[highpressure]

Hello FOAMers,

I'm currently conducting a Grid Convergence Analysis for my CFD project. Based on my literature review, I've found that using a representative cell length is preferable to merely considering the number of cells (Celik et al. 2008, and scroll down). The calculation of this representative cell length requires not only the total number of cells in the domain but also the surface area of each cell. Unfortunately, the checkMesh command does not provide this information.

My question is: given that I'm using blockMesh and snappyHexMesh for meshing, how can I extract the area of each cell to calculate the representative cell length of my mesh?

Thank you in advance for your help.

Best regards,
Ilyes

[rocketLauncher]

Hello Ilyes,

You could use the following command line to extract the cell centres and cell dimensions

postProcess -func writeCellCentres -time 0

Perhaps with that information you will be able to calculate the cell length? Is there some formula?

For a grid convergence study, it is a widely acceptable practice to monitor mesh size (number of cells) against different key variables, just as an fyi. Best of luck, I hope this helps.