Numerical Simulation Of Electromagnetic Oscillator Heat Dissipation

As the performance of electronic equipment increases rapidly,the electronic heat dissipation will be more important in our life.A new type of cooling device was designed to optimize the air cooling system of desktop computer.A numerical model was built to study the flow and temperature field,by which the optimal design of the cooling device was obtained to enhance the heat dissipation of the computer.A two-dimensional model was built to study the best distance between the two oscillating sheets and the distance between the sheets and the heat sink.The variation of outlet velocity vs.the relative position among the sheets and the heat sink was studied with this model.And the numerical result shows that the outlet velocity increases as the distance between the two sheets increases when the distance is lower than 26 mm.While the outlet velocity stay nearly constant when the distance is higher than 26 mm,which can neglect the change of the outlet velocity as the distance increases.As for the distance between the sheets and the heat sink,the outlet velocity decreases with the increase of the distance.According to the principle of the heat convection,the turbulent intensity increases with higher velocity,which causes stronger heat transfer.With the results of the 2D model,26 mm was chosen as the distance between the two oscillating sheets.As for the distance between the sheets and the heat sink,it should be as small as possible,so a distance of 2mm was considered after the consideration of the practical application.Besides,the cooling device was optimized from the structure of the oscillating sheets and the heat sink to enhance the heat transfer performance by numerical method.The result shows that increasing the size of the leading end has a good effect on enhancing the heat transfer.However,the natural frequency would decrease with increase the of the size,which might make a bad effect on the heat transfer.According to the flow characteristics,the arrangement of fins with different distances is helpful to improve the cooling performance.And the distance of the fins would make a strong effect on the heat transfer.Therefore the optimal scheme to improve the radiation performance of the radiator was studied by simulation.