Affiliation: | 1. Institute for Energy Technology, P.O. Box 40, N-2027 Kjeller, Norway;2. University of Oslo, Department of Mathematics, Mechanics Division, P.O. Box 1053 Blindern, N-0316 Oslo, Norway;3. School of Mechanical and Systems Engineering, Stephenson Building, Claremont Road, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom |