Velocity Fields and Streamlines

Organized by textbook: learncheme.com/
Conceptual visualization of velocity fields and how to determine streamline equations given velocity fields. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering.
Check out the Fluid Mechanics playlist here:
• Fluid Dynamics

[@freeye8849]

The first minute of this video is perfect to have a better visualisation of what velocity field is! Thank you

[@savystarot5258]

Loved it ... Finally, I had an idea what does it actually means and how to interpret it ... Thank you so much...

[@Cowboy_Consultants]

thank you. gosh why is it so hard for other profs to explain this

[@Scott21]

You are the best!!!

[@damatrix1001]

Sooo good. Thank You.

[@mechwarreir2]

wtf do you do when the velocity field is in three dimensions? Thats like the very first problem in my fluids II class and im like... we never learned this

[@patrickmomer5130]

The third example does not correspond to an incompressible flow.

[@LearnChemE]

By third example, you mean the determination of the streamlines and drawing them? Does it have to be incompressible flow?

[@patrickmomer5130]

LearnChemE You have the velocit field u=xy and v=2, which is not an incompressible flow (scalar product of nabla and velocity field is not Zero). I solved it with your method and tried it with the streamfunction (Setting the streamfunction equal to an arbitrary constant and plot it). But the streamfunction is not applicable since it is not an incompressible flow. So maybe this velocity field is possible for a gas (which is compressible).

[@LearnChemE]

Patrick Mößmer You are right that it is not incompressible flow. Stream functions work for 2D steady incompressible flow, so using stream functions would be difficult here (and you are right that is isnt applicable here). For simplicity we should have chosen an incompressible 2D flow field. Hopefully the process is still clear.