Critical view on "new results in micro-fluid mechanics": an example

Experiments in micro-flow devices almost always show deviations compared to the corresponding situations in macro-systems. Often special "micro-effects" are proposed to explain these unexpected results. However, based on a nondimensional form of the problem formulation these "micro-effects" can be identified as scaling effects referred to a standard analysis in macro-dimensions. Thus many "unexpected results" can be explained. This is demonstrated for a specific example recently published in this journal.