The oil from the upper collector tube is divided into two internal structures of the actual heat sink.

Analyze the flow and temperature of the heat sink surface. The plate-type heat sink is composed of independent and parallel oil flow channels, and each channel has three connected small channels. The overall length of the sheet is a simplified slice-type heat sink model. The simulated data is exported to obtain a temperature distribution cloud diagram. In the horizontal line, the viscosity increases from the middle to the two sides, and the viscosity in the longitudinal direction increases, which proves that the speed of the oil in the oil passage decreases from the middle to both sides. From the map oil temperature distribution gradually decreases from the middle of the oil channel to both sides, isotherm is a downward convex curve, and in the longitudinal direction, the temperature is gradually decreasing.

Infrared wall temperature analysis. The infrared image of the top surface of the heat sink is taken as the following figure. As can be seen from the figure, the temperature decreases gradually from the top to the bottom, and at the same level, the middle high and low sides tend to be low, but in the middle Below both sides of the oil gallery, this is due to the internal structure of the actual fins, and the oil coming out of the upper collection tube is divided into two, most of which flow into the oil channels on the middle side. The length of each flow path increases from the middle to the two sides, so the resistance increases accordingly, so a temperature cloud appears. It can be seen that the simulation is basically consistent with the experimental results. From the simulation and infrared cloud diagrams, it can be seen that most of the oil flows through the middle oil passage, and the flow rate is fast. Not only the flow on both sides is small, but also the resistance is large and the oil flow rate is slow. Although the heat dissipation capacity on both sides is good, the overall heat dissipation not effectively. The figures and graphs are simulated heat distribution cloud patterns with improved heat sink shape. The improved sheet shape improves the overall oil flow distribution and improves the heat dissipation efficiency. Therefore, appropriately increasing the flow rate on both sides or shortening the length of the oil flow channels on both sides can increase the heat dissipation effect.