A cfMesh workflow to speed up and improve your meshing

Here, I'll cover the basic workflow that I implement when I am using cfMesh. First, when do I use cfMesh? I love cfMesh. I find it robust, easy to use (with this workflow), and gives high quality hex-dominant meshes for use with OpenFOAM. But there are a few cases where I do not use cfMesh. … Continue reading A cfMesh workflow to speed up and improve your meshing

Sutherland’s Law

When working on practical engineering applications, you often encounter problems where there are significant changes in temperature locally in the flow field. For instance, if you are doing a heat transfer calculation, you usually want to use the film properties (aka the properties adjacent to the wall). Doing this in any practical sense requires a … Continue reading Sutherland’s Law

Air Properties Calculator

Here is a little calculator for calculating the properties of air. Enter the pressure (Pa) and Temperature (K), and the calculator should produce an estimate for the specific heat capacities, thermal conductivity, and density. For information on Sutherland's law, see the post on the topic.If you found this useful, and have the need for more, … Continue reading Air Properties Calculator

High-level overview of meshing for OpenFOAM (and others)

Here, I'll give a high-level overview of my opinions on open-source meshing for OpenFOAM. This post should help point you in direction of the mesher you could use to accomplish your simulating goals! But I won't go into each mesher in detail here. As this would become a novel. This is just my opinion on … Continue reading High-level overview of meshing for OpenFOAM (and others)

Pipe Flow Pressure Drop Calculator

Here is a simple tool to calculate the pressure drop along a pipe. It uses the Haaland equation for friction factor to approximate the Colebrook equation. If Re<2300 the flow is assumed to be laminar. If you find a mistake in the calculation, please let us know! If you found this useful, and have the … Continue reading Pipe Flow Pressure Drop Calculator

BASIC kOmega-SST Boundary Conditions

kω-SST (komegaSST) Boundary Conditions Here the basic boundary conditions if you are using the kOmegaSST model in OpenFOAM: At the wall: ω (omega) - specific dissipation rate BC type: fixedValueBC value: $latex \omega_{wall}=10\frac{6\nu_\infty}{\beta_1\left(\Delta y_{wall}\right)^2}&s=3$ Note: The omegaWallFunction actually calculates this BC value for omega at the wall. Therefore, you can use it, even if you aren't … Continue reading BASIC kOmega-SST Boundary Conditions