Fluid Mechanics | Module 5 | Fluid Flow | Free Vortex Flow (Lecture 34)

[@pixbee3759]

I don’t speak Hindi but I managed to partly follow this by following your written work which seemed very clear and informative. Please consider putting in English subtitles as well as I think this lecture should be more popular and accessible. Thank you

[@RameshM-dp5nq]

Yes

[@pradeepkumarverma5226]

Thanks to whole gate academy plus team, I'm really appreciating your efforts for us, but can you provide us whole subjects for us that will be really helpful for us and for those students who can't afford coachings.

[@saurabhdubey7693]

thank you so much sir .....for this lecture ...you are having genius technique of teaching ....anybody can understand any topic from your lecture... clearing the concept with examples.... thanks a lot

[@saqibgill2679]

no words for you appreciation sir.brilliANT brullinat brilliant

[@parthraval3883]

What a Perfect circle @3:21 !!!!!

[@shubhamkhamkar6597]

Thank u very much sir.Very unique and superb teaching style. We are waiting for other mechanical videos.

[@deepankartiwari3747]

Sir thank you so much for these lecture

[@jaypatel7632]

Excellent👍👏😆..

[@Islo_elysium]

such a great lecture, now i could solve my OHT exams ,thank you so much

[@abdulrehmankhan9584]

Very informative video thanks alot.

[@punchthewall9899]

You're doing very good job , but please upload general aptitude videos it's very important for every branch

[@harshitverma3511]

Sir strength of materials k lecture bhi provide krde dijiye. Your lectures of fluid mechanics are excellent. They are really helpful 🤗🤗

[@kanhiyajoshi5346]

Thanku ssooooo.much for ur support sir

[@dubeyd5384]

Bahut achcha explanation

[@vikiisingh1422]

Sir , explain how free vortex is irrotational and forced vice versa???

[@ramnarayan5711]

Sir how can the direction of velocity of stream curves or direction of flow can be determined, does the negative sign in stream curve equation means this that the concentric circles formed due to various values of R should be in clock wise direction which was our assumption?

[@Mahesnayak24]

Please sir provide with examples and concept to remember easily and sir provide more problems of previous year gate question with solution.

[@energyengineer5266]

Is there any difference between Swirl Flow and Free Vortex Flow ?

[@maliwad01]

Thank you sir ❤🙏

[@pawankumar-wy2rt]

Thanks sir

[@dnautiyal9655]

Excellent

[@vaibhavarora4048]

I have a doubt sir. If you are saying the vortex flow is the special case of potential flow and we know potential flow is irrotational but in this session you are saying vortex flow is the motion of rotating fluid so this gives it as a rotational this implies it is not irrotational and hence not potential... ... Resolve my query please!

[@soumyaranjanpanigrahi2813]

Sir please please upload more videos in a day

[@abhijeetsingh9290]

12:45 How can we rotate a system with external torque by having constant angular velocity? It is not possible or is it sir?

[@aravind43]

Centrifugal pump is an example of forced vortex flow, if I am right. So, in there we have constant rpm --> w

[@maminulislam9128]

Thank you so much. please include some reference books with writer.

[@sourabhpborah2182]

In free vortex flow Vr=constant, In the calculation for psi and phi you didnt use Vr= cons, means Does this flow net also valid for Forced Vortex Flow???

[@mvthought_]

Thank you so much sir

[@binodgope2204]

Vortex means fluid with rotation, so how free vortex flow is an irrotational flow?

[@harshareddy3248]

What is the direction of stream line and equi potential line in free vortex flow and forced vortex flow?

[@dhaivatbuch5704]

sir when will you upload the video of electrical engineering module

[@gouravdhiman1894]

Sir som kbb suru kroge .and Thank u sir

[@pratoshkumarjha89]

Please upload videos on electrical module. It's more than a month,not a single video has been uploaded related to Electrical Engineering.

[@artistic-v8411]

Pratosh kumar jha sorry for inconvenience, I will notify you as soon as possible

[@holisticcivil8922]

vortex flow is a type of potential flow but according to potential flow , fluid is irrotational but vortex flow is rotating about an axis . this is contradictory or i am missing the concept

[@AkibJahangirChoudhury]

In a free vortex, the tangential velocity decreases with r (V is inversely proportional to r as Vr=Const) which means there is no rigid body rotation. This velocity profile prevents the formation of local rotation (vorticity). Also you can see from the polar coordinates that U(theta) is inversely proportional to r. So for irrotational flow vorticity=0. So when you find the vorticity in cylindrical coordinates then you find that the vorticity is 0 everywhere except at r=0 where the velocity becomes undefined due to singularity.

[@shiVam01242]

Thanks sir. Sir, *One Doubt* How we got the equation of Circumferential velocity i.e., u= -d(si)/dr = (1/r)× (d(phi)/d(theta)) Please sir, *Do Reply*

[@hmm2928]

he taught that, its from stream functions and potential functions in polar coordinates.

