Computational Fluid Dynamics Explained

[@AirShaper]

Are you running CFD simulations yourself? Feel free to share your experiences in the comments - Which software do you use, what do you like about it, what applications to do study, ...?

[@AirShaper]

Hi! Yes, we've developed the entire platform around OpenFOAM - see www.airshaper.com/courses if you want to learn more about running OpenFOAM. One feature in particular is that we do all the meshing automatically for you, even if your 3D CAD model is not watertight! Feel free to check out this video: kzbin.info/www/bejne/Z2Pbcmtmm9R6js0 Unfortunately, I wouldn't know how to help you on Ansys meshing - I haven't worked with that before.

[@wyattb3138]

Does openFOAM use an adaptive mesh?

[@AirShaper]

@@wyattb3138 OpenFOAM features mesh refinement tools, but not a full "adaptive mesh refinement" algorithm out of the box. But it can be done - at AirShaper (www.airshaper.com) we have created a layer on top of OpenFOAM that will refine the mesh during the simulation based on intermediate results!

[@ShaunakDe]

This is one of the best introductions to CFD on KZbin - thanks for putting this out.

[@AirShaper]

Thanks a lot Shaunak! I hope you find the other videos in our channel equally interesting 🙂

[@lemuelrena1793]

Yeahh, thebest vid i watched

[@vishvanthgunasekaran1316]

true!!!!!

[@MyNoNeX]

Saving this one for my university course 1,5 years from now. Nicely explained.

[@AirShaper]

Ah, good luck with the university course then!!

[@justicejudah1247]

Beautiful explanation. Better than all my lecturers combined. I have subscribed.

[@AirShaper]

Thanks a lot Justice!! I hope you'll like our other videos as well :) Talk soon!

[@jake1967]

Crisp and clear👌 Kudos to the effort👍

[@AirShaper]

Thanks Jake!

[@harshithrajamahanti7166]

What a crystal clear explanation i like the way you teach calm &pleasant. Plz make more videos on cfd

[@AirShaper]

Thank you very much for those kind words Harshith, I much appreciate it! If you want, we also have some free course material at www.airshaper.com/courses --> old stuff, but perhaps still useful to learn OpenFOAM?

[@y_social_]

this discipline is just epic

[@AirShaper]

We totally agree :D

[@danielnofal]

Great explanation!

[@AirShaper]

Thanks Dani!

[@olooalfredo]

@AurShaper Amazing explanation! I am using ANSYS workbench for aerodynamic analysis. I am having problems with meshing. Could you create a video on how to solve meshing errors in ANSYS meshing? Thank you.

[@spb1179]

What is the best free CFD software to start with? Which one will be applicable for Aerospace students?

[@AirShaper]

I would recommend xfoil / xflr5 for aerospace students to get started as well as OpenFOAM. You can find some old course material here - www.airshaper.com/courses

[@2Glock30s]

He looks like Jake Gyllenhaal. Also, good video.

[@AirShaper]

Good news, I have a plan B in case AirShaper doesn't work out :):) Glad you liked the video!

[@shawonbhattacharjee5666]

Can't be any better explanation with this simplicity. Hats off!

[@AirShaper]

Thank you very much Shawon!

[@TheOnlyRaceEngineer]

I still wonder why this video hasn't got more than a million views. This video, in any engineer's opinion, is the most important, crucial and essential video. Anyways, I love all your videos. I am working on modeling a personal F1 design and if all goes well, I will try to run those aero simulations in both openFoam and solidworks and would love to share with you soon hopefully.

[@AirShaper]

We would indeed be very happy to see more views - we just haven't figured out how to achieve that. Do you perhaps know anyone with skills in that domain? I'm looking forward to see your design and CFD results!!

[@TheOnlyRaceEngineer]

@@AirShaper Well I don't know anyone specific but there are a lot of famous youtubers you can view to check out the way they present their ideas. One specific guy I like is @chrisFix , who shares great DIY car videos down to the great details. And of course, I will share my design and simulations once they are complete. Looking forward to it.

[@AirShaper]

@@TheOnlyRaceEngineer ok thanks, I'll look into @chrisFix's channel!!

[@osamaahmad6500]

Many thanks 🙏🏼 for this great explanation for the CFD I really appreciate your effort Thank you 🤗

[@AirShaper]

You're very Welcome Osama Ahmad! I hope it helps to to embark on a cool journey involving CFD :)

[@paulfrischknecht3999]

all of this applies to computational electromagnetics as well. except there we are pretty confident that our models, which have been promoted to laws, are correct (at least in vacuum, where we don’t need to model materials...)

[@AirShaper]

Hi Paul, that's interesting - I didn't know the accuracy was so much higher for electromagnetic field simulations!

