Then Viktor hobbled in, drawn by the commotion. He peered at the simulation. His eyes widened. "No… look, Elara. The interruption shreds the boundary layer just as the local Nusselt number peaks. But if we extend the fin base with your straight profile before the interruption, we pre-cool the metal. The stress doesn't concentrate—it distributes ."
Their heat was already transferred.
Viktor, now limping from a lab accident, stared at his own screen. His louvered, interrupted fins would break the boundary layer—but the thermal stress would warp them into pretzels. They'd fail in hours. Kern Kraus Extended Surface Heat Transfer