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Numerical Study of Entropy Production in a Fluidic Oscillator
José Omar Dávalos1, Delfino Cornejo-Monroy1, Alfredo Villanueva-Montellano1
1Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32310, Chihuahua, Mexico.
Entropy (Basel, Switzerland)
|May 4, 2026
Summary
Entropy generation in fluidic oscillators was quantified using computational fluid dynamics (CFD). Results show entropy generation follows jet switching, increasing with Reynolds number and linked to flow dynamics.
Area of Science:
- Fluid Dynamics
- Thermodynamics
- Computational Science
Background:
- Fluidic oscillators are devices that utilize fluid dynamics for oscillation.
- Understanding entropy generation is crucial for optimizing energy efficiency in fluidic devices.
Purpose of the Study:
- To numerically quantify entropy generation in a fluidic oscillator.
- To investigate the relationship between entropy, Reynolds number, and flow dynamics.
Main Methods:
- Transient computational fluid dynamics (CFD) simulations.
- Utilized the k-ω shear stress transport (SST) turbulence model.
- Calculated local entropy production rate and total entropy.
Main Results:
- Total entropy evolved periodically with jet switching, amplitude increasing with Reynolds number.
- Local entropy production concentrated near feedback channels, Coanda surfaces, and jet interaction zones.
- Elevated entropy observed at outlet corners due to expansion and pressure drop.
Conclusions:
- Entropy generation is directly linked to the jet switching motion within the oscillator.
- Viscous dissipation and flow dynamics significantly influence entropy generation.
- Results provide insights into optimizing fluidic oscillator performance and energy efficiency.
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