[CFD] Pyramids, Prisms & Stair-Stepping

[@nicotrivium]

Dude, you are the CFD GOAT... thanks for everything!!

[@nepali36642]

What an absolute legend! Eventhough, I am not related to this subject, I am just amazed by the flow of information you provide through your videos Here in India, people just shout on their videos and repeat unnecessary things and make learning very stressful. You have just motivated me to do a video series on my subject topics in your style.

[@ConnorSmithBirch]

These sort of videos with knowledge that's only found in people's heads or company notes are the best! Thankyou!

[@sergniko]

Of course we want more of these videos!

[@francootaola9172]

Yes yes yes. Please pleeeease more videos about meshing. So many things to cove regarding meshing, I would love to ask for the trending in preferred meshing approaches today, polyhedral meshing, hexahedral with cut cell structured meshing. Specially the later, how block cutting complex geometries, I have not found any (and by any I mean really any) source to learn how to block cut complex 3d geometries (any source of documentation to learn about this would be much appreciated )...in any case much love ❤️❤️

[@fluidmechanics101]

Lots of meshing content to come this year! It's going to be an awesome year

[@hardiksharda9673]

@@fluidmechanics101 Woohoo 🤘🏻

[@markmateo7074]

Let's gooo!! 🤘😎🤘

[@NanoActuator]

High-quality information and presentation as always.

[@sirishprakashbaskar8784]

Excellent content Sir. Follow a lot of your videos which are very informative..

[@1992Nereida]

Another video that is absolutely fantastic! Love your channel :) Would love to watch more videos focusing on meshing and mesh convergence analysis.

[@EclecticVibe]

Thank you for another great explanation!

[@gauravshrivas2090]

more videos like this please.

[@chrisb7161]

Great content as usual! I’d love more videos on this material. Maybe a pros and cons of structured vs unstructured grids. I personally love how much faster structured hex grids typically run in fluent and how much less memory they require. Also you can use a coarser hex grid while running a third order QUICK scheme to make up for the coarseness to a degree :)

[@fluidmechanics101]

Yes, I really want to dive into meshing a bit more this year. I think it is a massive topic with lots of interesting features to talk about

[@حسنخرمي-ف2ز]

Thanks Dr. Aiden for the good explanation. For meshing can we have a talk on dynamic meshing methods: smoothing, layering, …. Also looking forward for pressure based Vs density based solvers. What is happening behind the seen? and what should we use? Up to what speed can we use pressure based solver? Stability in both solvers?

[@rafaortwein6646]

Thanks for the material

[@AhmedSamir-xt1cz]

thank you, very informative and concise injection

[@jloudefonty3231]

Clear illustration, thank you

[@BobBeatski71]

One useful technique I used when learning to implement SnappyHexMesh was to have a square tube with rounded corners, the tube width decreases along the length of the tube. Eg start of tube is 10x10cm with 1cm chamfer. End of tube is 5x5cm with 0.5cm chamfer. This causes the meshing tool some headaches as it tries to match the changing radius the further down the tube it meshes. Once completed, use ParaView to create a slice animation viewing square-on in 2D. The result is a bit like a brain CAT scan. I used this technique to see just where my meshing parameters began to fail

[@sanjaykumaryadav3186]

Yes we want more videos

[@DiegoAndrade]

bravo again!

Well done! Thanks.

[@cwong9241]

Thank you for your useful presentation. Do you think the gap between structured and unstructured mesh is reducing and we can have more confidence on solving CFD problem using unstructured mesh? Thanks

[@fluidmechanics101]

... personally I think that unstructured meshes have been demonized unfairly over the years and the reasons why structured meshes are 'better' have been forgotten or ignored. They are both good in different areas of a complex model. The 'best meshes' nowadays often use a mixture of both! Over the next few videos I want to actually cover these reasons in more detail, so you can see that it is not as easy as 'structured is best'. There are definitely scenarios where structured meshes are actually worse! (Stay tuned 🙂)

[@cwong9241]

@@fluidmechanics101thank you for your reply. I am definitely looking forward to these series of videos! Thanks

[@chenguangzhang8292]

Great work as always. I am a bit curious that your slides are dated July 2023.

[@fluidmechanics101]

I actually planned to release this lecture later this year (July) but have brought it forward to January. I am releasing some more meshing content soon and I thought it better to release this one earlier this year to help explain the more advanced meshing. Hopefully it will be worth it!

[@anudeepgupta3799]

Hola, the way I see Pyramids in mesh has been changed after watching this video from you, i want to know some more detailed discussion why people will tell, more count in pyramids will give convergence issues., detailed talk on this will be well appreciated in advance.

[@fluidmechanics101]

If you ever go to Egypt, you will never look at the great pyramids the same again ...

[@buhatmarccarlson832]

Awesome vid. Does this apply to FEA?

[@fluidmechanics101]

Good question. Honestly I don't know. Really this is a specific issue for finite volume CFD

[@Yash-y9d]

does it also happen that volume cells are developed first and then top cap and then boundary layers? could to boundary layers also be of shapes other than square and triangles from top view?

[@fluidmechanics101]

Yes, some mesh generators go the other way around (top-down rather than bottom-up) like snappyHexMesh. I made the video in a bottom-up direction because I think it is easier for understanding the problems that can arise and how poor quality cells can be created (which is what we normally care about as users who have to fix bad meshes!)

[@elifyldrm7736]

Thank you a lot for keeping basic explanation of importants points of CFD :)

[@navidshayesteh1275]

could you please introduce a free online book related to CFD and its techniques?

[@fluidmechanics101]

How about 'Notes on Computational Fluid Dynamics' by Greenshields and Weller? You can get it online for free on CFDdirect.com (or Google search)

[@parthgoyal6381]

It will be more better if you can provide with reference papers, thank you

[@DessieQF]

Bro is living in July 2023 :D

[@fluidmechanics101]

Fluid mechanics from the future ✨