I'm a chemist and I find this very useful for where I work. I needed a quick reminder in fluid mechanics. its been years since i had a mechanics course
That is from the kinetic theory which describes the behaviour of particles in solid, liquid or gas. In liquids the intermolecular attraction are moderately strong and bonds are continuously breaking and reforming b/w them which allows the liquid particles to flow past each other instead of being held rigidly in position as in for sold particles.
For a Newtonian fluids however, if you alter V (thus dVx/dy) and relate the shear stress to dVx/dy - this relation is linear. I am a great fan of your videos, your didacticts are great, I am teaching Rheology and I sometimes take inspiration from your examples. Thank you so much. Best regards, S.H.
Dear Prof. Ugaz, I do have small comment: you state that for "some" fluids we observe that the velocity profile is linear. This is in fact ture for all fluids, because the shear stress is a constant between the plates, thus the velocity gradient is per definition a constant (take a look at any flow curve - Newtonian or non-Newtonian).
Great job on example of Navier Stokes from a 70 year old practicing mechanical Engineer/physicist who needed a Navier Stokes example. I agree with Karlwojo below-- you go slow but really make sure the student can follow why you're doing what your doing with the math. I'm going to watch the rest of your video's.
Would it be possible for you to show a basic example of how to calculate the forces on each plate, specifically in the case that both plates are moving?
Straight forward explanation. Good pace and time length as well. Your work/effort much appreciated. . . thanks. Wondered if you selected a prefered software to help presentation?
I didn't get the last part, As if by increasing the temperature of gas, viscosity goes down because of increased amount of collisions, But in the case of liquid, though the weak interactions are broken but they are also energized more, and more momentum will be transferred, So why the same thing is different for two cases
I think you're referring to the case where a pump pushes water forward, thus making the parabolic profile. But in this video, the example is "top layer/plate is pushed forward." He also mentions that he is using an approximation where the height is very small
finally, a chemical engineering professor who actually takes the time to teach material in an understandable manner
Lol my transport professor is crazy. Went over this 10x and no one understands truly
@@JDGWI Those types are useless they tried hard to hide their weakness by making it seem very easy and rush through the topics.
Among 100s of videos on viscosity ,finally i found the best one.THANKS A TON Sir.
I spent a semester trying to understand these concepts, but finally it takes 16 min to understand this ..
Thanks a Lotttt
I'm a chemist and I find this very useful for where I work. I needed a quick reminder in fluid mechanics. its been years since i had a mechanics course
That is from the kinetic theory which describes the behaviour of particles in solid, liquid or gas. In liquids the intermolecular attraction are moderately strong and bonds are continuously breaking and reforming b/w them which allows the liquid particles to flow past each other instead of being held rigidly in position as in for sold particles.
For a Newtonian fluids however, if you alter V (thus dVx/dy) and relate the shear stress to dVx/dy - this relation is linear. I am a great fan of your videos, your didacticts are great, I am teaching Rheology and I sometimes take inspiration from your examples. Thank you so much. Best regards, S.H.
Victor Ugaz...Thank you sir - the 'velocity gradient' now makes a lot of sense.
Dear Prof. Ugaz, I do have small comment: you state that for "some" fluids we observe that the velocity profile is linear. This is in fact ture for all fluids, because the shear stress is a constant between the plates, thus the velocity gradient is per definition a constant (take a look at any flow curve - Newtonian or non-Newtonian).
Thank you so much, that's the best lecture of ever. Keep doing this, we all thanks you.
Great job on example of Navier Stokes from a 70 year old practicing mechanical Engineer/physicist who needed a Navier Stokes example. I agree with Karlwojo below-- you go slow but really make sure the student can follow why you're doing what your doing with the math. I'm going to watch the rest of your video's.
thank you sir very well explained. Before I knew velocity as a formula now I understand it
Great explanation...thanks
It's very good for learning.Thank you so much.
Excellent video!!!
Brilliant videos. Kudos!
wow brilliant!!!!! Mechanical engineering student here starting in september :D
U must've graduated by now
@@hasanhalim7772u must’ve graduated by now
Would it be possible for you to show a basic example of how to calculate the forces on each plate, specifically in the case that both plates are moving?
Great explanation ! thanks What kind of stylus/digitizer are you using in order to achieve this optical demonstration?
Straight forward explanation. Good pace and time length as well. Your work/effort much appreciated. . . thanks.
Wondered if you selected a prefered software to help presentation?
My pattern recognition was so high I over compensated for my memory by always recognizing every pattern in every class.
Mannn .....You are a legend
Thank you! explained very well!
11:36 Mentioned Tensors
What if the upper plate is at rest and the lower plate is moving? What would the slope be?
I THINK IT WILL BE THE OPPOSITE IN DIRECTION
I didn't get the last part,
As if by increasing the temperature of gas, viscosity goes down because of increased amount of collisions,
But in the case of liquid, though the weak interactions are broken but they are also energized more, and more momentum will be transferred,
So why the same thing is different for two cases
Thank you sir. U Rock!
such a good lecture
You are very good at teaching. Thank you very much. Signed ; Jonatas Furtado, from Cuiabá city - Brazil.
very nice and informative, please teach how the viscosity of a fluid of 350 cst be brought down to 50 cst.
Hi
Thank you sooooo much you really helped me a lot
thank you for your videos, I appreciate
Great video, thank you!!
ooh thanks guys for that innvation
I have come a long ways in 11 days.
The velocity profile on Laminar flow is parabolic though, isn't it?
I think you're referring to the case where a pump pushes water forward, thus making the parabolic profile. But in this video, the example is "top layer/plate is pushed forward." He also mentions that he is using an approximation where the height is very small
great job
Sir please time live class ?
this is perfect!
Fantasticabulous!
ChemBE savior!
Excellent
Hey could you try this software? Locate androidcircuitsolver on google
it's a bit strange thinking of liquids as having layers... surely only solids have "layers"
Engine oil use viscosity to grade a lot.
Ocd is a very serious working memory deficit.
Thank you
thanks a lot.
nice...
thanks!
11:30
thank u
Pastor David brown helped me find a friend in christer aakeroy.
Theres a thermal boundary layer surrounding your skin every time you shop for groceries!
Katarina kamenar had anger management issues and the same learning style as me.
Why do you call fluid mechanics chemical engineering?
I can't even believe what I commented 11 days ago!
So I'd ace the exam and not remember it later that day.
My works were evil because I understood not.
I brought forth evil fruit.
The Bible kept people alive for ten thousand years so i will pray for adult children Paul and christer.
The Bible talks about children in christ and that's what dmitri is to me.
first comment !!
Christer aakeroy paid me ten thousand dollars and I was filled with hate because I was ignorant.
great job