Fluid Mechanics Lesson 01A: Introduction

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  • Опубліковано 12 січ 2025

КОМЕНТАРІ • 113

  • @Ryan-dk7mm
    @Ryan-dk7mm 26 днів тому +6

    I am very grateful to live at a time when content by such a brilliant professor is free and readily accessible. Thanks Prof Cimbala!

    • @johncimbala
      @johncimbala  26 днів тому +1

      Glad you found my videos helpful. Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are over 500 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @Ryan-dk7mm
      @Ryan-dk7mm 25 днів тому +2

      ​@johncimbala I'm making sure everyone I know (who likes math) knows about this. Looking forward to watching your Bible series also. Many thanks.

  • @MigraineBuddy420
    @MigraineBuddy420 2 місяці тому +4

    You're the goat, man absolute legend to have the guy that co-wrote one of the best textbooks on the topic making free and accessible course material online.

    • @johncimbala
      @johncimbala  2 місяці тому +1

      As they say ... "I stand on the shoulders of giants." Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are over 500 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @MigraineBuddy420
      @MigraineBuddy420 2 місяці тому +1

      @johncimbala I'm a great admirer of your work, cheers from turkey.

  • @markbrightwell3536
    @markbrightwell3536 4 місяці тому +2

    This series of instructional videos is of super high quality, replete with scientific and engineering insight, and dense with worked examples. (I watched every video in the series in its entirety.)

    • @johncimbala
      @johncimbala  4 місяці тому

      Thank you for your kind and detailed comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 480 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @johncimbala
      @johncimbala  4 місяці тому

      By the way, I just added another one (Lesson 15H) a few minutes ago! See
      ua-cam.com/video/T80LlZ5rmsM/v-deo.html
      This is probably my final video lesson in this series.

  • @pomegranaterasberry6180
    @pomegranaterasberry6180 Рік тому +1

    I am absolutely ecstatic to have stumbled upon your videos today! I've been using your amazing book for so many years to learn and teach fluid mechanics to my students! Prof, thank you so much for the video! I'm beyond thrilled!

    • @johncimbala
      @johncimbala  Рік тому +2

      Thank you for your kind comment. Please tell your students about my videos - they can be used as supplements for the book and course. Also, please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @samuelalvesfreitas2149
    @samuelalvesfreitas2149 Рік тому +2

    Thanks professor.
    Hugs from Brazil.
    I will present this channel to my students.
    Thanks for all

    • @johncimbala
      @johncimbala  9 місяців тому

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @abdallaelshennawi4767
    @abdallaelshennawi4767 Рік тому +1

    thank you so much Dr , I study your material from egypt and you are one of the best . thank you

    • @johncimbala
      @johncimbala  Рік тому +1

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @Volkevism
    @Volkevism 7 місяців тому +2

    Thank you very much sir I find your explanations much more easier to understand compared to other courses here in youtube. In God we trust.

    • @johncimbala
      @johncimbala  7 місяців тому +1

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 460 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @raymundoloera
    @raymundoloera 7 місяців тому +4

    Professor Cimbala I just found your channel and love your textbook this is ideal because I was planning to review fluid mechanics all summer thanks !! God Bless you

    • @johncimbala
      @johncimbala  7 місяців тому +1

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 470 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @BladesAnglin
    @BladesAnglin Рік тому +1

    Dr Cimbala, the Cedarville junior mechies sends their greetings and thanks!

    • @johncimbala
      @johncimbala  Рік тому

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @Cidowu
    @Cidowu 8 місяців тому +2

    Thank you for such a great course Professor. God bless you.

    • @johncimbala
      @johncimbala  8 місяців тому

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @Cidowu
      @Cidowu 8 місяців тому +2

      @@johncimbala I definitely will. I actually discovered your channel because I wanted a refresher on fluid mechanics. I am interested in CO2 storage, and understanding fluid mechanics is important to my research interests.

