A GPU-DEM Model for Pebble Flow and Heat Transfer Studies in HTGR-Packed Bed

Learn about GPU-accelerated Discrete Element Method (DEM) modeling for pebble flow and heat transfer simulations in high-temperature gas-cooled reactor (HTGR) packed beds in this technical presentation. Explore how the developed GPU-DEM model incorporates grid-based neighbor searching algorithms for particle contact and heat transfer modeling, along with neural networks and empirical fittings for efficient radiation view factor calculations. Discover the implementation of Unified Memory Addressing (UMA) technology for optimized data transmission between host and device, achieving over 200x speedup compared to single-core processing when using single-precision calculations. Examine the model's verification process for particle dynamics and ongoing heat transfer validation, demonstrating its potential for large-scale HTGR simulation applications.