The optimal kinematic dynamo driven by steady flows in a sphere

Philip W Livermore1, Long Chen2, Wietze Herreman3, Kuan Li2, Jiawen W. Luo2 and Andy Jackson2, (1)University of Leeds, Leeds, LS2, United Kingdom, (2)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (3)LIMSI, Université Paris Sud, Paris, France