ASME Journal of Heat Transfer 1 The Role of Secondary Flows and Separation in Convective Heat Transfer in a Rotating Radial Vane Brake Disc Michael D. Atkins 1 School of Mechanical, Industrial & Aeronautical Engineering, University of the Witwatersrand, Johannesburg, South Africa Michael.Atkins@wits.ac.za Frank W. Kienhöfer School of Mechanical, Industrial & Aeronautical Engineering, University of the Witwatersrand, Johannesburg, South Africa Frank.Kienhofer@wits.ac.za Tian Jian Lu State Key Laboratory of Mechanics and Control of Mechanical Structures, MIIT Key Laboratory of Multifunctional Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, 210016, PR China, and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, PR China tjlu@nuaa.edu.cn Se-Myong Chang Department of Mechanical Engineering, Kunsan National University, Kunsan, Jeollabuk-do 54150, South Korea smchang@kunsan.ac.kr Tongbeum Kim State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, 210016, PR China, and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, PR China tongbeum.kim@nuaa.edu.cn 1 Corresponding author