Preference > thermal > ok Pre-processor >element type > add/edit/delete > add > solid > quad 4 node 55 > ok > close. Pre - processor > material properties> material models > thermal > conductivity > isotropic > KXX = 100 > exit. Pre - processor > modelling > create > area > rectangle > by 2 corners ( enter width =1, enter height =1) > ok. Pre - processor > meshing > size control > manual size > lines > picked lines > (select two lines opposite to each other or parallel to each other) > ok > No of element divisions = 10 > apply > (select remaining two lines of the square which are also parallel to each other) > ok > No of element divisions = 10 > ok. Pre - processor > meshing > mesh > area > free > (select the area) > ok. Pre - processor > loads > analysis type > new analysis > steady state > ok. Pre - pr