  • @atillaus9168
    @atillaus9168 Рік тому +2

    it is great to hear and see fluid mechanics legend here

    • @johncimbala
      @johncimbala  Рік тому

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @abhiraj4863
    @abhiraj4863 Рік тому +2

    Thank you for the simple explanation. Appreciate the effort 🙏👌

    • @johncimbala
      @johncimbala  Рік тому

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel so that others are aware of this free resource.

  • @Afra-xd5mf
    @Afra-xd5mf 3 місяці тому +3

    you are a life saver

    • @johncimbala
      @johncimbala  3 місяці тому +1

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are 500 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @KennyGuyte
    @KennyGuyte 8 місяців тому +1

    Great refresher 🙏🏾💪🏾✊🏾

    • @johncimbala
      @johncimbala  8 місяців тому +1

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @Pakhavar
    @Pakhavar 9 місяців тому +2

    I got the idea today of what is a continuous deformation. But why does it raise to the need of dx/dt over dy instead of dx/dy for shear stress? I know we can measure velocity more easily than change in length unlike solid. So, it is for just convenience.

    • @johncimbala
      @johncimbala  9 місяців тому +3

      It is not just for convenience, but it is the definition of rate of shear stress. Watch some of the other videos in this series and this will become more clear to you. Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @Pakhavar
      @Pakhavar 9 місяців тому

      Thank you. Sure I will share the content@@johncimbala

  • @Elias_za
    @Elias_za 2 роки тому +1

    Great videos! hope you keep uploading videos like this

    • @johncimbala
      @johncimbala  2 роки тому +2

      I posted over 60 of them in the series to date! See them all on my UA-cam channel - adding more almost every day.

    • @johncimbala
      @johncimbala  2 роки тому +3

      I finished out the semester with 84 video lessons!

    • @Elias_za
      @Elias_za 2 роки тому +1

      @@johncimbala im gonna watch them all after i finish my semestre (16/diciembre).

    • @johncimbala
      @johncimbala  2 роки тому +2

      @@Elias_za Thanks. And tell your friends about this free resource.

  • @gogim5155
    @gogim5155 9 місяців тому +2

    Hello Prof Cimbala. Which video explains Moody diagrams?

    • @johncimbala
      @johncimbala  9 місяців тому

      Lesson 08E. ua-cam.com/video/QwCXUQyompQ/v-deo.html

    • @johncimbala
      @johncimbala  9 місяців тому

      Thank you for your comment. Please tell your students about my videos - they can be used as supplements for the book and course. Also, please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @shane3800
    @shane3800 9 місяців тому +1

    Hello, do you have any surface integration and/or divergence theorem lectures?

    • @johncimbala
      @johncimbala  9 місяців тому

      I do, but mostly in my graduate fluids series. In particular, Lesson 02A at
      ua-cam.com/video/mKmuD1PudsE/v-deo.html
      The graduate series uses tensor notation with which most undergraduate students are not familiar. The whole first week of that series is devoted to tensor notation, which we then use throughout the course.
      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @rosemaryidoko5695
    @rosemaryidoko5695 Рік тому +4

    What is the difference between constant velocity and terminal velocity

    • @johncimbala
      @johncimbala  Рік тому +3

      Constant velocity simply means that an object is moving at constant speed and direction, like when you drive with cruise control on a level highway. Terminal velocity refers to the same concept (constant speed and direction) but when an object is FALLING. Terminal speed (or terminal velocity) is when the weight of the object exactly balances the drag on the object, so that there is no net force; thus, constant velocity.

  • @zeinabhara8748
    @zeinabhara8748 2 роки тому +2

    I am teaching fluid mechanics using your textbook, these videos are such an asset to the course :) I am wondering if there is access to the notes you used

    • @johncimbala
      @johncimbala  2 роки тому

      Yes, click on "About" for any of the videos in the series and you will see a link to an Excel file that contains all the annotated notes I generated while creating the videos. Please let me know if you are able to download it successfully.

