Thermal fluid analysis

①We investigate the cause of the temperature drop in heating　equipment by fluid analysis, to prevent
　 heat loss due to the influence of the outside air and contribute to the energy saving of the heating furnace.

②Flow analysis I: Improvement of the distribution of hot air flow by optimizing the shape (enclosing plate) of the heating area.

③Flow analysis II: Improvement of hot air flow heating efficiency by optimizing the shape of hot air blowing nozzles.

④Improvement analysis of heat transfer efficiency by hot air flow change
The objective of this analysis is to enhance the heat transfer in a stainless steel sphere heated by convection. The sphere is placed in a wind tunel (or convection oven) and the effect of the shape of the tunel walls on the heat transfer in the sphere in studied. The goal is to heat the sphere in the short amount of time thus cutting the energy cost.The sphere is heated for 20 seconds with the air coming from the front at a velocity of 15m/s and at 100℃.We can observe from the graph that the temperature in the center of the sphere for the case with fins on the walls is higher than the one with flat walls.The difference in temperature between the two cases keeps increasing with the heating time. Therefore, we can conclude that the fins on the walls have enhanced the heat transfer in the sphere.

⑤Minimization of pressure drop and temperature deviation in a pipe
The objective of this analysis is to minimize the pressure drop and the temperature deviation between the inlet and the outlet of a pipe. The Adjoint solver was used to generate the optimal shape of the pipe that yields the minimum pressure drop and the minimum temperature deviation.

With the new generated shape we are able to reduce the pressure drop to more than 45%

⑥Analysis of rotational speed and heat transfer efficiency of hot air
The objective of this analysis is to compare the heating time of a cylinder rotating at different speed and find the optimum rotation speed that gives a faster heating time.The cylinder is heated via convection by placing it between two hot air outlets blowing air at 5 m/s and 150℃.After Seveal simulations it was found that the optimum rotation speed that gives the fastest heating time under the mentioned heating conditions is 110RPM.

⑦Analysis of outgassing generated during heat curing process of glue in semiconductor parts
During the curing process of electronic chips a portion of the glue can evaporate when heated and then form a deposit on the surface of the chip when cooled. The purpose of this analysis is to check the efficiency of the Outer gas removal by blowing hot air from the back of the heating chamber.

Three cases were simulated: without blowers, with horizontal blowers and with vertical blowers.

According to the analysis the vertical blower gives the best effect for removing outgassing.

■Analysis to improve blowout flow direction generated by a Sirocco fan

The purpose of this analysis is to improve the flow direction generated by a Sirocco fan.
The Sirocco fan was removed from its casing and simulated in its original state to identify the factors contributing to the flow tilt. Through the analysis, it was determined that the support for the Sirocco fan axis was responsible for the tilting of the flow.
We present three images depicting various scenarios: one with full axis support, an ideal scenario with no axis support, and an improved case where the axis support has been minimized.
The improvements implemented effectively straightened the flow direction, resulting in a significant reduction in pressure drop.

● Analysis using only sirocofan of each structure

①Current shape

②Ideal shape

③Improve shape