[qntldoql]

I have read the UDF manual multiple times and also searched the forum, but could not find a solution.

For a 2D domain (rectangular), for each cell inside the domain (away from the walls) I want to obtain the temperature of the bottom wall at their corresponding cell x-location. Is there a way to do this?

What I have currently done is to save the first-layer cell centroid temperature values and the temperature gradients to calculate the wall temperatures. (But for each cell, to obtain appropriate wall temperature, it would have to iterate through all the saved values of wall temperature to obtain correct x-location, thus very time consuming).