    • @johncimbala
      @johncimbala  2 роки тому

      Also, thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel so that others are aware of this free resource.

    • @zeinabhara8748
      @zeinabhara8748 Рік тому +1

      @@johncimbala Yes I downloaded them and got access to the equation sheet. Thank you! I informed my colleagues of your channel, and my students found it helpful too. Beautiful work John. I am so happy I chose your book this semester and found these resources (and it was by such a coincidence! I was googling how to pronounce Cimbala and found the channel!!)

  • @vicentealvarado5608
    @vicentealvarado5608 4 місяці тому +1

    You are one cool and generous hooman being

  • @saram6071
    @saram6071 11 місяців тому +2

    I’m starting to study fluid mechanics from your videos and I have a question, is there examples on every topic? Like problems that would be in a midterm. Thank you

    • @johncimbala
      @johncimbala  10 місяців тому +1

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @saram6071
      @saram6071 10 місяців тому

      @@johncimbalaindeed, but you haven’t answered my question

    • @johncimbala
      @johncimbala  10 місяців тому +1

      @@saram6071 I did answer it, but it seems to not be showing up. I had said that, yes, there is an example problem in nearly every lesson video except for a few that are derivations. All the best with your course and sorry for the mixup.

    • @saram6071
      @saram6071 10 місяців тому +2

      @@johncimbalaThank you very much 🫡

  • @rosemaryidoko5695
    @rosemaryidoko5695 Рік тому +1

    Please I need your help in solving this question: A board 1 m by 1 m that weighs 25 N slides down an inclined ramp (slope 20°) with a constant velocity of 2.0 cm/s. The board is separated from the ramp by a thin film of oil with a viscosity of 0.05 N.s/m2 and pace of 0.117m between the board and
    the ramp. Calculate the terminal velocity.
    Thank you

    • @johncimbala
      @johncimbala  Рік тому +1

      Here you go. ua-cam.com/video/8Ai59wQcyOk/v-deo.html

    • @rosemaryidoko5695
      @rosemaryidoko5695 Рік тому +1

      @@johncimbala
      Thank you professor. I have watched it but the video didn't calculate for terminal velocity.
      The question above provided us with constant velocity and we are required to calculate the terminal velocity.
      Kindly check through professor

    • @johncimbala
      @johncimbala  Рік тому

      @@rosemaryidoko5695 The terminal velocity and the constant velocity are the same here since, as I defined, the object is falling by gravity (weight) alone until the speed is constant since all forces balance.

  • @frankiefresh79
    @frankiefresh79 9 місяців тому

    Hello Prof Cimbala, Can you explain heat transport in fluids. Based on 2-box model of Stommel , but with ice in the Polar box and a tap in the deep flow pipe line. And what will happen to the temperature of the surface when it has a constant energy input (like the sun ) and you close the tap gradually . With ice in the polar box you have to deal with latent heat cooling, . Do we need to apply superposition principle in this flow ?

    • @johncimbala
      @johncimbala  9 місяців тому +1

      Too specific of a project to comment on.

    • @frankiefresh79
      @frankiefresh79 9 місяців тому

      @@johncimbala I had a vision in 2017 and I have to figure out there is a huge error in our climate models. Climate scientists are struggling, but I think if we understand my question we can explain what is going on in the Atlantic ocean. I'm that specific because I think I almost found the error. 🤷

  • @vicentealvarado5608
    @vicentealvarado5608 4 місяці тому +2

    I love this course

    • @vicentealvarado5608
      @vicentealvarado5608 4 місяці тому +1

      AND you do other courses including The Holy Bible and example exercises with funny characters!?!? Haha you have an awesome channel, thanks

    • @johncimbala
      @johncimbala  4 місяці тому +2

      Thank you for your kind comment. Please tell your friends and colleagues about my UA-cam channel where there are almost 500 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @vicentealvarado5608
      @vicentealvarado5608 4 місяці тому +1

      @@johncimbala Will do professor! Which do you recommend the most? Which are you most passionate about?

