Abstract
The VMR Titan-2.0 is a physical, buildable Ultrasonic Microbubble Generation and Resonance Control System. It generates precise populations of microbubbles (10–100 µm) using a venturi-jet or ultrasonic cavitation method, then actively stabilizes their size distribution and resonance frequency using real-time acoustic feedback.
In engineering terms, "Variable Microbubble Resonance" is implemented as a Closed-Loop Ultrasonic Cavitation Controller running on an FPGA. It uses the Minnaert Formula (
f
0
≈
2πR
1
ρ
3γP
) to target specific bubble sizes by tuning the ultrasonic drive frequency and pressure. It monitors the acoustic signature (subharmonics/ultraharmonics) of the bubble cloud to detect "microbubble drift" (size changes due to coalescence or dissolution) and adjusts the drive parameters instantly to maintain a stable resonance envelope.
This document provides the exact specifications, Bill of Materials (BOM), schematics, and FPGA control logic to construct a prototype capable of generating stable microbubble clouds for wildfire suppression research (water mist enhancement) and biomedical flow studies (phantom models), with <5% size distribution variance.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Caldwell, Michael Victor Mr., "VMR Titan-2.0: Variable Microbubble Resonance Engine (Physical Prototype Edition) Date: 2026-07-29 Status: Open-Hardware • Builder-Grade • Test-Bench Ready", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/11223