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.