RTI uses cookies to offer you the best experience online. By clicking “accept” on this website, you opt in and you agree to the use of cookies. If you would like to know more about how RTI uses cookies and how to manage them please view our Privacy Policy here. You can “opt out” or change your mind by visiting: http://optout.aboutads.info/. Click “accept” to agree.
Measurements of the size distribution of aerosols produced by ultrasonic humidification
Rodes, C., Smith, T., Crouse, R., & Ramachandran, G. (1990). Measurements of the size distribution of aerosols produced by ultrasonic humidification. Aerosol Science and Technology, 13(2), 220-229. https://doi.org/10.1080/02786829008959440
Aerosol number and mass distributions produced by an ultrasonic room humidifier and an ultrasonic medical nebulizer were examined in a limited-scale study. Rapid droplet drying occurred at room humidities and under near saturated conditions. A model was tested describing the diameter of dried particles as a function of the dissolved mineral content of the water and the transducer frequency. Water containing 102 mg/L of dissolved minerals in a humidifier with a 1.6 MHz transducer produced droplets with a mass median diameter of 2.9 ?m. The number median diameter of particles after drying was computed to be 0.11 ?m. The distribution of particles in a nebulizer tube using a NaCl solution was shown to consist of a mixture of dried salt particles and droplets which included coagulated multiplets.