EXPERIMENTAL STUDY OF SINGLE PHASE FLUID FLOW LOSS COEFFICIENT IN MICROCHANNEL BENDS

• Main Author: Junianto, Endro
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/53277
• Institution: Institut Teknologi Bandung

Along with the development of technology, interest in the utilization of micro-fluid channels (micro-channel) is increasing. Fluid flow will not be separated from flow losses, especially when the fluid passes through bends and friction on the channel wall surface. The purpose of this study was to determine the value of the loss coefficient and the value of pressure drop due to changes in the aspects of the cross-sectional diameter, angle of bending, and the Reynolds number value in the micro-channel. The research method used is an experimental method which is carried out in the laboratory by observing the research parameters in the form of water and kerosene flow that is passed through the micro-channel bends with varying angle of bending 45o, 60o, 90o, 120o, and 135o and varied cross-sectional diameter of 348 ?m, 1204 ?m, and 1860 ?m and the Reynolds number. The Reynolds number range in this test is 60–7905. The test results show that the pressure drop increases and the bends loss coefficient decrease with increasing Reynolds number at each variation of the bending angle. An increase in the angle of bends and a decrease in the cross-sectional diameter at the same Reynolds number causes an increased pressure drop. The bends loss coefficient decreases with the increase in the magnitude of the angle of bends and the reduction in the cross-sectional diameter at the same Reynolds number. The test channel at a bending angle of 90o has a bends loss coefficient above 0.9. The pressure drop per unit length increased from 0.04–13 kPa as the Reynolds number increased over the range 60–5929.