Technologies dealt with
Ice-boxes have been used for a long time to prevent ice from melting for a longer time than keeping it in open. Aerogel is still an emerging technology (I came across it on YouTube), and is a promising insulator.
I thought that since the inner wall of the ice-box is close to the ice, it would be cooler than the outer wall which would be warmer.
Since there is temperature difference between the two walls, thereby temperature difference between layers of air, shouldn't there be convection currents?
But then, I also think that the space is pretty crammed, I mean the one filled by the air, so there wouldn't be “layers” of air, hence no such convection currents which could cause significant loss of heat from the ice box.
P.S. The question does not totally deny that there are absolutely no convection currents, but just some molecules (significantly less compared to the total number of molecules trapped in the ice-box, dunno about the aerogel).
I have no ideas for the aerogel, you know, the pores are small to the molecular level, so I am not sure about it.
Are there convection currents in the ice-box and aerogel, I mean, layers of air moving (for the ice-box), and air molecules changing position or moving through the pores for aerogel when heated form one side?