Tem analysis-Joule Heating and Thermal expansion of wire

Tem analysis

Hello,

I was using Joule Heating and Thermal Expansion Analysis of Wire Bond.

Basically, I would like to apply 2.1 Voltage to the wire and see displacement . However, I am not sure that i am on the right truck. My experimental results are somehow different ...like 2 times more displacement ...

Another thing is about reading result..why is the displacement on -y axis looks like downward ? It just does not make sense to me.

Can you please help me about it ?

Best