In this post I am going to simulate an oscillating cylinder in a cross-flow... just for fun... and to provide an additional tutorial case for those wishing to use some of the dynamic meshing features of OpenFOAM. The case I am going to simulate is a cylinder in a Reynolds number 200 cross-flow (U=2 m/s, … Continue reading Oscillating Cylinder in Laminar Crossflow – pimpleDyMFoam
Author: curiosityFluidsAdmin1
Shocktube – rhoCentralFoam TVD Schemes Test
Careful selection of TVD interpolation schemes is important for solving high speed compressible flows. In cases with discontinuities such as shockwaves and contact surfaces, these schemes help keep the simulations free of spurious oscillations. In this post I will use the shock tube tutorial case to test some of the available schemes in OpenFOAM (specifically rhoCentralFoam). I am … Continue reading Shocktube – rhoCentralFoam TVD Schemes Test
Converging-Diverging Nozzle v2- rhoCentralFoam
Recently I read a CFD Online forum post where the accuracy of rhoCentralFoam was called into question. The test case was the simple example of a converging diverging nozzle flow. In fact, I have already done a blog post regarding this. However, I tackled the problem using a large reservoir. In fact, it would have … Continue reading Converging-Diverging Nozzle v2- rhoCentralFoam
Hagen-Poiseuille flow
Here, I am going to go over the solution to fully developed laminar pipe flow. This is a canonical problem and provides an exact solution to the Navier-Stokes equations. It is often referred to as the Hagen-Poiseuille flow problem. The problem is depicted in the figure below: In this problem, we are examining laminar flow … Continue reading Hagen-Poiseuille flow
Couette Flow (Moving Wall)
In this post I am going to go through the solution to the moving wall Couette flow problem. An illustration of the problem is given below: In this problem, the fluid between two parallel plates is being driven by the motion of the top plate. Here, we assume that the flow is axial (v=w=0), incompressible (ρ=constant), … Continue reading Couette Flow (Moving Wall)
Definition of the Speed of Sound
Deriving the speed of sound is a main component of any undergraduate textbook in gas dynamics and is very important to understanding more complicated concepts! Here, I will give an honest attempt to explain and provide definitions of what it is and why it is important .I will go through the derivation of the speed of … Continue reading Definition of the Speed of Sound