Transient thermal analysis is an important procedure to determine the thermal behavior of a system in a specific period of time. In phase transition of molding process or in electronic parts simulations it is essential to consider the timely behavior of temperature changes. Using ANSYS transient thermal module we can evaluate complex systems in a fast and efficient way. In this video tutorial, the molten aluminum is entered into the mold at 800°C while the temperature of the mold is initially at 30°C.