Hi all! I am currently choosing the topic for my dissertation, and am struggling between heat transfer and fluid dynamics. What would you guys say on these two discisplines? It seems to be that they are quite inter-related, and both of them are quite theoretical and mathematically intensed, which fit my favour... What would you say about the future trend about these fields? and which one's prospect might be better? And what kind of frontier researches are undergoing in these fields? Your help is much appreciated.