ddt (rho U) + div (rho U U) – laplacian (mu U) = – grad (p)
Swimming is a kind of sports. CFD (Computational Fluid Dynamics) is to analyze fluid flow numerically using computers with some discrete models. Because of movement in water, the resistance generates. In order to decrease the resistance to improve the movement Continue reading Swimming and CFD
Today afternoon, I went swimming, which was my first swimming this year. I have swimmed for about 500 meters with breaststroke, which is the only swimming style I can do. I learned to swim at the university. Before that, I Continue reading First Swimming This Year
Generally, in the explicit schemes of differential method, Courant number is an important number which should be less than 1 in order to assure the stability. However, if the Courant number is too small, much computation time will be lost. Continue reading Run a Case with Variable Time Step in OpenFOAM
Linear Equation Systems are most concerned in modern scientific and engineering computation, because most problems can be described by (partial) differential equations which could be discretized to a system of algebraic equations which can be solved on a computer. There Continue reading Solutions of Linear Equation Systems Used in OpenFOAM
I have not speak English for a long time so that I was nervous when I speak it using Internet chatting tool, UC. There are some hot chatting room which people can speak English, encourage each other to get over Continue reading Long time No Speaking English
From the “5.12” Wenchuan Earthquake, there has been a heated discussion in China about whether human can predict earthquake or not. Some people think human can investigate animal’s abnormal phenomena, such as sudden migration, to predict earthquake happening, while others Continue reading Can Human Predict Earthquake?