Abstract
The adjoint-based shape optimization is applied to a parallel channel with oblique waves, which was found to be quite promising for enhancing heat transfer in single-phase laminar flow with relatively small pressure penalty. It is found that the optimized wall geometry further increases the heat transfer rate by around 8% from that achieved by the existing oblique wave, while the pressure loss is kept unchanged. Meanwhile, the same optimization procedure is also applied to an initially random surface. The resultant optimized surface exhibits a property of oblique waves. This implies that an oblique wavy surface is optimal for achieving dissimilar heat transfer enhancement while suppressing the pressure loss.
