COMPUTATIONAL FLUID DYNAMICS | CFD BASICS
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- Опубликовано: 23 мар 2019
- In this week’s video, we talk about one of the most discussed topic in Fluid Mechanics i.e. Computational Fluid Mechanics (CFD). CFD is a branch of fluid mechanics that uses computers to simulate fluid flow problems. We talk about the need for CFD and the various steps involved including discretization(meshing), solution and post processing. We also talk about the fifferent forms of the Navier stokes equation that are used to reduce computational effort from direct numerical simulation(DNS), Large eddy simulation(LES), Reynolds Averaged Navier Stokes (RANS)equations.
The tutorial on ANSYS FLUENT will be uploaded soon.
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00:00:00 Introduction
00:00:53 Fluid Dynamics/Mechanics Introduction
00:01:23 Motivation to use CFD
00:02:00 Fundamental Principles of Fluid Dynamics (Conservation of Mass, Momentum and Energy)
00:04:38 Navier-Stokes Equations and Limitation of solving analytically
00:05:49 Solve Navier-Stokes Equations with help of CFD
00:06:30 Discretization
00:07:37 Convert Partial Differential Equations into a System of Linear Algebraic Equations
00:09:24 Solving process
00:09:51 Post-Processing: Visual Inspection, Check on Mass Conservation, Force Inspection etc.
00:10:36 Solving Turbulent Flows: RANS vs LES vs DNS
00:11:38 Reynolds-averaged Navier-Stokes equations (RANS): Time-averaging of Flow Qunatities
00:12:45 Large Eddy Simulation (LES): Modeling of small-scale Eddies, Resolving of large Eddies
00:13:28 Wrap-up
Thanks a ton for making this video! The level of attention to details is unparalleled, feels like I've read an entire book in this 15 minute video. Keep up the good work guys! Your efforts are very much appreciated. Cheers!
You people should be acknowledged for your work by great academicians..keep shining
I can't pass this video just by watching. I both liked and commented. Thanks to two of you👍
1st video on RUclips who removes doubts about CFD kudos to you guys..
Excellent work!!! Not only the fluid flow, your flow of explanation is exceptional...! Cheers both you guys !!!
This is very informative for my final year project, thank you.
Wow I like the video of CFD with simple explanation, may continue with a real simulation as examples. Great
hope u continue the CFD series....very informative and thnks a lot
Found this video very insightful. You guys have explained all the concepts very well. Waiting for the ANSYS video. Please upload it soon guys. Keep up the good work!
Watching you from France. Very instructive ! Thank you :)
Wow, thanks alot sir. You explained the topic so well.
Very Good Brief Introduction for beginner like me. Thank you very much.
Clear understanding...... thank you so much guys 💐💐💐💐💐💐💐💐💐💐💐💐💐
Compliment, very clear without report confusional or wrong info
Really helpful video...Make more videos to explain the integral terms
Hi guys, this video is really informative to clearly understand the overviews of CFD. Randomly i saw this video and very impressive of you guys.. clearly explained how all the things worked out in CFD... keep going
This is really a great video.... I still can't understand why there are only 3k subscribers..
Excellent job guys.👌👌👍
This is a great video with terrific explanantion of the topic!
Great Summary. I hope you guys have better visual aids in explaining those important equations... But this is worth watching and as if the summary of what i learned about CFD in several months..
Beautifully explained. love it.
Superb bro .. u are make this cfd very easy
Good job. Very informative.
Simplest explanation. Thanks
please make a video on basics of fluid dynamics it will be helpful for me . By the way this video is very well explained.
Thank u sir,this vedio helped me a lot
Very very nice video..super 😍
But..i expected more animation it's easy to understand...
Thankyou
Nice explanation all the best
Awesome overview
Superb guys. 🤟😍
very clear, thanks a lot
Very accurately explained
Thanks for making this video.
loved the video
Great job thanks
you're amazing guys
Thanks for this video
Thank you guys, great , looking forward for your next video
Thanks for watching, stay tuned for more!!
beautiful explanation ty alot
please explain this : low pass filter in LES, modelling the reynolds stress means what?
Super bueno, muchas gracias, it means, Very good, thanks from colombia
Whatever the equation and theory it may be it ll b helpful if u explain in detailed form n concepts with practical examples.basics of Ansys is very important to know CFD.so pls try to upload the video lectures accrding to tat.
Its very Nice
Thank You sir
Sir thanks for your efforts to...
but I have a question which is at 12:15 min how I can get their equation RANS?
Where is the ansys demonstration link you spoke about in the video?
