HPC Model Review: Difference between revisions

Sensitivity run can be done by reducing timestepping interval using Control Number Factor == 0.8. This reduces the timestep (as dictated by the three control numbers) by the factor 0.8, making the simulation to take roughly 20% longer. If comparing the two results shows negligible differences it is a strong indicator ofthe default control number limits may be noconsidered bouncessatisfactory. If there are areasunacceptable with significantmeasurable differences, the location of these areimpacts likelymay also help to bespatially areasidentify ofwhere the solution may have been struggling at the default numericalcontrol bouncesnumbers. ToThese areas can then be extrainspected surefor re-runinput withtopography Controlor Numberboundary Factorconditions 0errors.5 Models shouldn’t need to have the CNF lowered any more than this, as if they do, it would indicate there is more likely an underlying model configuration issue that needs attention.