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Flow physics of planar bistable fluidic oscillator with backflow limbs
Ketan Madane1, Chirag Khalde2, Ajinkya Pandit1
1Department of Chemical Sciences Multiphase Reactors and Intensification Group (mRING) Synthesis and Solid State Pharmaceutical Centre (SSPC) Bernal Institute, The University of Limerick Limerick Ireland.
Aiche Journal. American Institute of Chemical Engineers
|April 10, 2023
Summary
This study computationally analyzes a new fluidic oscillator (FO) design with backflow limbs. The research quantifies jet oscillations and flow dynamics, offering insights for optimizing FO applications in process control and intensification.
Area of Science:
- Fluid Dynamics
- Computational Fluid Dynamics (CFD)
- Engineering
Background:
- Fluidic oscillators (FOs) are vital in process control and intensification.
- Their fluid dynamics present complex behaviors like jet oscillations and vortex formation.
- These phenomena significantly impact mixing and transport processes.
Purpose of the Study:
- To computationally investigate the fluid dynamics of a novel planar FO design with backflow limbs.
- To analyze unsteady flow, recirculation, jet oscillations, and vortices across various Reynolds numbers.
- To validate computational findings against experimental measurements.
Main Methods:
- Utilized computational fluid dynamics (CFD) to model a new planar FO design.
- Studied flow dynamics over a Reynolds number range of 2400–12,000.
- Quantified jet oscillation characteristics and compared computed frequencies with experimental imaging data.
Main Results:
- Detailed characterization of unsteady flow, internal recirculation, and secondary vortices.
- Quantification of jet oscillation nature and frequency.
- Successful comparison of computed and experimentally measured jet oscillation frequencies.
Conclusions:
- The new FO design exhibits bistable flow characteristics.
- The computational model accurately predicts FO jet oscillation frequencies.
- Provides a foundation for designing FOs with tailored flow and transport properties for engineering applications.
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