Small Grants for Exploratory Research: Skin-Friction Drag in the Turbulent Boundary Layer

在探索性研究小额赠款的支持下， 将进行搜查，以寻找证据， 非常大的雷诺数区域，其中湍流 这些特征不同于低于该制度的特征。 两 现有的边界层湍流测量和新的数据 从大雷诺数充分发展的管流 实验将被建立，将搜索这个证据。 重点是两个被占领政权之间的差异， 非常靠近壁的波动的耦合， 更远的地方 发现湍流特性的变化， 高雷诺数将与普遍持有的观点相矛盾 湍流特性变得更加普遍， 雷诺数增加。 这将影响建筑 预测湍流模型，并提高其准确性， 适用于各种工程系统。

With support from a Small Grant for Exploratory Research, a search will be conducted for evidence that there exists a regime of very large Reynolds numbers in which turbulence characteristics differ from those below this regime. Both existing boundary layer turbulence measurements, and new data from a large Reynolds numbers fully developed pipe flow experiment to be built, will be searched for this evidence. Focus is on differences between the two conjectured regimes in the coupling of fluctuations very near the wall and those further out into the flow. Discovery of changes in turbulence characteristics at very high Reynolds numbers would contradict the commonly held view that turbulence characteristics become more universal as Reynolds number increases. This would impact the construction of predictive turbulence models and improve their accuracy and utility for various engineering systems.