http://www.theregister.co.uk/2016/05/23/the_underbelly_of_simulation_science_replicating_the_results/

Their next step, to make the work easier for other researchers to replicate their results, was a replication study on other packages...

That's where things got painful, they write: to get where they expected to get needed “three years of dedicated work that encountered a dozen ways that things can go wrong, conquered one after another, to arrive finally at (approximately) the same findings and a whole new understanding of what it means to do “reproducible research” in computational fluid dynamics.”