To predict the dendrite morphology and microstructure evolution in the solidification of molten metal,numerically,lattice Boltzmann method(LBM)-cellular automata(CA)model has been developed by integrating the LBM to s...To predict the dendrite morphology and microstructure evolution in the solidification of molten metal,numerically,lattice Boltzmann method(LBM)-cellular automata(CA)model has been developed by integrating the LBM to solve the mass transport by diffusion and convection during solidification and the CA to determine the phase transformation with respect to the solid fraction based on the local equilibrium theory.It is successfully validated with analytic solutions such as Lipton-Glicksman-Kurz(LGK)model in static melt,and Oseen-Ivantsov solution under the fluid flow conditions in terms of tip radius and velocity of the dendrite growth.The proposed LBM-CA model does not only describe different types of dendrite formations with respect to various solidification conditions such as temperature gradient and growth rate,but also predict the primary dendrite arm spacing(PDAS)and the secondary dendrite arm spacing(SDAS),quantitatively,in directional solidification(DS)experiment with Ni-based superalloy.展开更多
The energy devices for generation,conversion,and storage of electricity are widely used across diverse aspects of human life and various industry.Three-dimensional(3D)printing has emerged as a promising technology for...The energy devices for generation,conversion,and storage of electricity are widely used across diverse aspects of human life and various industry.Three-dimensional(3D)printing has emerged as a promising technology for the fabrication of energy devices due to its unique capability of manufacturing complex shapes across different length scales.3D-printed energy devices can have intricate 3D structures for significant performance enhancement,which are otherwise impossible to achieve through conventional manufacturing methods.Furthermore,recent progress has witnessed that 3D-printed energy devices with micro-lattice structures surpass their bulk counterparts in terms of mechanical properties as well as electrical performances.While existing literature focuses mostly on specific aspects of individual printed energy devices,a brief overview collectively covering the wide landscape of energy applications is lacking.This review provides a concise summary of recent advancements of 3D-printed energy devices.We classify these devices into three functional categories;generation,conversion,and storage of energy,offering insight on the recent progress within each category.Furthermore,current challenges and future prospects associated with 3Dprinted energy devices are discussed,emphasizing their potential to advance sustainable energy solutions.展开更多
基金financially supported by the Ministry of Trade,Industry,and Energy(MOTIE),Korea,under the“Digital manufacturing platform(Digi Ma P)”(reference number N0002598)supervised by the Korea Institute for Advancement of Technology(KIAT)supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(2019R1A2C4070160)。
文摘To predict the dendrite morphology and microstructure evolution in the solidification of molten metal,numerically,lattice Boltzmann method(LBM)-cellular automata(CA)model has been developed by integrating the LBM to solve the mass transport by diffusion and convection during solidification and the CA to determine the phase transformation with respect to the solid fraction based on the local equilibrium theory.It is successfully validated with analytic solutions such as Lipton-Glicksman-Kurz(LGK)model in static melt,and Oseen-Ivantsov solution under the fluid flow conditions in terms of tip radius and velocity of the dendrite growth.The proposed LBM-CA model does not only describe different types of dendrite formations with respect to various solidification conditions such as temperature gradient and growth rate,but also predict the primary dendrite arm spacing(PDAS)and the secondary dendrite arm spacing(SDAS),quantitatively,in directional solidification(DS)experiment with Ni-based superalloy.
基金supported by the New Faculty Startup Fund from Seoul National University.The authors also acknowledge the financial support from the National Research Foundation of Korea(NRF)Grants funded by the Korean Government(MSIT)(2022R1A2C200356612,RS-2023-00218543,and RS-2023-00221987).
文摘The energy devices for generation,conversion,and storage of electricity are widely used across diverse aspects of human life and various industry.Three-dimensional(3D)printing has emerged as a promising technology for the fabrication of energy devices due to its unique capability of manufacturing complex shapes across different length scales.3D-printed energy devices can have intricate 3D structures for significant performance enhancement,which are otherwise impossible to achieve through conventional manufacturing methods.Furthermore,recent progress has witnessed that 3D-printed energy devices with micro-lattice structures surpass their bulk counterparts in terms of mechanical properties as well as electrical performances.While existing literature focuses mostly on specific aspects of individual printed energy devices,a brief overview collectively covering the wide landscape of energy applications is lacking.This review provides a concise summary of recent advancements of 3D-printed energy devices.We classify these devices into three functional categories;generation,conversion,and storage of energy,offering insight on the recent progress within each category.Furthermore,current challenges and future prospects associated with 3Dprinted energy devices are discussed,emphasizing their potential to advance sustainable energy solutions.
