The parameters measurement of air-water two phase flow using the electrical resistance tomography (ERT) technique in a bubble column

► Gas bubble behaviors in a bubble column embedded were studied using the ERT technique. ► The bubble Saunter diameter is obtained and the local axial velocity of bubble swarm is calculated. ► The distribution of bubble size is gradually widespread with increase in the gas velocity. ► The local velocity of gas bubble swarm has a center peak distribution.