Measuring velocity in high-temperature liquid metals: a review

All fluid mechanics problems in metals-processing operations are associated with the measurement of fluid velocity. The development of various models of predicting fluid flow characteristics in complex engineering problems has increased the need for fluid velocity measurements. These measurements provide the necessary validation and tuning for model predictions. In addition, measurement of fluid velocity can be used as a tool for process control purposes. Moreover, the continuous push of metal industries for improved quality and efficiency in liquid metal processing operations, has further highlighted the need for liquid metal velocity measurements. This review presents the various techniques used so far to measure velocity in liquid metals. It outlines the advantages and disadvantages of each technique and provides the reader with information for critical analysis.