What question did this study set out to answer?

The study aims to evaluate the reliability of a BGK-type model for sound wave propagation in binary gas mixtures under specific conditions.

April 1, 2026FluidsOpen Access

Sound Wave Propagation in Binary Gas Mixtures Flowing Through Microchannels According to a BGK-Type Kinetic Model for General Intermolecular Potentials and Maxwell Boundary Conditions

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This work assesses sound wave propagation in binary gas mixtures, indicating a novel model's reliability for varying intermolecular potentials.

The study aims to evaluate the reliability of a BGK-type model for sound wave propagation in binary gas mixtures under specific conditions.
Investigated high-frequency sound wave propagation in binary gas mixtures.
Utilized a BGK model of the linearized Boltzmann equation for analysis.
Applied Maxwell boundary conditions with different accommodation coefficients for each gas species.
Specialized computations for mixtures with disparate masses, like He-Xe.
Compared results with the McCormack model to validate findings.
The new BGK model provides accurate predictions for sound wave behavior in gas mixtures with different mass components.
Results align well with experimental data when compared to the McCormack model.
The model effectively incorporates various intermolecular forces and gas-wall interactions.

Silvia Lorenzani (2026) studied this question.

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This work assesses sound wave propagation in binary gas mixtures, indicating a novel model's reliability for varying intermolecular potentials.