Numerical studies of Electrohydrodynamic Flow Induced by Corona and Dielectric Barrier Discharges

Publication Year:
2018
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Repository URL:
https://ir.lib.uwo.ca/etd/5203; https://ir.lib.uwo.ca/cgi/viewcontent.cgi?article=7176&context=etd
Author(s):
Shi, Chaoao
Tags:
Corona discharge; dielectric barrier discharge; extended DBD; electrohydrodynamics; numerical simulation; airflow control; Electrical and Electronics; Numerical Analysis and Computation; Plasma and Beam Physics
article description
Electrohyrodynamic (EHD) flow produced by gas discharges allows the control of airflow through electrostatic forces. Various promising applications of EHD can be considered, but this requires a deeper understanding of the physical mechanisms involved.This thesis investigates the EHD flow generated by three forms of gas discharge. First, a multiple pin-plate EHD dryer associated with the positive corona discharge is studied using a stationary model. Second, the dynamics of a dielectric barrier discharge (DBD) plasma actuator is simulated with a time-dependent solver. Third, different configurations of the extended DBD are explored to enhance the EHD flow.The results of the numerical simulations include the discharge current, space and surface charges, velocity profiles, EHD force and efficiency, which have been validated with the experimental data from collaborating researchers and those available in literature. This thesis provides a valuable insight into the physics of the EHD flow induced by gas discharge.