From my memories of classes computation fluid dynamics from almost a decade ago: The whole thing was a balancing act of making sure that solutions were converg

From my memories of classes computation fluid dynamics from almost a decade ago: The whole thing was a balancing act of making sure that solutions were convergent and not unstable. Floating point numbers would fall in that category. Ie its OK to be a little a tiny little bit wrong as long as the final result converges on something reasonable. Especially given the other sources of error are magnitudes higher (for instance, picking a timestep that is way too large, relaxation factors when solving... I don't remember exactly but it felt like a bit of an art within engineering to get the thing to be reasonable. https://www.flow3d.com/resources/cfd-101/numerical-issues/numerical-instability/ https://www.flow3d.com/resources/cfd-101/numerical-issues/nu...