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Micro Bubble Generator BG-1000

SKU: BG-1000

The Bubble Generator BG-1000 generates the ideal seed particles for wind tunnel and aerodynamic flows for planar and volumetric PIV measurements.

Product Details

The TSI Bubble Generator BG-1000 surfactant/water-based micro bubble generator (patent pending US 2011/0284648 A1), is designed to produce large amounts of bubbles as seed particles for Particle Image Velocimetry (PIV) – planar and volumetric, for flow measurements in wind tunnels (opened or closed type) or open environments. The bubbles, with a mean diameter of 15 microns, are excellent to follow the flow around small structures or in boundary layer, to provide measurements with the highest accuracy and spatial resolution. The high concentration output of 107 bubbles/s and the long residence time, make this generator the ideal choice for your flow applications.

The surfactant/water-based bubbles with 15 micron mean size, allow planar PIV measurements with field of view up to 1.5 m by 1.5 m, as well as volumetric PIV with a volume size of more than 6000 cm3, and has excellent fidelity to resolve small structures of the flow.

Two models of the micro Bubble Generator are available: BG-1000 and BG-1000E. The two models have identical features and benefits, with the exception of voltage input. The BG-1000 requires input voltage of 110V, while the BG-1000E has a 220V power requirement. Close up image of the spherical shaped bubbles with high scattered intensity:



  • Wind tunnel flows
  • Airflows in large scale facilities
  • Turbulent boundary layers
  • Flows around airfoil or objects
  • Wake flows
  • Two phase flows

Features and benefits

  • Bubbles with size of 15μm and neutrally buoyant in air flow environment
  • Bubbles spherical in shape, generating high intensity for large field of view or volume, at magnification of 0.025 or higher, without glared points
  • Long residence time of more than 30 minutes, making long time duration measurements feasible
  • Short settling velocity of 0.18 mm/s, giving the fidelity for the bubbles to follow flow around small structures
  • High bubble output of more than 107 bubbles/s and high concentration of 20,000 bubbles/cc at the exit of nozzle, allowing the extraction of the smallest flow structure in measurements
  • Non-toxic and non-stick on window surface due to the low viscosity of the surfactant/water mixture
  • Easy to operate, as the generator is ready to be used in less than 5 minutes
  • Low cost of operation and ownership with simple and easy maintenance procedures without additional gas to purchase