But for the current study, the complex vortex pattern and its interaction with the boundary layer should be simulated accurately to find the possible vortex breakdown or boundary layer separations inside the duct; therefore, using a less dissipative scheme like the second-order upwind is a requirement.
The passage between ridge and inlet should let the vortex pass away safely, and any vortex breakdown should happen after this passage.
is evident above 2 km AGL, as indicated by the appearance of tightly coupled vortices rotating about the central axis clearly visible between 2 and 4 km AGL.
There are four mechanisms that may result in flame flashback [7, 9-11]; upstream flame propagation of coherent structures and boundary layer flame propagation in particular are symptomatic of combustion induced vortex breakdown
The phenomena are very complex as many physical, time and chemical scales are involved, therefore turbulent combustion instabilities multiscale 4D problems (space and time), like vortex breakdown
and vortex precessing core [3, 4], appear.
Downward moving wind and temperature anomalies associated with rapid vortex breakdown
appear to influence the Jet Streams and project strongly onto the AO.