With the work that Conflux Technology does, Finite Element Analysis or FEA is an integral tool for developing our lightweight and compact, high performance additivemanfactured heat exchangers. Whilst simulation tools do not make the need for physical testing redundant, they do provide us with an indication as to how our parts will behave in end use. Determining the natural frequencies of our parts is a fundamental stage of our design process, as this enables us to investigate the effects of inertia and vibration.