High frequency corona discharges, specifically those exceeding 800 kHz, exhibit a vertical orientation similar to a flame influenced by a strong airflow. This phenomenon contrasts with DC and low frequency AC corona behaviors. The vertical alignment is attributed to the acceleration of ions and electrons by the electric field, which also results in heating and contributes to power loss in transmission lines. The complex nature of plasma calculations complicates the understanding of these behaviors, but the movement of ionized gases plays a significant role in the observed dynamics.
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https://en.wikipedia.org/wiki/Corona_discharge#Electrical_wind said:Ionized gases produced in a corona discharge are accelerated by the electric field, producing a movement of gas or electrical wind. The air movement associated with a discharge current of a few hundred microamperes can blow out a small candle flame within about 1 cm of a discharge point. A pinwheel, with radial metal spokes and pointed tips bent to point along the circumference of a circle, can be made to rotate if energized by a corona discharge; the rotation is due to differential electric attraction between the metal spokes and the space chargeshield region that surrounds the tips