Nedunchezhian Swaminathan is Professor of Mechanical Engineering at Cambridge University, UK, and Director of Studies and Fellow at Robinson College, Cambridge, UK. He is a Fellow of Combustion Institute since 2018, member of EPSRC College, holds visiting Professorships in many overseas Universities and consults to a number of industries in Transport and Energy sectors. Xue-Song Bai is Professor of Fluid Mechanics at Lund University, Sweden. He is a Fellow of Combustion Institute since 2018. Nils Erland Leinebø Haugen is a Senior Research Scientist at SINTEF Energy Research, Trondheim Norway. Christer Fureby is Professor of Heat Transfer at Lund University, Sweden. He is an associate fellow of the American Institute of Aeronautics and Astronautics, and a member of the Combustion Institute. Geert Brethouwer is a Senior Researcher at FLOW, Department of Engineering Mechanics, KTH Royal Institute of Technology, Stockholm, Sweden.