This repository contains a Computational Fluid Dynamics (CFD) simulation application built with Python, NumPy, and Gradio. The application simulates the unsteady fluid dynamics and vortex generation produced by an asymmetric oscillating body (biomimetic resonator / "flying saucer" model) operating in a viscous medium, utilizing the Lattice Boltzmann Method (D2Q9 model).
The simulation is mathematically and physically grounded in the experimental and theoretical research of asymmetric vibration dynamics in fluid media.
The core operational principle relies on the non-linear effects of unsteady fluid dynamics investigated by S.A. Gerasimov (2008).
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Dynamic Boundary Layer Modification: When a plate or asymmetric body undergoes rapid, high-frequency oscillations, the aerodynamic drag coefficient (
$C_d$ ) increases dramatically—reaching values up to$\approx 6.5$ , compared to the steady-state value of just$1.1$ in uniform wind tunnel flows. -
Added Mass Interaction: This anomalous drag multiplication is caused by the heavy involvement of the fluid's added mass (
$M_{added}$ ). The rapid directional shifts of the boundary layer trap and accelerate the surrounding medium, creating highly localized pressure gradients.
Contrary to classical intuition regarding symmetric mass expulsion, an asymmetric vibrating body generates directed propulsion through medium management (Kandyba, 2025):
- Vortex Ring Formation: During the cycle of high-acceleration oscillation, the asymmetric geometry separates the fluid flow unevenly, generating coherent toroidal vortex structures (vortex rings).
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Pressure Drop Generation: These vortices act as a collapse of low-pressure zones with the release of free thermal energy of the environment in the form of self-organization of Brownian motion. By controlling the velocity profile asymmetry (the wave acceleration profile), the resonator creates a sustained pressure differential (
$\Delta P$ ) between its upper and lower surfaces, producing a clean net thrust vector without requiring traditional open-loop propellant ejection. - Simulation: The solution represents an empirical simplified model – by accumulating the resistance energy from the oscillations and releasing it as a force in the opposite direction in the next half-cycle. This allows for a fairly realistic visualization of the experimentally observed phenomenon.
In advanced theoretical frameworks, this mechanism is modeled as a macroscopic analogue to an elementary particle interacting with a non-empty vacuum substrate. By manipulating the local boundary layers and vortex filaments, the craft transitions from "expelling mass" to "modifying the medium geometry," representing a biomechanically inspired step toward advanced propulsion.
- Zenodo Publication (2025): Multimodal Aeroacoustic Aircraft Based on an Oscillating Resonator: From Laboratory Models to Quantum-Hydrodynamic Propulsion
- Logos Online Journal (2021): Flying Saucer Experimental Research, Aerodynamics Unexplored Phenomenon and Bird's Flight
- Patent Reference: Lozovsky L. (1998). Method of vehicle movement and a universal "vibroplane" device for its implementation. Patent RU 2147786 C1.
- Official YouTube Channel: Prometheus Aerospace (Experiments & Prototypes)
The simulated Python application allows you to tweak the physical parameters of the fluid and the vehicle in real-time via a Gradio Web UI:
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Fluid Properties: Adjust grid relaxation time (
$\tau$ ), modifying fluid viscosity and Reynolds number dynamics. -
Object Mass: Scale the inertia of the body to observe how it handles buoyancy vs. acceleration forces.
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Dynamic Waveform Editor: * Frequency (Hz) & Oscillation Amplitude control the kinematics of the resonator.
- Velocity Profile Asymmetry changes the stroke acceleration bias to optimize thrust generation.
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Visualization Modes: Toggle between Velocity Magnitude mapping and Vorticity fields using a professional high-contrast multi-color CFD palette.
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Try it Online
You can try for free online: 🛸🌊CFD Simulation