Prof. Majid Ghassemi
Prof. Majid Ghassemi
K N Toosi University of Technology, Iran
With the development of micro-mechanical systems, researchers have become interested in concentrating on the small-scale impact on the flow and heat transfer in micro-channels. Reducing the size of channel has led scientists to concentrate on micro-sensor. A micro-channel is required for a gas sensor to guide the gas flow. Metal oxide gas micro- sensors are used to detect gases such as O3, SO2, CO2, NO, NH3, CH4, etc. Metal oxide gas micro-sensors are small in size, cheaper to fabricate and consume little power. The purpose of the presentation is to investigate the effect of micro-channel wall thickness and diameter on gas inlet temperature under the influence of thermal creeping. The governing nonlinear differential equations, mass, momentum, energy, and species, are coupled and solved by a commercial code. The channel is assumed to be two dimensional and the Maxwell slip boundary condition is applied since the Knudsen number is between 0.01 and 0.1. The result shows that as wall thickness increases the gas inlet temperature increases and temperature difference between gas inlet and outlet decreases. On the other hand, as channel diameter decreases the gas inlet temperature increases.
Majid Ghassemi is a Professor of Mechanical Engineering Department at the K. N. Toosi University of Technology; one of the most prestige’s technical university in Tehran, Iran. He is currently a Visiting Professor at the Centre for Hydrogen and Fuel Cell Research at the University of Birmingham. Professor Ghassemi has been endorsed by The Royal Academy of Engineering of the United Kingdom as an Exceptional Talent. United Kingdom selects only a small number of scientists per year from all over the world as an Exceptional Talent. Professor Ghassemi teaches graduate and under graduate courses and conduct research in the area of heat transfer and its application in bio and micro sensors, drug delivery, fuel cells, micro-channels and alternative energy. He has over 20 years of academic and industrial experience and served as the President of the K. N. Toosi University of Technology from 2010 through 2013. Professor Ghassemi has also served in several public and private boards and panels and supervised several undergraduate, masters and PhD students, published several books and many journal and conference papers. He is currently an Editor-in-Chief of the International Journal of Prevention and Treatment and Managing Editor of the American Journal of Mechanical Engineering (AJME) as well as Editorial Board member for many international journals. He also serves as member in several international conferences. Professor Ghassemi received his Ph.D. in Mechanical Engineering from Iowa State University in 1993.