[@environmentalhealthwatchtv6446]

Hi Dr. Wouter, I will like to learn more about CFD and use it for my project work in school. I'm Bright from Ghana. Thank you for the nice introduction.

[@AirShaper]

I'm glad the video has helped you to learn CFD!!

[@මංජුල]

I hope I have collected much to save from my exam today. Thanks.

[@AirShaper]

Good luck with the exam, Tharanga!

[@bhawanaupadhyay7650]

Thank you so much. You have no idea how good you are and how clearly you have explained. The best introduction ever

[@AirShaper]

Thank you VERY MUCH for the compliment Bhawana - I much appreciate it!

[@artyquantum7283]

Hi, Do you know about Computational Fluid Dynamics (Continuum Mechanics) especially related to motion of bodies submerged in fluids. Basically i am having hard time even visualizing and starting to think about following problem: Consider a rigid body (with a mass "M" and inertia tensor "I") which is completely submerged in a Fluid of constant viscosity "v" and constant density "d" at rest in a container (Boundary value problem). Now consider the fluid is disturbed by some external force "F" at a point "P" inside the container. How to calculate how much of the original force "F" acted upon that RigidBody and what are the components of that force on that rigid body. Can you help ? Thanks.

[@AirShaper]

I've seen some interesting tutorials on this in OpenFOAM, perhaps you can search for those? If you want, we have some old course material available for free at www.airshaper.com/courses Good luck!

[@emekaedward3187]

Very nice

[@AirShaper]

Thanks Emeka!

[@ArjunSingh_11]

Very nicely and simply explained, cheers

[@aldopolgeo73]

An actual example would have been better. This explanation does not suffice.

[@AirShaper]

Dear Aldo, we chose to focus on the theoretical aspects in this video. For practical examples (on Porsches, drones, motorbikes, ...) please do check out the other videos on our channel! kzbin.info Or visit our blog at www.airshaper.com/blog for more practical examples. Hope it helps!

[@aldopolgeo73]

@@AirShaper i understand. I am providing feedback from my point of view.

[@sakthikalaa5711]

You are a saver. Thank you !

[@amannarwal7032]

Very nicely explained

[@AirShaper]

Thanks Aman!

[@learnwithyaqoob]

nice work. I was having some problems but it all clears now

[@AirShaper]

I'm glad the video made things clear for you!

[@foto2548]

I need to find a rear wing for my 2012 Nissan 370Z that has been CFD tested. Anyone have recommendations?

[@AirShaper]

This one looks to be analyzed in CFD: www.aerodesign.com.au/wings/

[@davidandrews2883]

Great teacher. Thanks.

[@AirShaper]

Thanks David!

[@tombuttrick2575]

Why is pressure and velocity important in every cfd simulation?

[@AirShaper]

Hi Tom, pressure and velocity are what define the flow field and thus all the resulting forces, moments, noise, vibrations, ...

[@Anilkumar-fv9zy]

Sir, I have a project on CFD modelling of desilting chamber. So I want ask that which software is good for CFD modelling.

[@AirShaper]

There are countless options: StarCCM, Ansys, ... But if you're looking for an open source option, then I'd certainly recommend OpenFOAM

[@Anilkumar-fv9zy]

@@AirShaper thankyou sir.

[@element6264]

Hey! I'm an undergraduate student and enthusiastic to learn about CFD analysis. Can you tell me if I can do an analysis for drag in Solidworks?

[@AirShaper]

Solidworks indeed has a cfd module, but I'm not sure if it's included in your license. I don't know if it's still the case, but the CFD in solidworks used to be FloEFD of Mentor Graphics (now owned by Siemens). Maybe you can check with IT of your department if you can get the CFD module? If yes, then you can indeed run a drag analysis.

[@element6264]

@@AirShaper thank you for the reply! And what if I want to run it in Ansys? And also, if I want to run a simple analysis of a model, what tests will be good enough?

[@AirShaper]

Ansys is definitely good enough too. It's more a matter of setting all the parameters right. You'll find a lot of resources on www.cfd-online.com for specific case setups!

[@element6264]

Thanks for all the help ❤️ And keep uploading good works like this. There's a lot to learn from you.

[@TheOnlyRaceEngineer]

awesome and concise explanation from start to finish. great video

[@AirShaper]

Thanks Daniyal, I'm really happy to get such nice feedback! I hope you're on a great track to enjoy CFD :)

[@nitinshinde5218]

Excellent Explanation...

[@AirShaper]

Thank you very much!

[@GaiaKnight11]

This is very well explained!

[@AirShaper]

Thanks a lot Julio!

[@stephenlewandowski8316]

nice and easy intro to CFDs at breakfast - really well explained

[@AirShaper]

Thanks a lot Stephen!