problem description
title="Heat Transfer Sample Problem" nodes=5 elements=4 analysis=static-thermal

nodes
1 	x=0	y=0	constraint=insulated
2	x=2		constraint=free
3	x=2	y=2	
4	x=0		constraint=insulated
5	x=1	y=1	constraint=free

ctg elements
1	nodes=[1,2,5]	material=steel
2	nodes=[1,5,4]
3	nodes=[4,5,3]
4	nodes=[2,3,5]			load=convection

material properties
steel 	Kx=25 Ky=25 t=1

distributed loads
convection	values=(1,20) (2,50)

constraints
insulated	Tx=100
free		Tx=u

end
