Nano-Fluid Heat Transfer Enhancements under Classical Microscopes


A.A. Mohamad
Dept. of Mechanical and Manufacturing Engineering
Schulich School of Engineering, CEERE
The University of Calgary, Calgary, AB, T2N1N4, Canada

Fecha: Lunes 14 de agosto (Entrada libre – Cupo limitado)
Hora: 3:30 a 5:00pm
Lugar: ML-513


The presentation examines a few claims about the merit of using nano-particles to enhance the rate of heat transfer. In the literature, a few mechanisms were put forward to explain the magic of enhancing the rate of heat transfer by many folds compared with a clear fluid by adding a few percentages of nano-particles to the working fluid. The presentation discussed the introduced mechanisms in the light of classical physics of the thermal diffusion and the fluid mechanics. Yet, no one able to break those simple physics; therefore, they should be valid for particles floating in a fluid. Also, we demonstrated the reasons of why the rate of heat transfer decreases by adding nano-particles in a fluid experiencing natural convection. Furthermore, I tried to illustrate that the most of the popular models used to predict the thermal conductivity of nano-fluids can be simply deduced from analysis of the classical thermal resistance concept. Moreover, an explanation is put forward to explain the discrepancies in the published results. 

Prof. Mohamad graduated with B.Sc. and M.Sc. from Baghdad University, College of Engineering with honor, Ph.D. from School of Mechanical Engineering, Purdue University, W. Lafayette, Indiana, USA. Post Doc from the same school. In 1980, Dr. Mohamad was appointed as a Lecturer, Mosul University, Iraq. Since 2000 he is Prof. of thermofluid in Dept. of Mechanical Engineering, University of Calgary, Canada. From 2010 to 2012 he was on sabbatical leave from Univ. of Calgary, he was Acting Dean of Engineering and Prof. of Mechanical Engineering in Alfaisal Univ.  Dr. Mohamad has been invited by many institutes around the world (Poland, France, Germany, China, USA, Canada, Portugal, Morocco, Tunisia, Turkey, Indonesia, and Ecuador) as a keynote speaker, Invited Professor and lecturer. He has been organizing and chaired/co-chaired a few conferences in many countries on transport in porous media and computational fluid dynamic. Dr. Mohamad elected Fellow Member of American Society of Mechanical Engineer (ASME). Scientific Council member of International Centre for Heat and Mass Transfer. He has authored and co-authored more than 240 papers and graduated more than 40 Ph.D. and M.Sc. students. He has been awarded Research Excellence and Graduate Teaching Excellence awards from the University of Calgary, Dept. of Mechanical Engineering, Canada. He is honored by Averroes award for his contribution to the international education.   

His h-factor is 39 (google scholar) and he is the author of the well-received book on Lattice Boltzmann Method, which is translated into Chines and Parisian languages.