Yogesh M. Joshi

Yogesh M. Joshi

Indian Institute of Technology Kanpur

Chemical Engineer
Fellow, Elected 2022

Yogesh M. Joshi received his Bachelor of Engineering in Polymer Engineering from Pune University in 1996 and his Ph.D. in Chemical Engineering from the Indian Institute ofTechnology Bombay in 2001. For his doctoral research he worked with R. A. Mashelkar and Ashish Lele at the National Chemical Laboratory on wall slip. He subsequently did postdoctoral studies at the Benjamin Levich Institute, City College of New York, CUNY, working with Morton M. Denn on the rupture of entangled melts. He joined the Department of Chemical Engineering of the Indian Institute of Technology Kanpur in 2004, where he is currently the Pandit Girish & Sushma Rani Pathak Chair.

Dr. Joshi’s primary rheological work encompasses soft glassy materials, the sol-gel transition, and the phase behavior of colloidal dispersions. By applying effective time translational invariance he extended principles of linear viscoelasticity, including timetemperature and time–stress equivalence, to nonequilibrium soft glassy materials, which are known to undergo time-dependent evolution of their structures and properties. His theoretical and experimental work on soft glassy materials has addressed such phenomena as timedependent yield stress, delayed yielding, delayed solidification, residual stress, and overaging. In his studies of thixotropy he proposed rheological criteria to distinguish thixotropy from viscoelasticity. His work on the sol-gel transition involves understanding the symmetry of rheological property evolution on either side of the critical gel state that is independent of the nature of the system or the driving force for the sol-gel transition. He has done important work on the use of rheological tools to characterize the phase behavior of clay dispersions and associating and block copolymer solutions, specifically regarding the identification of attractive/repulsive glass-like or gel-like microstructures. Dr. Joshi has also studied shear banding, particularly regarding the origin of transient bands in thixotropic and viscoelastic materials.

Dr Joshi is a senior editor of Langmuir, and he serves on the editorial boards of the Journal of Rheology, Rheologica Acta, and Physics of Fluids. His honors include the Shanti Swarup Bhatnagar Award (2015) of the Government of India and election as a Fellow of the Indian National Academy of Engineering (2016) and the National Academy of Sciences, India (2017). He actively consults with industry, including UPL Ltd. and Unilever Inc., regarding improving the flow behavior and rheological stability of their products.

Based on the documents submitted by Morton M. Denn.