    • @johncimbala
      @johncimbala  4 місяці тому +1

      @@vicentealvarado5608 I am most passionate about my Two-Minute Bible Video series. Second is my Two-Minute Fluid Mechanics Video series - both have playlists.

  • @bedoe9684
    @bedoe9684 Рік тому +1

    Thanks for the introductory video, Dr Cimbala. I am a medical student, but deeply interested in various engineering topics. I would like to know, what prerequisites are required to fully grasp the fundementals of fluid mechanics? I have seen the preface on your book "a background of calculus, thermodynamics and engineering mechanics is required." Could you please elaborate on that?

    • @johncimbala
      @johncimbala  Рік тому

      Not sure how to elaborate on that... you need to understand basic thermodynamics (systems, control volumes, conservation of mass and energy, etc.). You need to know engineering mechanics (free body diagrams, how to sum forces on bodies, etc.). And of course, you need a good math background since we deal with differential equations and especially partial differential equations.

    • @bedoe9684
      @bedoe9684 Рік тому +1

      @@johncimbala fantastic. I've skipped on lots of parts of my physics and mathematics classes in high school, so I wanted to have a solid basis before tackling your course. Thanks a lot for your time. Wishing you lots of blessings

    • @johncimbala
      @johncimbala  Рік тому

      @@bedoe9684 Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @hishamsalameh5750
    @hishamsalameh5750 Рік тому +1

    Thanks a lot, professor
    But, what is the difference between this course and the engineering fluid mechanics?

    • @johncimbala
      @johncimbala  Рік тому +1

      I am not sure what you are asking. These are the lesson videos for my junior level fluid mechanics course at Penn State. They span material for the entire three-credit course and are based on my fluid mechanics textbook.

  • @ali.europe
    @ali.europe 2 роки тому +1

    The concluding part is quite adequate.

  • @gogim5155
    @gogim5155 Рік тому +1

    Dear Prof Cimbala. Which video explains Moody's diagrams? Thanks....

    • @johncimbala
      @johncimbala  Рік тому

      Fluid Mechanics Lesson 08E: Major Head Losses, Turbulent
      ua-cam.com/video/QwCXUQyompQ/v-deo.html

    • @johncimbala
      @johncimbala  Рік тому

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @Carmen-nx5bj
    @Carmen-nx5bj Рік тому +1

    Hi Professor, I'm a bit confused so for fluid (at rest) it only can resist normal stress(pressure) but not for sheer stress so it will deform right because it cannot resist the sheer stress. What about for fluid (in motion)? It can have both sheer stress and normal stress (means it can resist both) will it still deform? The fluid deform when it cannot resist stress right?

    • @Carmen-nx5bj
      @Carmen-nx5bj Рік тому

      bcs frm the definition of fluid it says that it's a substance that deforms continuously under application of sheer stress, so if it is at rest, it deforms as it couldn't resist sheer stress.On the other hand fluid in motion can be deformed also due to having sheer and normal stress (can resist both) ?

    • @johncimbala
      @johncimbala  Рік тому +1

      Yes, a fluid in motion deforms, typically continuously. I discuss this in detail in later lessons.

    • @Carmen-nx5bj
      @Carmen-nx5bj Рік тому +1

      @@johncimbala ohh so technically no matter fluid is at rest or in motion, when it is exerted by sheer stress (no matter it can or cannot resist under respective condition), it will still deforms right?

    • @Carmen-nx5bj
      @Carmen-nx5bj Рік тому +1

      @@johncimbala thankyou so much Dr John for your dedication that u put into the videos ,it truly helps a lot along with the book !! Our whole ME department uses your book! LOVE FROM MALAYSIA.. hope u can producing more videos about the mechanical engineering degree😊

    • @johncimbala
      @johncimbala  Рік тому

      @@Carmen-nx5bj Right. Shear stress will always cause motion and deformation of the fluid particles. Fluids at rest cannot REMAIN at rest when subjected to a shear stress.

