Proposal of Tomographic Resistivity Distribution Measurement Method of Two-phase Flow in Microchannel for Heat Exchanger

抄録

  This paper has launched a concept of tomographic resistivity distribution measurement in a microchannel for a heat exchanger. With the concept, cross-sectional images of assumed resistivity distribution due to micro bubble in an electrical resistance tomography (ERT) has been simulated by using algorithms of forward and inverse problems. The first step of the algorithm is a forward problem; namely, it is to calculate an electrical potential on electrodes from the assumed resistivity distribution by solving the Maxwell equation. The second step of the algorithm is an inverse problem; namely, it is to calculate the resistivity distribution from the electrical potential on the electrodes calculated by the forward problem. In order to discuss the concept availability in the inverted annular flow and the stratified flow, the simulation results show that the flow condition depends on the correlation. Especially, the stratified flow has a high correlation coefficient as compared to the inverted annular flow.