[wildfire230]

Hi all,


I have a steady simulation with a primary velocity component of around 1e-3 m/s, and secondary velocity components (which I need to resolve accurately) that are around 1e-8 m/s. I am using simpleFoam to solve the flow, and I am facing some uncertainty about what magnitude to set the residuals in order to properly resolve the flow. For example, if I need a precision of 1e-10 m/s on the y-component of velocity, does that mean I need to wait until the initial residual for Uy is less than 1e-10?


I was just wondering if there is a simple way to estimate the needed residuals based on the needed precision in physical variables.


Thanks so much