the interference between two slits composed of waves or sound using COMSOL. I'll generate plane waves using two thin wavelengths leading to the slits on the screen and calculate the pattern on the opposite side. For detailed information, please refer to the COMSOL Application Library. Theoretically, the amplitude becomes minimal where the difference in path length is an odd ..

Since its first time conducting CFD through COMSOL, I plan to follow the "Flow past a Cylinder" example found in the COMSOL application manual. Fluid flow becomes unstable behind large bodies, making it challenging to compute. The wake formed behind the body generates significant resistance due to all sizes of disordered vorices. However, turbulence in the thin boundary layer beside streamlined ..

I didn't finish the previous post because I felt like needed to study more about mechanical vibration. In fact, it's still obviously not perfect, but I'm going to use what I've learned, so there will be some errors. In the previous post, I mistakenly wrote the formula for the first natural frequency as a circle. First natural frequency formula for beam is where $L$ is length, $E$ is young's modu..

Modal analysis is a method for analyzing the vibration characteristics of a system. Modal analysis can reveal important characteristics of a system, such as natural frequencies and mode shapes. With this information, it is important to predict whether the structure is resonant and how it will deform under vibration. where $m$ is mass, $c$ is damping coefficient, $k$ is spring constant, $x(t)$ is..

In the previous post, I used HyperMesh to perform buckling analyses, calculate analytic solutions, and compare them. In this post, I'll use COMSOL to solve the same problem. I'm actually more familiar with HyperMesh than COMSOL, so my method may not be correct and there may be a better way. I use COMSOL Multiphysics 6.0 version Run COMSOL - 2D - Beam - Add - Study Preset Studies for Selected Phy..

This example is also cantilever beam. but it use COMSOL Multiphysics (6.0 version) Run COMSOL - 2D - Beam (beam) - Add - Study General Studies - Stationary - Done Set Unit System : None Right-click the Geometry - More Primitives - Polygon Start point : (0, 0) End point : (120, 0) Linear Elastic Material Young's modulus : 29e6 ∵29e3 ksi = 29e6 psi = 29e6 lb/in^2 Poisson's ratio : 0 Density : 0 Cr..