Introduction to Turbulent Flow - Part 2 (Turbulent Velocity Profile)

[@haliltarbak2857]

bro knows what we exactly need, great teacher

[@enochkandiah6445]

Thanks, this was a really good video showing the concepts of turbulent flow.

[@glykerkele6651]

When we calculated pressure drop due to pipe friction in turbulent flow, that friction was in the viscous sub layer or was it in the turbulent outer layer?

[@umerhafeez8424]

how it turbulent shear stress (-row*u*v) positive?

[@tsigeredagetachew9586]

Great video!! Thanks! I couldn't find the link to the other video on turbulence modelling though.

[@mohamedibnali561]

Thank you very much for these two parts

[@adammotycka6237]

Good evening from Czech Republic. First of all, great videos on this topic, both part one and part two. I'm glad I step upon this, I am new to fluid mechanics, my interest is more into the black holes, expansion, cooling of the universe etc. I was just wondering, and I know that this applies only for a gas, fluid or plasma, but when there is a velocity dependance especially close to the wall, how would photons behave, when their speed is constant. It might be a horrible point of view. Or behavior of mass inside of a black hole, does it get imprinted onto the even horizon.. Are galaxies just "eddies" of finite matter into some 4D tube? Are those equations applyable for events in the universe? Stuff like that keeps me awake at night. Thank you once more, I enjoyed it, and it sparked new ideas within me.

[@ademolajayeola9846]

Thanks so much Brother

[@NB-zj4yv]

u' and v' are fluctuating components of velocity, and in the steady flow they are zero while in unsteady they are not zero, laminar flow can be unsteady flow too, so the fluctuating components exist in unsteady laminar flow, is that right?

[@aprendiendoC]

No, in laminar flow there are no fluctuating components. If you have unsteady laminar flow, this would mean that the velocity changes with time. So the speed of a particle changes with time, but not in a rapid fluctuating manner like for turbulent flows