Presets
Playback
Operating point
Higher voltage and slower gas raise the efficiency; moisture and very high fields push the device toward sparking.
Maintenance
Model checks
The science
What is modelled
Dust in a gas stream is charged by corona ions (field charging, saturating at qs = 3πε0 d2E), then migrates toward the collector plates at the electrical terminal velocity w = q E C / (3πμ d) with a Cunningham slip correction C.
Equations
- Mean field
E = V / (pitch / 2). - Deutsch-Anderson efficiency
η = 1 - exp(-w A / Q), where A/Q is the collecting area per unit gas flow. - A dust layer reduces the effective field until rapping shakes it off.
Honest limits
The particle simulation is a teaching model: it uses a stronger field near the wire and weights by particle mass, so it reads higher than the uniform-field Deutsch law; it has no re-entrainment, back corona or turbulence. Not a design tool.
What to try
- Choose Low voltage: the efficiency drops sharply, since drift velocity grows with the square of the field.
- Choose Fast gas flow: particles have less time to cross the channel and more escape.
- Choose Humid gas near sparking and watch the sparking risk rise as the field approaches breakdown.