Hi everyone
I am trying to model corona discharge with a geometry consisted of one anode wire and two cathode cylinders in COMSOL, and I have faced a problem.
the electric current that I compute by integrating current density over anode's surface, doesn't match with the current measured by
experiment; But the thrust value is correct and close to experimental values.
I have used "laminar flow", "general form pde" and "electrostatics" modules.
So can anyone tell me how to measure electric current? is there any module or boundary conditions I should add? or should I compute it with a formula?
when a high voltage is applied to electrodes immersed in air and provides a strongly non-uniform electric field, charged species such as free electrons and positive and negative ions can be created in gas due to corona discharge. Charged species will drift in the field from one electrode to another and eventually will be collected on dielectric surfaces if solid insulating elements are present in the discharge volume.the experimental results obtained for the case of coronas with dielectric barrier are analyzed by means of computer simulations. A model was developed that couples partial differential equations describing drift and diffusion of charged species with Poisson’s equation for computing space charge controlled electric field.
hi;
you can find some help in this paper :
https://www.sciencedirect.com/science/article/abs/pii/S030438861630050X
- Badges
- Science topic