Faculty Picture

Dr. Ranganathan Gopalakrishnan

Assistant Professor

(901) 678-2580
Engineering Science Building 320
Office Hours
Appointment Only

Professional Background:

  • Ph. D., University of Minnesota – Twin Cities, Minneapolis, MN, U. S. A. August 2013.
  • Bachelor of Technology (Mechanical Engineering), National Institute of Technology, Tiruchirappalli, India.  May 2008.

Scholarly Interests:

Our research focuses on applying aerosol science and technology to Additive Manufacturing (AM) processes as well as fundamental aspects of aerosol science. In our group, we do broadly two types of research:

  1. Aerosol Spray Coating Processes for low-cost processing of coatings of diverse materials for renewable energy, biomedical and defense applications.                              
  2. Precision Deposition of Nanoparticles for template-free, etch-free fabrication of next generation electronic and plasmonic devices.

By applying basic principles of aerosol particle motion, we pursue a "table-top" approach to engineering wherein we develop models validated by rigorous experimental testing to advance aerosol-based AM. We also work on fundamental problems in aerosol science to understand the transport and dynamics of particles and to exploit them for manufacturing applications. We make extensive use of Computational Fluid Dynamics (CFD), Molecular Dynamics (MD), Brownian Dynamics (BD), Monte Carlo (MC) simulation methods modeling aerosol dynamics. These simulations are used to guide our experiment design and validation. Our lab is equipped with state of the art aerosol measurement facilities that includes:

  • several designs of Differential Mobility Analyzers ("long" and "nano") for real-time sizing of 1.9 nm to 500 nm aerosols    
  • Condensation Particle Counters (TSI 3760 and Kanomax FMT 3650) capable of counting individual particles down to 10 nm and 1.9 nm respectively                             
  • Optical Particle Sizer (TSI 3330) that is capable of real time monitoring of 0.3 to 10 mm particles in air.

We have a well-stocked lab space (700 sq. ft.) with an internal network for standardized, particle-free compressed air for particle research (Quincy QOF3), chemical fume hood, several high-precision translation stages for manufacturing research, aerosol generation apparatus such as electro-hydrodynamic (EHD) spray units, powder dispersers, tube furnace, aerosol nebulizers, and necessary safety gear to pursue dry and wet chemistry as part of our aerosol based AM research.

If you would like to know more details about our various projects, feel free to contact me.