Research on the heat dissipation of high-power LED lights based on COMSOL simulation technology

The heat dissipation issue is a major technical bottleneck restricting the development of high-power LED technologies. To enhance the thermal performance of high-power LEDs, this study establishes a multiphysics model based on COMSOL Multiphysics and conducts simulation analyses of the thermal field under both natural convection and forced convection conditions. The model couples the Heat Transfer in Solid and Fluids as well as the Turbulent Flow, with the Turbulent Flow enabled in the Stationary calculation to improve convergence. Subsequently, in the Time Dependent, the Heat Transfer in Solid and Fluids and the Nonisothermal Flow are introduced, using the Stationary results as the initial condition. The simulation results reveal that airflow velocity plays a critical role in determining the thermal performance of high-power LED cooling systems. As the velocity increases, the time required to reach thermal equilibrium is reduced, and the steady-state temperature decreases accordingly. A comparative analysis of simulation and experimental results under a 2.6 m/s condition shows less than 3% deviation, validating the model's accuracy and reliability. This study offers theoretical insights and computational support for optimizing thermal management structures in high-power LED systems.