3.3.2 Dissipation effect on the temperature rise

The large velocities of the liquid metal (particularly at the runner) theoretically can increase the liquid metal temperature. To study this phenomenon lets look at the case where all the kinetic energy is transformed into thermal energy.

(3.7)

This equation leads to the definition of Eckert number

(3.8)

When number is very large it means that the dissipation plays a significant role and conversely when number is small the dissipation effects are minimal. Discuss the characteristic of the value to be inserted into equation . Put a footnote about squeeze casting.

to put the explanation about the temperature difference

only regular die casting

continue the discussion here about the squeeze casting? where small change in the temperature create large change in the material properties. And calculate the number and discuss the significance