The design, manufacture and calibration of a range of thin-film, heated-element gauges to measure instantaneous velocity or skin-friction in air, water or blood is described. The probes consist of a platinum resistance thermometer which is heated electrically, with additional elements to detect reversed flow. The manufacturing technique of a flush-mounted skin-friction gauge, and a needle probe currently used in the diagnosis of heart conditions in man, is described in detail.
No takes yet. Share an insight, caveat, or question.
Bellhouse et al. (1968) studied this question.