If i have a real unsteady flow and i use the steady method with fluent, what will be occured?

[momentumwaves]

Originally Posted by Kostas Pan

If i have a real unsteady flow and i use the steady method with fluent, what will be occured?

Not sure about Fluent itself, but, with most solvers I've used of that generation, either of three options (my be others) will occur:

1. Solver blows up! ; or
2. Solver gives incorrect answer - almost a 'flow-averaged' solution;
3. Solver provides an oscillating solution - changes with each iteration step.