Johnselvakumar (John) Lawrence
Bulk Solids Handling Specialist
Ph.D., Agricultural and Biological Engineering, Purdue University
M.S., Agricultural Processing, Tamil Nadu Agricultural University,
B.S., Agricultural Engineering, Tamil Nadu Agricultural University,
Bulk solids handling, material flow in hopper, storage, pneumatic conveying, environmental condition on bulk solids flow, moisture sorption, Discrete Element Method (DEM) and Finite Element Method (FEM) modeling.
Professional Organizations and Affiliations
Professional Engineer (PE)
American Institute of Chemical Engineering (AIChE)
American Society of Agricultural and Biological Engineers (ASABE)
Dr. Lawrence is a bulk solids handling specialist focusing in the areas of hopper/bin design, material flow properties, material quality and processing, pneumatic conveying and modeling. He serves as the research director of KSU Bulk Solids Innovation Center and manages the research, education, training and testing activities of the center. Our research interests are powders and bulk solids flow in bins, hoppers, chute and feeders; pneumatic conveying of powders and bulk solids. More specifically focus on mass flow, funnel flow, segregation, ratholing and arching problems in bulk solids handling and storage; segregation and non-uniformity problems in blending and mixing. Other specialty is bulk flow analysis using Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD). We do research on bulk solid flow problems due to change in weather (temperature and relative humidity) in the factory environment. We study the moisture sorption characteristics of various powders and bulk solids. Research at the innovation center mainly focuses on the process industries of plastics, chemicals, foods and feeds.
Dr. Lawrence formerly served as the lead researcher and director at IntelliFarms, a grain management company in Missouri. There, he established a grain lab and determined the equilibrium moisture content characteristics of various grains and oilseeds. These characteristics are used in their Bin Manager controllers to manage grains. He earned a doctorate in agricultural and biological engineering from Purdue University and did postdoctoral research at the University of Arkansas and at Kansas State University in Manhattan. His research topic was focused computer simulation modelling used for grain storage management. He also developed 3D stored grain ecosystem model using the finite element method. At Purdue University, he was part of the Post-Harvest Education and Research Center (PHERC) where he participated in several post-harvest and grain drying projects.
Dr. Lawrence is associate editor for the ASABE journals. He also serves as program chair for the PRS 702 group Crop & Feed Processing & Storage of ASABE. He has published many articles and presented his research at several scientific and professional conferences.