Satish Kumar
Assistant Professor
Education
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Ph.D., ME, Purdue University, 2007
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M.S., ECE, Purdue University, 2007
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M.S., ME, Louisiana State University, 2003
- B.Tech., ME, Indian Institute of Technology, Guwahati, 2001
Research Areas and Descriptors
- Heat Transfer and Fluid Mechanics: micro-nano heat transfer, electro-thermal transport, nanoscale materials and devices, computational fluid dynamics, bio-fluids, and electronics cooling.
Background
Dr. Kumar will come to Georgia Tech in spring 2009. Prior, he worked at the Systems and Technology Group at IBM in Austin, Texas on thermal modeling and design of high-performance computing systems.
Research
Dr. Kumar research interests are in the development and validation of the first principles models for micro/nano scale electro-thermal transport and their applications in emerging devices, such as nanotube/ nanowire based devices, thermal management of electronic systems and heat/mass transfer analysis in bio-fluidic systems. His research efforts are focused on developing computational models to analyze transport in nanostructures and the electronic devices based on those structures.
Temperature distribution in a 3-D nanotube network. |
In this work, an analytical and numerical framework has been developed which helps in understanding, controlling and designing nanowire and nanotube composites suitable for thin film transistors for various macro-electronic applications. This work is based on the physics of electron transport, thermal transport and heterogeneous percolation theory. The developed models are used to analyze the conductive properties of nanotube network and its composites and also for the analysis of coupled electrical and thermal performance of nanotube-network transistors. The nano-scale contact physics between nanotubes is explored using sub-continuum simulations. The contact thermal resistance and the energy transfer mechanisms at tube-tube interface are studied using molecular dynamics and wavelet theory.
In addition, Dr. Kumar's research also focuses on the development of 3D computational models to analyze buoyancy driven ocular fluid flow mechanisms and to investigate the effect of different surgical procedures on ocular fluid patterns and intraocular pressure. This work helps in understanding of the deposition of various particles (pigmentary cells, leukocytes, etc.) on ocular tissues and formation of cellular structures inside human/rabbit eye which has been qualitatively compared with clinical images.
In the future, our research will focus on investigating transport induced by different carriers (electron, phonon, etc.) in emerging devices and different nanostructured materials using multiscale solvers. The goal will be to develop a proper interface for handshaking at different spatial and temporal scales to combine the solvers from atomistic to bulk levels. Our research activities will include the development of models for analyzing and designing nano-materials based architectures for efficient light harvesting and energy conversion. Another concentration of our research program will be on developing compact modeling methodologies to develop a multiscale electro-thermal modeling capability that spans simulations from the device scale to the chip scale and beyond. We will also focus our research on analyzing the physics of small-scale fluids observed in different biological and artificial structures which will help in analyzing different ocular diseases and drug delivery.
The nature of our research is both applied and fundamental which involve various disciplines including thermal sciences, fluids sciences and semiconductor device physics. Students involved in this research work will also take courses in electrical engineering and physics department and perform computational/ experimental work, which will prepare them for a successful career in both academia and industry.
Distinctions
- Purdue Research Foundation Fellowship, 2005-2006
Representative Publications
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S. Kumar, J. Y. Murthy, and M. A. Alam, 2005. Percolating Conduction in Finite Nanotube Networks. Physical Review Letters 95, 066802.
S. Kumar, S., and J. Y. Murthy, 2005. A Numerical Technique for Computing Effective Thermal Conductivity of Fluid-Particle Mixtures. Numerical Heat Transfer B 47, 552-572.
S. Kumar, J. Y. Murthy, and M. A. Alam, 2006. Performance of Carbon Nanotube-Dispersed Thin-Film Transistors. Applied Physics Letters 89, 143501.
S. Kumar, M. A. Alam, and J. Y. Murthy. 2007. Computational Model for Transport in Nanotube Based Composite with Applications to Flexible Electronics. Journal of Heat Transfer 129, 500-508.
S. Kumar, and S. Acharya, 2007. Deposition of Particles on Ocular Tissues and the Formation of Krukenberg Spindle, Hyphema and Hypopyon. ASME Journal of Biomechanical Engineering 129, 174-186.
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