# Heat Expansion of an Aluminium Ring with hole

I have a question of how aluminium will behave when heated ( I made a drawing below to explain the question)

We have a ring of aluminium and a hole (green in drawing), if we heat the ring it will expand.

The outer diameter will expand in the direction of the arrows, the inner diameter will also expand outwards. But what about the hole? Will the expansion of the hole (green) ever meet the expanding inner diameter(red)?

Every linear dimension of the object expands the same way:$$\Delta l=k\times l\times \Delta T$$ Where $\Delta l$ is the change in some linear dimension, $l$ is the original value of the dimension, $k$ is the coefficient of linear thermal expansion for the material in question, and $\Delta T$ is the change in temperature. The choice of Fahrenheit or Celsius scales must be the same for both $k$ and $\Delta T$