Establishing grid convergence is a necessity in any numerical study. It is essential to verify that the equations are being solved correctly and that the solution is insensitive to the grid resolution. Some great background and details can be found from NASA: https://www.grc.nasa.gov/WWW/wind/valid/tutorial/spatconv.html First, here is a summary the equations and steps discussed here (in case … Continue reading Establishing Grid Convergence
Tag: CFD
The Ahmed Body
The Ahmed body is a geometric shape first proposed by Ahmed and Ramm in 1984. The shape provides a model to study geometric effects on the wakes of ground vehicles (like cars). Image highlights: In this post, I will use simpleFoam to simulate the Ahmed body at a Reynolds number of 10^6 using the k-omega … Continue reading The Ahmed Body
Validation: Turbulent Zero Pressure Gradient Flat Plate – simpleFOAM, komegaSST
An excellent test case, and case to familiarize yourself with some of the turbulence models available in OpenFOAM is a 2D flat plate with zero pressure gradient. I will solve this problem using the solver simpleFoam and the komegaSST model. Here are the sections of this post: Quick Overview: kω-SST (komegaSST) Boundary Conditions Case set-up … Continue reading Validation: Turbulent Zero Pressure Gradient Flat Plate – simpleFOAM, komegaSST
Pressure Driven Nozzle Flow with Shock – rhoCentralFoam
In this post I will go over the set up and solution of a pressure driven nozzle flow with a shock located in the diverging section. This refers to the type of flow problem described by region b in my page covering stationary normal shock-waves. Here is a summary of the contents of this post: Nozzle Design … Continue reading Pressure Driven Nozzle Flow with Shock – rhoCentralFoam
Solving the cavity flow problem using the streamfunction-vorticity formulation
The classic lid-driven cavity flow problem is solved using the vorticity streamfunction formulation and compared to a solution using OpenFOAM.