Hello, my name is Cahya. I am new in using ANSYS Fluent.
I have a problem in simulating my case. The case is a heat transfer between hot fluid inside a pipe (water-liquid) and a cold ambient air (air). It seems to be a simple case but until now, I can not simulate it.
I ran it in steady state and activate the gravity, energy, and viscous model. There is an inlet boundary for hot fluid pipe and ambient air, I put different velocity and temperature for each boundary. At first try, it gave me error "floating point". Then I tried changing the solver method. It still gave me the same result.
Eventually, I changed the domain of ambient air from air to water-liquid. Surprisingly the simulation worked. I tried changing the domain of hot fluid from water-liquid to air. Also the simulation worked with this setup. I concluded that the simulation worked when the domain are the same.
Then I did several research to make the simulation work. The simulation of multi-domain worked when:
- Turn off the gravity model
- use coupled solution method, but not converge
- both inlet boundary have the same temperature
I need help from you all.