[@AkibJahangirChoudhury]

In lecture 33 of “Source Flow and Sink Flow” sir wrote the stream function and potential function in polar coordinates. From there Sir wrote the equation for circumferential velocity directly. Although Sir hasn’t showed us the derivation for this.

[@RamPraveshchauhan-st5fr]

Sir , are your lactures not binificial for gate point of view

[@mohitpancholicivilservant2833]

jab torque hai to omega constant kaise hai???

[@dhavaldalwadi2126]

Sir in free vortex flow, the stream function is negative. So what will be the effect of that?

[@aditiyapadhihari1052]

It means that the direction of rotation will be opposite to what we have previously assumed it to be

[@ShubhamKumar-fc4po]

savior

[@harshareddy3248]

In free vortex flow why it is irrotational?

[@kirtiravindraveer1822]

Thank sir

[@BSourabhPranBorah]

Sir,Why free vortex flow is irrotational?

[@itsok85]

Sir kuch numericals deal karwa dete......

[@BloodOrchid67]

Sir in free vortex velocity what happened to the velocity with radius. I mean it's(velocity) increase or decrease?

[@yassershaikh9899]

i guess it has to decrease as u can see the equation for a free vortex flow is"V x r=CONSTANT" so if one increases(radius) the other has to decrease(velocity) i feel to maintain a constant

[@aksharma5442]

In forced vortex flow torque is not zero then how can u say omega is const.

[@OnkarShrma]

Bro torque is not zero but it is also constant. The first condition of generation of any vortex flow is constant torque. And in free vortex flow torque also exist but that torque is not external or applied.

[@aksharma5442]

@@OnkarShrma bro if torque is const then we can say angular acc. Is const.then omega must be variable not const..

[@OnkarShrma]

@@aksharma5442 Bro always value of r changes only in vortex flow.

[@mayurbauskar1574]

Hello sir, I have doubt in circulation when we moved in x direction so why we take v+d/dx(v)

[@odetomykitten]

taylor series

[@aditiyapadhihari1052]

Previously he has taught us

[@parthgoswami5738]

Sir dot product scalar formation hota he. Vector component nahi plz correct it

[@nandipatisai]

sir, what is the meaning of v.ds ???

[@lavkumargupta1143]

sir source and sink dono me kis tarh ka flow hoga i mean force/free vortex flow please do reply

[@artistic-v8411]

Lav Kumar Gupta vortex flow and source sink flow are different

[@gautamyadav2785]

Sir ye gate ke liye imp hai kya

[@vivekmittal4497]

please upload lecture 1 of module 5

[@prafullaambastha5759]

VIVEK MITTAL Can u please send me the link of those lectures. I found them missing too😇

[@sandeepkumawat4982]

sir how the stream functions curve is circle?

[@sandeepkumawat4982]

sorry got it..

[@narasimhareddy5124]

@@sandeepkumawat4982 how

[@nandipatisai]

sir, please tell what is the meaning of circulation

[@aditiyapadhihari1052]

The line Integral of velocity of an element of length ds along a closed loop in a conservative vector field is called as Circulation.

[@siddharthsingh2541]

why angular velocity is zero in free vortex flow

[@yassershaikh9899]

The particles only have circulation however, as no external torque is applied upon the particles they do not rotate about their individual axis therefore angular velocity is zero about it

[@PoonamVerma-zk7fs]

Hi

[@mohammadyaseenkhan4858]

Haaan sir

[@vivekmittal4497]

sorry! got it

[@aashishkhandelwal3304]

baat h bande m

[@lookatthisss2]

Ye kon log hai jo dislike karte hai... ya to saale jealous hai, ya unko Hindi aati nahi

[@tinkuji4040]

sir day by day numerical ke number kam hote jaa rhe hai aur gate me only numerical hi aayegi ye sb nh

[@artistic-v8411]

Abishek Kumar jo gate ke relevant topic hai unke numericals karae ka rahe hai... Concept pe focus kiya ja raha hai as numerical ke liye bahut source hai apke pas.

[@artistic-v8411]

Ideal fluid flow university point of view se important hai. Gate me bas theory ata hai is topic se.

[@tinkuji4040]

Er. Venugopal sharma OK sir thik hai smjhe thanks.

[@artistic-v8411]

Numerical ki number badha deta hu abse ohk!!👍

[@mohitpancholicivilservant2833]

are ye log ki equation circle ki kaise ho gyi..? koi reply to kro

[@LIZ-zh4rw]

Function of r

[@shreekantmaurya3866]

Thank you sir

[@rajmalprajapat6724]

Thank you very much sir.

[@shivshankarprajapati5656]

Thanks sir

[@aniketsaw7347]

Thanks sir

[@sadikulalam5944]

Thanks sir