Відео

Came for a DWC referesher, left with the urge to listen to Rancid (then watched some of your videos and discovered Dragster). Thank you.

professor can i have your email or contact number wattsapp no

When you are comparing between the full size against the model at the end of the video, where do you get the values for pi1, pi2 and pi4?

LoL

More than perfect, this has been a big issue for me in fluid mechanics until now, thank you very much wishing all the best

Hi thank you, you have saved me

Κανείς για το ΤΟΜ εδώ;

Can you give me book name?

Is it possible to predict long-term stress relaxation of multilayer thermoform polymers (unknown polymer) from short-term data at only three different temperatures?

Hey tnx for your lectures, i was wondering in what program were the drawings made?(i need to work in my chem E license and i need a program)

Dr Bart's lecture videos are an amazing, and I have benefited greatly from them.I hope you could also offer lectures on CFD using the finite volume method.Thank you very much

which software did you use to create the Plot layout , PFD & P&ID

Absolutely amazing video! Really helped me alot! Thank you!

dr. your lectures are great, thank you so much

awesome work sir.

Thanks again for the very nice video. The N1 estimation is just PP geometry I 'd guess?

Awesome video once again! Is there an easy explanation how Trouton viscosity for LDPE is lower? I would assume it's higher due to potential entanglements from the branches.

Very nice lecture. Very good to know practically what you showed in the previous course. 1)About swelling, in a filled polymer: will the filler follow the polymer to the swelled edges? (around 15) 2) In your nice reference, I assume the Wagner is not the onw that Wagner's function is called by right? (around 19:00

Thanks for the nice explanation! Can we have the video you are promoting in a comment or the descriptions to see how this process is done? (I already checked but would be convenient for future viewers)

Very nice lecture

Dr. Bart's Lecture videos are an amazing contribution to those working or studying fluid mechanics - thanks so much

how does the dredger device make sure it does not scoop up electroylte as well, and if so is that an issue. Also the molten sodium does it appear as little sporadic things randomly so wouldnt the dredger need to be moved around so it collects the sodium balls as the appear and disappear in the bath.

You are my fucking hero. Thanks

This video should be moved as the first video of your EPD650 playlist (it's last). Thanks for making this course available for everyone!

Very nice lecture huge! This was the best video regarding TTS i've seen today while searching but it was very hard to find. I highly suggest adding titles of each lecture so people that search similar titles find your videos.

Very nice lecture as usual! If I may ask, it seemed like the solvent's viscosity did not play a role in the fingerprint. I am actually surprised with that as you almost reached 1mPa s in the steady shear part.

Once again a very nice lecture! Are these equations the same if we use oscillatory rheometry? Thanks in advance!

Very nice lesson! If you re not on vacations, allow me to ask: Why we care so much about having the solvent term. n(0) is basically n(polymer) especially in a real example (unless you really work with polymers with n= 50 Pa s. Same for all the terms extracted i.e. λ2 is basically near 0. I understand that we use Giesekus just to get a nice model for our "theoretical" melt/make Maxwell work but does the Giesekus equation really work to model real model real melts (apart from oligomers perhaps?) If yes what do we add experimentally in the solvent term? Thanks again! Really cool lesson!

Dr. Bart we never ran into eachother at the CEB but i enjoy your UA-cam lectures and I hope your time in the states is going well. Cheers

Hi Dr. Bart, thank you for this video - the derivation is easy to absorb. I had a question regarding 8:02 of the video - why are we introducing stress imbalances in the opposite faces of the unit volume? I understood why an imbalance was introduced in your mass continuity derivation video due to mass accumulation in the unit volume or small mass amounts escaping through the other unit volume faces, but since the Cauchy stress tensor is symmetric, how can there be an imbalance?

Great lecture! So this is why for all the previous videos you were writing -(t-t') instead of just t'-t? For the relaxation modulus and the memory function?

Very nice discussion! However, at 8:15 the function exp[ (t-t0/λ ] is not a decaying function for positive t0 and λ. I think it should be t0-t?

Awesome lecture! Some questions in regards to Bagley correction: I guess a is a material property. Any info we could get from that? Can't we have an easier correction without a if we just remove the pressure contribution for L/R=0?. Simply said: ΔP(true)= ΔP(apparent)-ΔP(intercept). I guess there must be something wrong with this as we would not have to repeat for different Qs and it's "too" easy. Once again thanks in advance!

Great lecture! the nice expression at 2:48 is derived from a future lecture (7 part 2) not a previous. Based on that there is a minus missing.

Once again a very nice lecture!~ At 7:30 I think the right part of the u(rc) should also be divided by μΒ?

Thanks for the very nice lecture! For Carreau model don;t we always have λγ>>1 in the power law region of the graph so we can safely assume it? Shouldn't p=n-1/2 in that case? or -p=1=n/2? Thanks in advance!

Great video! Γ at 2:00 should have minus in front just as at 2:56 (the blue)

That is an amazing idea! very clever! thanks for sharing! Can you share the link of the end suggested video for people's convenience? Thanks in advance

Dear Professor, can we expect to receive the first part of the lesson? I am absolutely ecstatic about all the lectures and courses you share with us. Best regards and thank you for your work!

Neat topic for a regular human who uses these products erryday of our lives! I’m gonna go watch ur first episode, and please keep up these

I have seen videos of this derivation before nothing come close to this, simplified to the core. thank you, Dr. Bart,

Great lectures.

Great lesson! coming back to this video, I wanted to comment that it's very strange that the velocity on the wall is 0 but the shear rate on the wall is positive! What is the meaning of the shear rate on the wall if the fluid is "not moving" there?

very nice explanation as usual! This lesson is below part 5 in the playlist (I guess you want it above)

Thanks for the very great lesson. Do you know by any chance where the ρθ part of the stress/shear rate can be found analytically? It's quite hard to prove it for me.

Very helpful. I did the homework and it was impossible unless, I add an extra minus on the ΔP/L, but need to justify physically.

Very useful! Thanks a lot! Any chance you can share the mentioned notes with your YT viewers? Thanks in advance!

Very nice and usefull!

Great video and very helpful!

Very helpful video. It feels so satisfying to get in the conclusion of it!