School of Engineering Department of Mechanical and Aerospace Engineering 193 Design of Metamaterials Using Machine Learning-Based Generative Models Supervisor: YE Wenjing / MAE Student: BEHL Gurutva / MECH Course: UROP 1100, Spring UROP 2100, Summer This UROP2100 project explores the application of GANs to generate 3D models of metamaterials, specifically the WGAN-GP. Building on a previous DCGAN model, a dataset of 3,000 voxelized 3D structures representing seven vertical cylinders in a cube was created. The WGAN-GP demonstrated improved stability and accuracy in generating realistic models compared to the DCGAN, successfully capturing key characteristics of the training data. While the WGAN-GP showed promise, further refinements in hyperparameters and dataset diversity are necessary to enhance model performance in future applications, where datasets of real materials are to be implemented. Novel Polymer Nanocomposite for Electric Field-Responsive Solid-State Thermal Switch Supervisor: ZHENG Qiye / MAE Student: XU Chit Kwan David / PHYS-IRE Course: UROP 1000, Summer Liquid Crystals exhibit anisotropies in various physical quantities, ranging from optical, elastic, dielectric, and thermal anisotropies. Due to the comparatively low Fréedericksz transition voltage, we could manipulate the anisotropies as mentioned earlier with relative ease, which in turn stimulates the emergence of various applications based on liquid crystals. Besides the well-known Liquid-Crystal Display (LCD), we also seek paths in using Liquid crystals as a material for optical and thermal switches. Thermal Management of High Power Electronics Supervisor: Simen ZHOU / MAE Student: SAM Siu Chuen / MEGBM Course: UROP 1100, Fall UROP 2100, Summer This study explores the topology optimization of microchannel heat sinks through a two-layer modelling approach. The proposed model enables efficient topology optimization incorporating simplified twodimensional fluid dynamics equations based on a plane flow assumption. To model heat transfer, the thermal-fluid layer and the substrate layer yield two-dimensional governing equations thermally linked via an out-of-plane heat flux term. Using this two-layer model, topology optimizations are performed on a square heat sink. The results are simulated in COMSOL Multiphysics, a popularly used model for fluid heat transfer simulation and optimization.
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