The long-term objective of the ash particle dynamics studies is to elucidate the physical conditions under which ash particles deposit or agglomerate. Of particular interest are the results of particle-particle and particle-wall collisions. The outcomes of such collisions will depend on ash particle composition, temperature, viscosity, surface tension, diameter, momentum, and impact parameters. The possible results of collisions include agglomeration, deposition, and shattering. To investigate the effects of these collisions, the DEM technique is being used. A cold-flow model of this device is being constructed and used to accelerate and aim the particles, measure their incoming and exiting angles, and observe the results of collisions. The modified dielectrophoretic manipulator (DEM) power supply has been tested. The new power supply operates at 800 (compared to the former 200) volts. It also distributes the voltage to the individual electrodes through a bank of relays that are manually controlled by a rotary multi-pole switch. This design will facilitate transition to computerized operation because the rotary switch can be readily replaced with a computer interface. The movement of particles during these tests was more reproducible than the movement during the lower voltage tests. Performance has been improved by removing the glass plates that prevent particles from contacting the electrodes. This places the particle in higher field gradient regions, but increases the probability of arcing. The unit cannot be used with conducting particles, but this poses no difficulty for ash experiments. This configuration can be tested with glass spheres. The presence of static charges or surface bonding is restricting the free movement of particles.