Alwan Hibatullah

Hello, Thanks for reply

Here are the boundary conditions of my simulation

Here I use heat flux as a heat source, and heat transfer from the stator to the fluid domain. so there are three domains from my simulation, namely two solid domains and one fluid domain.
I also use y+ below 1 with a grow rate of 1.1 and a layer of 9. However, the simulation carried out on the cooling system is still not appropriate, and is different from the simulation on the helical coil alone.