Meshing with Ansys Mechanical APDL

[Usmith]

I am a new user of Ansys Mechanical APDL (or any other FEA software). I am performing a thermal analysis of a concrete block (poured over an old concrete block) for 120 hours after casting. The temperature distribution inside the new concrete block will vary according to the internal heat generation rate, the ambient temperature, and the temperature of the old block at the bottom.

I need to mesh the two blocks in such a way that both blocks have the same nod location at the contact surface (for the cold temperature of the old block to be transferred to the new block). Any ideas on how to do this? How do I mesh the two blocks so that the temperature of the cold block below acts as a thermal load to the new concrete block above? Do element sizes have to be the same at the contact surface? How?

PS: I created the two blocks using the solid block command in Ansys Mechanical APDL.

Thank you very much!

 

[rickfischer51]

Due a nummrg,kp to produce two adjacent block with a common plane. Then simply mesh. If you want to control the mesh on the common plane, mesh it first with an appropriate MESH200 element.

block,0,1,0,1,0,1
block,1,2,0,1,0,1
nummrg,kp

et,99,200,5
asel,s,loc,x,1
esize,.25
amesh,all

allsel
et,1,187
esize,.125
vmesh,1

esize,.5
vmesh,2