Affiliation: | a Department of Mathematics, Chalmers University of Technology, S-412 96 Göteborg, Sweden b Thermo and Fluid Dynamics, Chalmers University of Technology, S-412 96 Göteborg, Sweden c Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA d Epsilon HighTech Engineering, Första Långgatan 22, SE-413 28 Göteborg, Sweden |