This study investigates hydromagnetic fourth-grade reactive diffusion. exothermic temperature distribution of the fluid flow and ignition criticality in a channel. This is important to improve the optimal efficiency of engineering devices and industrial machines. The fully exothermic combustible reaction occurs in a Couette medium with molecular diffusion. https://www.spidertattooz.com/Nora-NEFLINTW-R6MPW-6-E-Series-FLIN-Round-LED-Downlight-27K-30K-35K-40K-50K-Selectable-120V/