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Professor Tassos Karayiannis

Howell Building 255



  • PhD Engineering Science, Convective Heat Transfer, The University of Western Ontario, London, Ontario, Canada.
  • BSc (hons) Mechanical Engineering , City University, London, UK.


  • 2020-present Director, Centre for Energy Efficient and Sustainable Technologies, Brunel Univ. London
  • 2018-present Research Group Leader, Two-Phase flow and Heat Transfer, Brunel University London
  • 2017-2020 Research Theme Leader, Energy Efficient and Sustainable Technologies, Brunel Univ. London 
  • 2014-2017 Vice Dean Education, College of Engineering, Design and Physical Sciences, Brunel Univ. London
  • 2005-2014 Deputy Head of School of Engineering and Design, Brunel University London
  • 2004-2005 Head of Department of Engineering Systems, London South Bank University
  • 2001-2003 Head of Division of Environmental and Energy Engineering, London South Bank University
  • 1993-2001 Head of Research, School of Engineering Systems and Design, London South Bank University
  • 1998 Professor of Engineering; 1996 Reader in Mechanical Engineering; 1993 Principal Lecturer (Thermofluids); 1989 Senior Lecturer; 1988 Lecturer, London South Bank University
  • 1994-1996 Honorary Senior Visiting Fellow; 1988-1994 Honorary Visiting Fellow, City University.
  • 1986-1988 British Technology Group Research Fellow, Electrohydrodynamic Enhancement of Boiling and Condensation in Heat Exchangers, City University.
  • 1986 Research Fellow, Cavitation Erosion, University of Southampton.
  • 1981-1986 Teaching Assistant, The University of Western Ontario.




  • Recruitment & Selection – Equal Opportunities, 1993
  • Appraisal Methods, 1994
  • Management Development Programme, 2001-02 (Recruitment, selection and staff development, Managing multiple roles, Staff disciplinary procedures, Financial management, Health and safety, Equal opportunities).
  • Employment Related Policy & Procedures, 2002.
  • Training for Chairs of Examining Boards, 2002, 2003.
  • Leadership Development Programme, 2004.
  • Leadership Programme, Cranfield School of Management, Brunel 2007
  • Research Leadership, Brunel 2007
  • UKVI Training: The Law: Policy, Accountability & Consequences Section, 2015
  • Data Protection, 2015
  • Performance and Development Reviews 2015
  • KTP Supervisors Training Workshop, 2015
  • Resolving Harassment and Bulling, Brunel 2016
  • Workshop & On-line training at Brunel 2019-2020.


  • UK National Heat Transfer Committee 2013 Member and Chair
  • Institute of Energy 2002 Fellow
  • Institution of Mechanical Engineers 1990 Fellow
  • UK Heat Transfer Society 1989 Member
  • UK Heat Exchanger Action Group 1996 Member
  • Member of College of Reviewers, EPSRC 2000- present

Newest selected publications

Werner, TC., Yan, Y., Karayiannis, T., Pickert, V., Wrobel, R. and Law, R. (2023) 'Medium temperature heat pipes – Applications, challenges and future direction'. Applied Thermal Engineering, 236. pp. 1 - 21. ISSN: 1359-4311 Open Access Link

Journal article

Lee, VYS. and Karayiannis, TG. (2023) 'Influence of system pressure on flow boiling in microchannels'. International Journal of Heat and Mass Transfer, 215. pp. 1 - 13. ISSN: 0017-9310 Open Access Link

Journal article

Mahmoud, MM. and Karayiannis, TG. (2023) 'Bubble growth on a smooth metallic surface at atmospheric and sub-atmospheric pressure'. International Journal of Heat and Mass Transfer, 209. pp. 1 - 28. ISSN: 0017-9310 Open Access Link

Journal article

Karayiannis, T. and Mahmoud, MM. (2023) 'Bubble Growth Models in Saturated Pool Boiling of Water on a Smooth Metallic Surface: Assessment and a New Recommendation'. International Journal of Heat and Mass Transfer, 208. pp. 1 - 33. ISSN: 0017-9310 Open Access Link

Journal article

Sahar, AM., Ishak, MSA., Wissink, J., Mahmoud, MM. and Karayiannis, TG. (2023) 'Flow Distribution in Parallel Rectangular Multi Microchannels in Single Phase'. CFD Letters, 15 (1). pp. 67 - 75.Open Access Link

Journal article
More publications(129)