Porous Green Gauss Node vs Least Squares Cell
 

Hi,

I had a tube filled with a high quality hex mesh. Flow enters with 860°C and walls have a constant temperature of 70°C. I run it once with the Least Squares Cell based gradient and once with the Green Gauss Node based one. I get at the outlet two different temperatures, 216 for Least Squares and 214 for Green Gauss. I think the result with Least Square Cell based is "correct" but I am not sure as I couldn't find an explanation