“…Carrière and Monkewitz (1999) [16] showed that this pattern is a convective instability of the basic conductive Poiseuille flow. Mergui et al (2011) [17] and Benderradji et al (2008) [18] demonstrated that these rolls are triggered in real channels of finite transverse aspect ratio just downstream the leading edge of the heated plate and near the vertical walls due to the presence of velocity and temperature boundary layers adjacent to these walls. Ra // *=1728.83, B=10 [19] Ra osc *, B→∞ [8] Ra ≈ *, B→∞ [8] Ra ≈ *, B=10 [10] [8,10,19].…”