Luciano Castillo, the Kenninger Professor of Renewable Energy and Power Systems in Mechanical Engineering, has been elected as a 2019 Fellow of the American Physical Society, recognizing his exceptional contributions to the physics enterprise in physics research, important applications of physics, leadership in or service to physics, or significant contributions to physics education. His citation is for demonstrating the importance of the initial conditions of scaling arguments in turbulent boundary layers, and for demonstrating the importance of turbulence in wind energy, and for mentoring and creating new opportunities for under-represented minorities in fluid dynamics.