Love from Bangladesh 🇧🇩❤️
Good video
Can we apply ns equation for two different domain at a same time in cfd.
Awesome
Brilliant Explanation , you made things easy to understand , great teachers , keep it up & god bless you both !
Super sir
Is there a way to take limits in computer science using the epsilon-delta definition? As in, instead of doing f(x+0.00001) where f(x) is undefined but \lim_{h \to 0} f(x+h) is defined?
Great dears. I hope u will reply my question too.
1. In my CFD analysis, Total pressure is not being equal to static pressure plus dynamic pressure. Where I am wrong?
2. Why velocity profile is near walls.
3. How to display maximum / minimum values of results in graphic display.
Hi,how to find initial conditions and boundary conditions, but I have only Mach number (supersonic velocities), inlet angle and Reynolds number. Thank you.
Good very nice
Great...two gem....But How do I grow up my knowledge in theoretical part ?Any book ? Thanks a lot bhai (for the video )
Thank you for the video. Would I ask a question about meshing? If I want to simulate the gas explosion in the tunnel (but it is simulate by experimental apparatus). What is the appropriate kind of mesh can I use? Thank you, please let me know the answer. Thank you
the shape of experimental apparatus is block with the dimension 25 cm x 19 cm x 164 cm
Thanks guys!
Very useful content, The curve example which was the simplest example to explain discretisation. Please do more videos :-)
Make a video to explain these integral terms
where can i learn more about CFD?
Hii.. I need to know more about the CFD stimulation how can I approach you can u please explain to me
I think convergence should have been included to make it more rounded.
Kindly give videos that should explain works of journals.
nice
👍👍
Спасибо
May I request you sir when one person explain that is better to group because student watch your vedio that is very briefly stable in his mind thank you sir
Make a video suggesting which software should we use for CFD like comsol, ansys, abacus etc
Hey, it really depends on the specific case and the prior experience you have with these software's
How to get Andy's Fluid software
How to get ANSYS FLUENT software
Won't low-pass filtering remove large scales in LES?
In Large Eddy Simulations(LES) the idea is to resolve the large scales and model the small scales. The small scales correspond to higher frequencies, where as large scales correspond to the lower range and hence low pass filtering will allow low frequency(large scales) and attenuate higher frequencies(small scales).
Link: sites.google.com/site/smokeisnojoke/lesrans2.jpg
Hi,
Please send video on turbulent flow modelling. Tx
You can check out this beaituful channel for all the details: ruclips.net/p/PLnJ8lIgfDbkrhQTjGZ_22z7NoktJTrTF1
🙏🙏
How can i understand that how mathematics is working behind a fluid flow i mean i can't imagine this mathematics? What should i do
And thank you for such a wonderful explanation
Myself 25yr old I want to change my path in this career.. Previously was am piping stress engineer..can u explain scope and various platforms of this and one thing is I don't want to doing any course and also getting knowledge from books and videos those enough for beginning
where is the Ansys Fluent tutorial?
it is possible to simulate many different physics aspects in the same simulation?
Like the effect of buoyancy, thermal flow, phase change for parameters that variant with height for example?
Yes, I think there are options to implement the specific conditions on some solvers. But we would suggest you to go through the Software manual to see if it can be implemented.
@@2BrokeScientists thanks, glad you answer. one last question, without knowing nothing of CFD and the basic principles and formulas for the physics involve, how many hours of tutorials and practice are needed to start to understand how operate these complex softwares?
I imagine around 50 to 150 hours?
Or some are quite easy to figure out?
That would depend on what your goal is. If you are just curious to learn what is happening about the flow then you can just follow some online tutorials and implement them but to actually produce results that mean something its better to start from the fundamentals and then build from there. The time for that is highly variable on your pace of learning and how in depth you want to go
Really enjoyed the video and cleared a lot of my doubts..... but the outro volume gave me a heart attack
can u suggest some text books for cfd ?
J.D Anderson, computational fluid dynamics.
Hoffmann, computational fluid dynamics ,with different volumes
I know it's a bit of work. But I would appreciate subtitles
Thanks Jesse for the suggestion, we will try and add it soon!!
Thank you! 😃
interested for the equation
What CFD software is affordable for 2 broke scientists? I assume the $20K software packages are out of reach?
Haha, don't think we have the money to afford any CFD software 😅
Hence the broke scientists 🤣
Use OpenFOAM, it's free,but you need an understanding of C++. In OpenFOAM you will get lots of online support. There's also Salome-CFD. Star CCM+ is GUI based but it is damn expensive.
are you tamil
Hahaha thank you the two broke scientists
Bett