Abstract
The key aspects of a new method, bubble-image barometry (BIB), which can measure both pressure and velocity, are described. BIB extends correlation-based particle-image velocimetry techniques to provide simultaneous pressure and velocity measurements over a global domain. The particles used in BIB (gas bubbles) serve two purposes: (i) they are small enough to track the flow and serve as tracers for the velocity field; and (ii) they behave as local pressure sensors by changing their size in response to the instantaneous pressure field. The present work explores the theoretical and practical issues involved in BIB by first introducing the relation between the bubble-image size and its spatial correlation function. Next, computer-generated bubble images are used to investigate the feasibility of the technique. Finally, a pressure-chamber experiment, wherein microscopic air bubbles are generated and used as tracer particles to measure pressure, is presented. Results obtained from the experiment show that BIB is a viable technique for a certain range of bubble sizes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
