Mod-22 Lec-22 Fluid Flow Applications Part - I

[@siddhartharaja9413]

The best teacher for mechanics department in india

[@shrikantsharma9913]

Very useful lectures, thanks to Dr. Som

[@ruchanatu1597]

Great teaching skills, Very helpful lectures

[@harindamodara1232]

9:17, 15:20, 24:40 S1-3 > 44:17, 46:03, 47:10 Q1-2 > 48:22, 49:20 New 50:15, 52:40**, **53:05**, **53:25**** distance from eye*, *54:26****

[@manalijadhav4424]

Good lecture Thanks a lot Sir

[@vaibhavvashishth782]

at 29:40, why we take dH/dr = 0 , means why energy is constant along different streamlines?

[@Sumon-r6l]

Because, for irrotational flow, energy is constant throughout the flow field.

[@monishreddy1797]

In seady flow streamlines and pathlines should look the same..and if pathlines are looking like concentric circles going down in z axis.how is continuity between molecules satisfied..Shouldnt those streamlines be helical in shape?

[@himanshu.g345]

Yes your are correct streamlines are helical in 3d. .. They are not concentric circles in 3-d.. But in 2d they seems as circle

[@monishreddy1797]

@@himanshu.g345 but helixes im 2d looks like spirals not circles.. concentric circles are discontinuous function..and spirals are continuous

[@himanshu.g345]

@@monishreddy1797 bolt also have helical thread it dont look like spiral in 2d it look like a circle

[@himanshu.g345]

Helix of decresing dia may look like what you are saying but of constant dia look like a circle

[@himanshu.g345]

Actually free vortex flow happens when there is a sink.. And in this particles move in circle with having a velocity in perpendicular direction.. Which i think so is the defiination of helix..

[@yashchaudhary383]

great lecture

[@shreyanshpagaria8201]

does this lecture helpful for chemical engineering fluid mechanics?

[@bumblebee-ml1xo]

@@bhdjvvhdinshudhbsjsh bro for 3rd sem, civil eng.. is this course cover hole sylbs??

[@cricketsavy8690]

Yes fundamentals remain the same irrespective of the field, just one point to be noted some topics are not of at most interest in the view point of a chemical engineer

[@sahilgajbhiye0656]

ty very much sir

[@moisessena1307]

At 36:30, why did he add the "-g.sin(theta)" therm if the equation on the 5th line is for r direction?

[@moisessena1307]

He explained but I didn't get it

[@RajeshSharma-yz4dh]

@@moisessena1307 gravitational force acts vertically downwards in Y direction only BUT we consider here cylindrical polar coordinate system in which R & THITHA directions. which are inclined to axes (XY). since the gravitational force field acts vertically downwards therefore it is inclined R direction.

[@moisessena1307]

@@RajeshSharma-yz4dh Oh yes. Now I understand. Thank you!

[@bhatiamayank3738]

@@RajeshSharma-yz4dh And why in theta direction equation -gcos(theta) not considered

[@ganeshn3800]

At the time of derivation for energy eq along streamline, we have considered it as a streamline where we never used it while deriving eqn. Why we haven't taken dr there, as we are taking here ? dr is arbitrary in x-y plane so, there ds which we have taken there is also arbitrary na? Anyone pls

[@laxminarayana5900]

Sir used streamline to derive energy equation , if you see the derivation it is derived from Euler's equation along a *stream line* .Sir took ds which is along a *streamline*.

[@savageking3948]

There is a difference In the euler equation for streamline ds was taken along the streamline but in the euler equation we are using is for entire flow field with dr as any arbitrary displacement Sir has already clarified it

[@jitendrasingh-nd7kq]

How did we put Vr=0??

[@MrPetreparker]

Since the flow is "Circular", the only tangential component of the velocity exists. If Vr is not zero the velocity profile will be some sort elliptical or spiral or something else but not circular.

[@ztdep]

very great

[@SourajitandAnsu]

vortex flow

[@milonadhikari1897]

Thank u sir

[@PrashVerse]

43:21

[@mrdbzfann]

Thanks a bunch

[@PrateekSharma016]

vortex flow