Ultrasound Doppler system for two-dimensional flow mapping in liquid metals

A novel ultrasound Doppler measurement system for investigating liquid metal flows is presented. It employs an array of 25 transducer elements allowing a fast electronic traversing with concurrently high spatial resolution and therefore overcomes the limitations of commercially available ultrasound Doppler devices. For a high temporal resolution investigations were performed to parallelize the measurements as much as possible. Their results proved this parallel processing technique allowing a four times higher measurement rate compared to a serial processing for our specific ultrasound Doppler system. Therewith, a first two-dimensional one-componential flow mapping of liquid metal flows driven by a rotating magnetic field was successfully performed. In objective, this measurement system will be extended to a two-componential flow mapping.