“…1 Moreover, the gap flow structure can become even more complex if the gap dimensions are deformed by thermal or mechanical loads. 3,4 A lot of experiments and numerical simulations 1,2,3,4,5,6,7,8,9,10,11 have already been conducted to investigate the flowfield structure on gaps. The majority of these research studies on gaps has gone into considering laminar or turbulent flow over a wide range of Mach numbers in the continuum flow regime.…”