DESIGN OF CAPACITIVE SENSING SYSTEM FOR HOLDUP MEASUREMENT IN TWO-PHASE STRATIFIED FLOW

Two-phase flow occurs in the presence of two immiscible components inside pipelines or process equipment. They are frequently found in the petroleum, nuclear and chemical industries. Different flow patterns can be observed when the two-phase components are flowing together, where stratified flow can be easily seen in gas-liquid and liquid-liquid flow at moderately low flow rate. The holdup value of the two-phase component is one ofthe important criteria to be measured in two-phase flow, which can be defined as the ratio of the volume of a pipe segment occupied by one of the component to the volume of the pipe segment. A number of techniques have been applied to measure the holdup value in two-phase flow