[m_zanichelli]

Hello everyone,

This is my first post in this forum but I've been reading you for months.

I have a problem regarding the possible convergence criteria already implemented in OpenFoam. I am working on my master thesis studying the flow over a RAE2822 airfoil in transonic conditions as in https://www.grc.nasa.gov/www/wind/va.../raetaf04.html .

As a SU2 user, quite new to OpenFoam, I expected to find a convergence criterion based on the convergence of an aerodynamic coefficient (lift or drag) (see https://su2code.github.io/docs_v7/Solver-Setup/).

Since I couldn't find anybody that did this before and having never modified a OF solver, I was wondering if the addition of this Cauchy convergence criterion could be done in a reasonable number of hours. Conceptually this is not that hard since I have an output file in the postProcessing folder that enlists the values of the coefficients and I should only access that file, select the window size (number of previous iterations), evaluate the standard deviation of those Cd values and stop if that's below some treshold, giving as output the average value of the aero coefficients. I have no idea on how to do it in OF and so I 'm asking if anybody has done it before or if that could be feasible otherwise. I am currently working on rhoCentralFoam as I need to solve Euler Equations for my project.

Please feel free to ask if anything is unclear.

[HPE]

Hi,

I think you can use a function object: e.g. runTimeControl (see the "condition2" in the link).

Hope this helps a bit.

[m_zanichelli]

Originally Posted by HPE

Hi,

I think you can use a function object: e.g. runTimeControl (see the "condition2" in the link).

Hope this helps a bit.

Thank you very much for your answer. I have spent the past days looking for something like this