Microcomputer-based flowmeter for determining average liquid phase flow in a two-phase fluid

A microcomputer-based flowmeter was developed to meter the average liquid phase flow in a two-phase fluid, where the two phases are liquid and gas. An experimental system was set up to test the flowmeter and to develop a mathematical model for the device. The resulting experimental model fits the data with a prediction error of less than 0.2 percent of flow rate over the tested span of zero to five gallons per minute. A microcomputer performs all flow calculations using the model, and also controls flowmeter functions and displays diagnostic information.