Two Dimensional Orifice Array, Monodisperse Drop Source. Phase 1
Abstract
An acoustically driven drop generator ha been constructed. It differs from other such devices in that it generates drops in a two-dimensional array. Further, the generator can break the liquid jets into uniformly-sized drops with diameters smaller than the minimum sized predicted by Rayleigh's theory. One or two sizes of drops can be produced with diameters between 70 to 200 microns. The liquid jets are formed by liquid flowing from a constant pressure manifold through openings in a plate. The plate is made of laminated nickel and copper. Several plates with different hole patterns were constructed. The number of openings in the plates varied from 24 to 1010. The diameter of the openings ranged from 38 to 112 microns. A piezoelectric transducer creates pressure perturbations in the jets' velocity, forcing them to break into drops at the perturbation frequency. A signal generator provides one, two, or three sinusoidal signals for generating the input acoustic signal. A power amplifier boosts the signal and feeds it to the piezolectric transducer. The jet breakup is observed and photographed through a microscope.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1989
- Accession Number
- ADA211319
Entities
People
- John L. Dressler