LaVision‘s SprayMaster laser imaging system applies LIF and Mie imaging on pulsed laser light sheets. While the volume dependent LIF signal scales with the droplet mass, the simultaneously excited Mie signal is proportional to the droplet surface. Hence the LIF/Mie image ratio is used for planar global droplet sizing yielding the Sauter Mean Diamter (D32) distribution over the measured spray cross section.
A special 2-color Tracer-LIF technique allows the simultaneous visualization of the liquid and vapor phase of the evaporating spray.
DaVis supports time resolved 3D spray imaging applying phase scans in combination with light sheet traversing. Such a measurement sequence can be programmed in DaVis and then simply started with a button click.
PIV imaging is applied to the spray droplets and the surrounding gas (with additional seeding) for multiphase flow field imaging in sprays using LaVision‘s low and high speed FlowMaster PIV systems.