14-02-2013, 11:41 AM
LOW TEMPERATURE MODEL
LOW TEMPERATURE.pptx (Size: 44.4 KB / Downloads: 21)
Volume processes are significant.
Two fluids enmeshed in each other- electrons and heavy particles.
Uniform increase in Te of 20% is enough.
ENERGY LOSS MECHANISM
If volume processes are significant i.e. if diffusion and heat conduction to a wall are included, then electron lose energy only by collision.
Radiation loss R(watt/cm2) = (nsno/cb)1/2 small
C is a function of Te .
Energy transfer for electron heavy particle collision
Energy input mechanism
Joule heating –
E-m radiation
Slow recombination during an expansion through a nozzle on duct
Electron beams fission fragment etc.
Chemi ionization