For different flow applications proper seeding tracers are needed. Depending on the application LaVision is offering several solid particles and liquids to be used in suitable seeding devices.
The tracers are characterised by sufficient light scattering, perfect signal quality and very good traceabilty to the flow.
HFSB soap fluid
The soap fluid is a colourless fluid for generating soap bubbles at an extremely high rate. Soap fluid and the corresponding seeding device are used especially where a big amount of particles are needed e.g. in wind tunnels and/or large scale PIV measurements. A proper seeding device is needed.
DEHS is an odourless and colourless liquid. It´s insoluble in water and the droplets have a long lifetime. For generating particles a proper seeding device is needed.
Fog fluid is an odourless fluid. For generating particles a proper seeding device is needed. Fog fluid and the corresponding seeding device are used especially where a big amount of particles are needed e.g. in wind tunnels.
|HFSB Soap fluid||0.95 l|
|Fog fluid||5 l|
Due to its very porous structure of the agglomerated particles Aerosil is an ideal seeding material for PIV applications in combustion research:
LaVision’s Titanium Dioxide is a surface treated, hydrophobic, highly insoluble and thermally stable material. Due to its submicron mean size and nanopowder form TiO2 is an ideal seeding material for PIV applications in combustion research:
Due to its lubricating properties graphite particles offered by LaVision are an ideal seeding material for PIV applications in engines.
|Titanium dioxide||0.5 kg|
All these particles require a proper seeding device.
Due to its almost perfectly spherical particle shape the polyamide particles offered by LaVision are an ideal seeding material for PIV applications in liquids. A safe handling with these particles is guarenteed because of their non-toxic, non-water polluting nature.
|Polyamide particles, 55 µm, 1.2g/cm³||0.5 kg|
|Polyamide particles, 100 µm, 1.1 g/cm³||0.5 kg|
|Polyamide particles HQ, 20 µm, 1.03g/cm³||0.5 kg|
|Polyamide particles HQ, 60 µm, 1.03g/cm³||0.5 kg|
Glass hollow spheres:
Glass hollow spheres are borosilicate glass particles with a spherical shape and smooth surface. Silver coated (SC) hollow spheres are available as well.
|Glass hollow spheres, 9-13 µm, 1.1g/cm³||0.5 kg|
|Glass hollow spheres SC, 10 µm, 1.7 g/cm³||0.5 kg|
|Ceramic hollow spheres (SC), 100 µm, 1.1 g/cm³||0.5 kg|
Fluorescent seeding particles are based on melamine resin, polystyrene or PMMA.
The fluorescent dye (Rhodamine B or Rhodamine 6G) is homogeneously distributed over the entire particle volume. Especially in PIV applications with a high background light level fluorescent seeding particles can enhance the signal to noise ratio. The optics of receiving devices must be equipped with a suitable filter centered on the corresponding wavelength. For µPIV applications the fluorescence is essential to separate the particle signal from the background scatter light. To separate the light emitted from the particles an epi-fluorescent microscope with filter cube is required.
|PS, Rhodamine 6G, 0.3 µm||15 ml|
|PS, Rhodamine 6G, 0.5 µm||15 ml|
|PS, Rhodamine 6G, 0.9 µm||15 ml|
|PS, Rhodamine 6G, 2.0 µm||10 ml|
|PS, Rhodamine B, 2.0 µm||10 ml|
|PS, Rhodamine B, 1 - 20 µm||1 g|
|Melamine, Rhodamine B, 10 µm||10 ml|
|PMMA, Rhodamine B, 1-20 µm||1 g|
|PMMA, Rhodamine B, 20-50 µm||1 g, 25 g, 50 g, 100 g|