What is one effect of increasing temperature difference in forced convection?

Increasing the temperature difference in forced convection leads to an increased heat transfer rate. This principle is grounded in the fundamental laws of heat transfer, particularly the convective heat transfer equation. As the temperature difference between a surface and the fluid increases, the driving force for heat transfer also increases, allowing more thermal energy to be transferred from the hotter surface to the cooler fluid.

In forced convection, where fluid motion is caused by an external force such as a pump or fan, the heat transfer coefficient often improves with the increased temperature difference. This means that not only does the increased thermal gradient enhance the overall amount of heat transferred, but it can also improve the flow characteristics, allowing for more efficient energy exchange. Thus, the outcome is a higher heat transfer rate, making this choice the correct response to the question.