I have an object that is cooling down due to heat flux. As I understand it, when only a 2D object is modeled, COMSOL takes a default depth of 1m for proper calculation of ie density and heat flux parameters. However, when I take the same object with the same parameters and material properties, but this time do it in 3D with 1m depth, my time dependent study gives me different (/decreased) temperature changes than in 2D.
What am I missing?