This study numerically validates the single-blow method for evaluating heat transfer performance in complex surface geometries. Two types of pin-fin configurations—before and after shape optimization—were tested using both experiments and direct numerical simulations (DNS). Heat transfer coefficients obtained by the single-blow method showed excellent agreement with DNS results at Reynolds number around 350, while some discrepancies are confirmed in a pressure drop. We confirmed the analogy factors evaluated in both simulation and experiment are commonly improved after optimization. The proposed approach enables efficient and non-intrusive thermal assessment of complex geometries, offering a reliable method for design and validation of advanced heat transfer surfaces.
Otani et al. (Wed,) studied this question.