Learning Forum

[fabiounterman]

   Hello! I'm trying to analyse the average temperature of the air in the outlet of 9 cylinders tubes filled with a phase change material (PCM) on it's melting temperature.

I'm considering a transient  k-epsilon (enhanced wall treatment) with solidification/melting mode on. The conditions are: 

Air Inlet:  8m/s and 450 K

PCM (T solidus = 494K and T liquidus = 511 K): 520 K 

Steel Cylinder: 520 K

The problem is that my results seem incorrects! I don't know how to set my model to see a decreasing of the PCM temperature (and liquid phase)  ir order to increase the outlet gas temperature. Can someone help me? Thanks!!   

 

 

 

[Rob]

If you set a value that's what Fluent will use throughout the calculation. What you need to do is Patch the PCM temperature: it's done just after you initialise the model. Also, think carefully about your initial conditions as they influence the transient solution. 

[fabiounterman]

Thank you! I'll try this and review my initial conditions.