“…This leads to a strong temperature-velocity coupling, notwithstanding the compressibility effects due to velocity being negligible. Analyses of strongly anisothermal channel flows have been carried out using large-eddy simulations [11,34,35,54,55,56,53,47,48,63,8] and direct numerical simulations (DNS) [44,41,62,3,4,17,19,21]. As the velocity of the fluid is low compared to the speed of sound, the low Mach number equations may be used to relieve the numerical constraints related to acoustic waves.…”