Learning Forum

[mdaliahsanshawon]

Hello there, 

I am doing a 3D transient simulation on heat transfer from water to phase change material in shell and tube geometry, my viscous model is standard k-epsilon with enhanced wall treatment. After simulation, it is showing a wall y plus value of 0.068 for PCM and conduction body wall and 16 for water and conduction body wall. I need to know if this is acceptable ot not. I have seen somewhere that eith enhanced wall treatment you have to avoid getting it close to 5. In addition, I have used inflation layers to reduce y+ value. Now I need to know if this is acceptable or not. 

[KM]

It is recommended that the first cell lies in the viscous sublayer with y+ around 1 and that you have at least 5 points within the boundary layer, and we typically recommend SST with automatic wall treatment for such cases.