ChBE Seminar Series: Dimitrios V. Papavassiliou
Tuesday, April 7, 2015
11:00 a.m.-12:15 p.m.
Room 2108, Chemical and Nuclear Engineering Building
Professor Ganesh Sriram
Heat and Mass Transfer Discoveries Using Computations at Different Scales
Dimitrios V. Papavassiliou
Division of Chemical, Bioengineering and Environmental Transport, NSF; and
C.M. Sliepcevich Professor
School of Chemical, Biological and Materials Engineering
University of Oklahoma
Heat or mass transfer phenomena are mainly the result of microscopic diffusion and convection effects. In this presentation, different applications where the macroscopically observed transport behavior is illuminated by smaller scale effects will be discussed. First is the case of heat transfer without convection. The specific physical problem is that of heat transfer in carbon nano-composites, where it has been found experimentally that the effective thermal conductivity is much lower than what is theoretically expected. The reason is that interfacial resistance to heat transfer (Kapitza resistance) becomes an important factor in the transport of heat. Second is the case of mass transfer in laminar, steady state flow. The physical problem involves flow and transport within the pore space of a porous medium, like sandstone in hydrocarbon reservoirs. Through these case studies, it will be illustrated that a combination of simulations at different scales can lead to insights about the physics of scalar transport.