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Dr. Ronghui Ma

Associate ProfessorMa_Primary

Department of Mechanical Engineering
University of Maryland, Baltimore County
1000 Hilltop Circle Baltimore, MD 21250

Phone: (410) 455-1965
Office: ENGR215
Email:  roma@umbc.edu

Research Webpage:  http://msmp.umbc.edu/

Education

Ph.D., Mechanical Engineering, Stony Brook University, 2003
M.S., Mechanical Engineering, Southeast University, 1994
B.S., Mechanical Engineering, Zhejiang University, 1991

Employment History

2010-present Associate Professor, Mechanical Engineering, UMBC
2004-2010 Assistant Professor, Mechanical Engineering, UMBC

Research Interest

My research program is focused on solving problems that involve transport of heat, mass, and momentum in a wide range of applications including film growth for energy-efficient electronic devices, novel material processing for photovoltaic applications, and nanomaterials for treatment of cancer. Our recent effort is focused on the behavior of nanofluid transport in porous structure such as tissue and fiber matrix using a multi-scale approach. My team has developed a multi-physics model that considers particle-surface interaction as well as macroscale particle transport in fluid and tissue deformation using finite volume, particle tracking, and meshless methods. We have used this model to study the flow and deposition of nanofluid in tissue during an intratumoral infusion process that involves complex physicochemical processes with large disparity in length and time scales. The multi-scale study has provided valuable information essential for understanding the complex physicochemical processes, enabling us to gain in-depth insight into the behavior of nanoparticle penetration in porous structures that is not obtainable solely through experimental study. This multi-scale approach can be applied to target drug delivery using nanocarriers and nanofabrication with colloidal fluids.

I am also interested in novel material processing for energy-efficient electronic devices and low-cost photovoltaic facilities. My research group has developed models to study fluid flow, heat and mass transfer, phase change, chemical reaction kinetics, and electromagnetic heating involved in Chemical Vapor Deposition, Physical Vapor Transport, Directional Solidification, and Liquid Composite Molding. These models have been used to study the growth of silicon carbide film from vapor phase, solidification of bulk multi-crystalline silicon, and growth of silicon wafer on substrate. Information obtained through the simulations allows material scientists to link growth conditions to growth rate, defect formation, and material properties, and ultimately, lead to improved system design and optimized  processing conditions.

Classes Taught at UMBC

ENES321 Transfer Processes
ENME631 Advanced Conduction and Radiation Heat Transfer
ENME645 Applied Computational Thermal/fluid
ENME816T Transport Phenomena

Selected Publications

Wang R., Ma R., & Dudley M. (2009). Reduction of chemical reaction mechanism for halide-assisted silicon carbide epitaxial film deposition. Industrial & Engineering Chemistry Research, 48, 3860–3866.

Salloum M., Ma R., & Zhu L. (2009). Enhancement in treatment planning for magnetic nanoparticle hyperthermia: Optimization of the heat absorption pattern. International Journal of Hyperthermia, 25(4), 309-321.

Salloum M., Ma R., & Zhu L. (2008). An in-vivo experimental study of temperature elevations in animal tissue during magnetic nanoparticle hyperthermia. International Journal of Hyperthermia, 24(7),  589-601.

Wang R.,  & Ma R. (2008). Reactive flow in halide chemical vapor deposition of silicon carbide epitaxial films. Journal of Thermophysics and Heat Transfer, 22, 555-562.

Salloum M., Ma R., Weeks D., &  Zhu L. (2008). Controlling nanoparticle delivery in hyperthermia for cancer treatment: in vitro experimental study. International Journal of Hyperthermia,  24(4), 337-345.

Wang R., & Ma R. (2008). An integrated model for halide chemical vapor deposition of silicon carbide epitaxial films.Journal of Crystal Growth, 310, 4248-4255.

Wang R., & Ma R. (2007). Kinetics of halide chemical vapor deposition of silicon carbide film. Journal of Crystal Growth, 308, 189–197.

Wu B., Stoddard N., Ma R., & Clark R. (2007). Bulk multicrystalline silicon growth for photovoltaic (PV) application. Journal of Crystal Growth, 310(7), 2178-2184.

Wang R., Ma R., & Zupan M.  (2006). Modeling of chemical vapor deposition of large-area silicon carbide thin film. Crystal Growth & Design, 6, 2592-2597.

Dhanaraj G., Dudley M., Ma R., Zhang H., & Prasad V. (2004). Design and fabrication of physical vapor transport system for the growth of SiC crystals. Review of Scientific Instruments, 75(9), 2843-2847.