1. Corresponding increase in 30 micron mode with increasing TOPAS feedrate while maintaining head pressure at 25 psi. Higher feedrates promote an increase in the number of large particle clusters ??? Enhanced 30micron particle cluster breakup at 90% feedrate using a head pressure of 50 psi Possible effect of pressure shear on 30micron cluster breakup using the TOPAS SAG410 powder disperser as visualized by Sympatec laser diffraction

2. Material size distribution with sympatec laser diffraction and custom lens (air curtain) protection using TOPAS sag410 powder disseminator at three feedrates and 25psi head pressure at ECBC breeze tunnel 10 Jun 2011 Three measurement trials per material with 10 – 2 second measurements per trial

3. Size distribution comparison for material disseminated using the TOPAS sag410 (30% feedrate; 25psi) and the Metronics Skilblower (Dugway sep 2010) as measured by Sympatec Laser Diffraction Possible intermittent sloughing of particles from the cowling of the skillblower centrifugally impacted by the fan blades Potential for a further reduction of 30 micron mode with an increase in TOPAS head pressure provides a clue to material characteristics and of intermolecular forces