  • @AJMusicUganda
    @AJMusicUganda 11 місяців тому +1

    very nice lecture

    • @johncimbala
      @johncimbala  11 місяців тому

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @mertcan4957
    @mertcan4957 9 місяців тому +1

    Do you have Fluid Mechanics II videos sir?

    • @johncimbala
      @johncimbala  9 місяців тому +1

      Yes, I have four weeks finished of my Graduate Fluids Lesson Series. I have a UA-cam Playlist for those and am adding to them this semester.

    • @johncimbala
      @johncimbala  9 місяців тому

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 400 free videos about the Bible, fluid mechanics, science, math, statistics, air pollution, and other topics. I would greatly appreciate it.

    • @mertcan4957
      @mertcan4957 9 місяців тому

      @@johncimbala thank sir

  • @kimbap-b2l
    @kimbap-b2l 4 місяці тому +1

    @johncimbala where can i find blank notes pdf

    • @johncimbala
      @johncimbala  4 місяці тому +5

      I do not post those, just the annotated ones. You can find them when you look at the description of any of my videos. They are in an Excel spreadsheet that you can download (free of course).
      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 480 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @kimbap-b2l
    @kimbap-b2l 4 місяці тому

    where can i find blank notes pdf?

  • @delaram8235
    @delaram8235 9 місяців тому

    hello are these lectures based on munson book?

    • @johncimbala
      @johncimbala  9 місяців тому

      No, they are based on my book (Cengel and Cimbala, Fluid Mechanics, McGraw-Hill). The notation is slightly different between the two books, but the content is still relevant for any fluid mechanics book,

  • @madhulathakattunga
    @madhulathakattunga Рік тому +1

    It's same to chemical engineering please sir

    • @johncimbala
      @johncimbala  Рік тому

      I am not sure what you comment means. Fluid mechanics is the same no matter what the application, although some engineers use different terms for some things. ??

    • @madhulathakattunga
      @madhulathakattunga Рік тому

      Sir i mean different branches to different fluid mechanics....

  • @emirhanulas4281
    @emirhanulas4281 Рік тому +1

    thanks sir

    • @johncimbala
      @johncimbala  Рік тому

      You're welcome. Please tell your friends and colleagues about my UA-cam channel so that others are aware of this free resource.

  • @Nirjalaadikari
    @Nirjalaadikari 6 місяців тому +1

    Sir can I get this pdf

    • @johncimbala
      @johncimbala  6 місяців тому +5

      PDF files of all my lesson videos are available for download. See the UA-cam description of the video and click "...more." There is a link to an Excel file that has all of the pdf files for the lessons (plus equation sheets and other resources).
      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are more than 480 free videos about the Bible, fluid mechanics, science, math, Excel, statistics, air pollution, and other topics. I would greatly appreciate it.

  • @ShingShing-c1g
    @ShingShing-c1g Рік тому +1

    thank u sir

    • @johncimbala
      @johncimbala  Рік тому

      Thank your for your comment. Please tell your friends about my UA-cam channel and these free resources.

    • @gmangaming3072
      @gmangaming3072 Рік тому

      what if i dont have any friends
      @@johncimbala

    • @johncimbala
      @johncimbala  Рік тому

      @@gmangaming3072 That would be sad.

  • @Lilmisshotrod1
    @Lilmisshotrod1 Рік тому +2

    Shine On☝️😃🪶

    • @johncimbala
      @johncimbala  Рік тому

      I will take that as a positive comment...

    • @johncimbala
      @johncimbala  Рік тому

      Thank you for your comment. Please tell your friends and colleagues about my UA-cam channel where there are hundreds of free videos about fluid mechanics, science, math, statistics, the Bible, air pollution, and other topics. i would appreciate it.

  • @bhupesh977
    @bhupesh977 Рік тому

    😮❤