Heat transfer, Solid Mechanics and Laminar Flow

Hi all,

What are the required physics to be used when designing a micropump that works using heat?
When the surface is being heated up, the liquid expands and pumps out.
It should be noticed that the micropump will deform also when it is being heated up.

So, what should I use in this case?

- Heat Transfer and Solid Mechanics.
- Heat transfer, Solid Mechanics and Laminar Flow.

Any suggestions?

Best regards,
Marwan