Comprehension of the steady state thermal field present above a heated circular plate was ascertained and used for research insight involving hot surface ignition efforts at ESI.
To better understand the thermal plume conditions, ESI utilized temperature measurements above the hot surface and compared with computational effort to document the existence of different heat transfer regimes.
Temperature measurements indicated the presence of two different heat transfer mechanisms producing very different heating rates. The first zone adjacent to the heated surface displays a rapid removal of thermal energy, characterized by a large linear temperature gradient. Within a short distance the thermal changes are significantly reduced and a relatively uniform temperature is reached as one moves upward, away from the surface into the second zone.