Reddit mentions of Fluid Mechanics

If you're looking to get started, you should start with a good book like this one:
http://www.amazon.com/Computational-Fluid-Dynamics-John-Anderson/dp/0070016852

That book starts out with the basics of Fluid Dynamics equations and is really very good.

Turbulence theory and turbulence modeling is a pretty advanced topic. You will first have to learn about laminar boundary layers, boundary layer equations and then about transition to turbulence, turbulent boundary layers and turbulence modeling.

This is the best book I have read on Boundary Layer theory that covers both laminar and turbulent flow:
http://www.amazon.com/gp/aw/d/3540662707/ref=mp_s_a_1_1?qid=1425473580&sr=8-1&keywords=schlicting+boundary+layer&pi=AC_SY200_QL40&dpPl=1&dpID=41ZQZkmQBNL&ref=plSrch

Turbulence modeling is something you can move on to after that. I recommend this book:
http://www.amazon.com/gp/aw/d/1928729088/ref=mp_s_a_1_1?qid=1425473660&sr=8-1&keywords=wilcox+turbulence+modeling

Wilcox goes into much detail about the nature of turbulence and the different methods that have been formulated to model this phenomenon.

Here is a book that talks about the basics of fluid dynamics that is pretty good too:

http://www.amazon.com/gp/aw/d/0123821002/ref=mp_s_a_1_1?qid=1425473759&sr=8-1&keywords=kundu+fluid+mechanics&pi=AC_SY200_QL40&dpPl=1&dpID=41h-Ynv4uGL&ref=plSrch


Another great resource is this set of fluid dynamics videos made a few decades ago. They are awesome and will give you a strong conceptual understanding:
http://web.mit.edu/hml/ncfmf.html

There you go. I'm sorry if I was unclear on anything. Let me know about it and I'll be glad to help you out more.

Now could you point me to some material about how you use hydrodynamics in your field? I love to learn about different fields! Thank you in advance!

There is no 'complete' text book on fluid mechanics; it's a massive area of study, and there are thousands of publications every year that move it forward.

I really think your best bet is to pick up an introductory book and go from there. Different sub fields and specialisms apply different areas of fluid mechanics in different ways. And don't forget that turbulence - which is a massive part of fluid mechanics - is still an unsolved problem. If you then start looking at complex materials like slurries, granular materials, and other 2-phase mixtures then you're getting into realms of really rather extraordinary complexity.

I find this to be a pretty good starting place (although I have the 4th edition - I haven't seen the 5th) : https://www.amazon.co.uk/Fluid-Mechanics-Pijush-K-Kundu/dp/0123821002/ref=sr_1_1?s=books&ie=UTF8&qid=1496312409&sr=1-1&keywords=kundu