Abstract
In order to study convective heat transfer and flow in a model water way, it is strongly desirable to measure local flow velocities in the range as wide as 10-2 to 101cm/s, using weak electrolyte.
A new method has been developed for this purpose, in which an electrolyzed boundary is produced in the weak electrolyte by a DC current along the single probe and is used as a mark which moves together with the liquid flow.
The applicable ranges of this method are: flow velocity range; 0.02∼12.5cm/s, liquid temperature range; 20∼57°C, and resistivity range of electrolyte; 1>×104∼2×105Ω·cm.
In the measurement of the velocity profile in a vertical channel, the measured and pre-set mean velocities agreed with the accuracy better than±10%.
