Ranga Narayanan
Ph.D., 1978, Illinois Institute of Technology (1981)
Distinguished Professor and Distinguished Teacher-Scholar
Ph : 352-392-9103
404 Chemical Engineering Building
Interfacial instabilities
Transport phenomena with materials science and biomedical applications

Transport of heat and mass and momentum are often accompanied by spatial and temporal pattern formation. Understanding the cause of pattern formation is pivotal as this research has application to the processing of materials on earth and under microgravity conditions.

In the area of instabilities it is the goal of the present research to examine the physics of the spontaneous generation of spatial patterns in processes that involve solidification, electrodeposition and free-surface convection. The pattern formation is associated with instabilities of a parent state as a control parameter is changed. Other processes of interest that involve instabilities are shearing flows with viscous dissipation of heat and oscillatory flows where flow reversal is the cause of non- rectilinear patterns.

The mathematical methods used in our research are related to bifurcation theory, nonlinear energy methods and perturbation techniques. The experimental methods involve flow sensing by infrared imaging, shadow-graphy and electrochemical titration.

Studies are also being conducted in transport phenomena as applied to regenerative life support. In this regard the effect of pulsatile flow on mass transfer is being investigated with the objective of enhancing transport and separation of species. In addition, these studies have application to biomedical fields such as transport in the lungs.

Recent Publications
1. "Spectral Methods in Transport Phenomena", with W. Guo and G. Labrosse, Springer Verlag (2013)
2. E. K Uguz and R. Narayanan, " Instability in Evaporative Binary Mixtures, Part I- The Effect of Solutal Marangoni Convection", Phys Fluids Phys. Fluids 24, p. 094101, (2012)
3 E. K Uguz and R. Narayanan, " Instability in Evaporative Binary Mixtures, Part II- The Effect of Rayleigh Convection", Phys Fluids 24, p 094102 , (2012)
4. W. Batson, F. Zouesthiagh and R. Narayanan, "The Faraday threshold in small cylinders and the sidewall non-ideality", J. Fluid Mech. Vol. 729, pp 496-523, (2013)
5. W. Guo and R. Narayanan, "Interfacial Instability due to Evaporation and Convection-Linear and Nonlinear Analyses", V 650, p. 363-389, J. Fluid Mech. (2010)