Experimental study of thermal performance of a three-dimensional oscillating heat pipe with Fe3O4 Nanofluid exposed to magnetic field and corrugated evaporator

Use of Oscillating Heat Pipes (OHPs) as a new technology in the heat transfer field has been of interest to different industries in recent years. In this experimental investigation, the thermal performance of a newly designed three-dimensional oscillating heat pipe with Fe3O4 nanofluid exposed to a magnetic field under different input power (0–450W) is investigated. The results showed that the device had a better thermal performance at a filling ratio of 50%. Although the OHP has been applied in many fields, the three-dimensional OHP has not been investigated widely so far. The use of iron oxide nanofluid (Fe3O4) significantly improves the thermal performance of the oscillating heat pipe especially in a filling ratio of 50% compared to pure water. Also, the results show that the use of a corrugated evaporator will increase the heat transfer coefficient. The corrugated evaporator pipes have better thermal performance compared to the simple pipes. Also, when the evaporator is exposed to a constant magnetic field, the thermal performance of the device improves significantly.