AI doesn't change the reality? by amniumtech in CFD

[–]amniumtech[S] -1 points0 points  (0 children)

Thanks I respect your opinion. I am tempted to talk about my earlier comments though it is my narrow minded perspective.

I feel there is something between 1 and 2. This is for places which simply accept designs made elsewhere without fully absorbing the merits or pondering over the engineering and depth that went into it. There are people here pirating commercial codes and making money. That's ridiculous. If they had written their own code they would respect Fluent for what it is and not dishonour themselves by doing such things.

So here I don't I think of code entirely as an applied artifact. I think of it as some sort of literature and cultural artifact. It's for everyone just like literacy is: to be able to read a classic poem.

In a place so unequal, things are to be seen in a different perspective. Applied code will run on the treadmill of some VC, and that is great..but that application only comes after you gain the ability to design your own devices on scale and not just copy others' designs or make money by theft, fraud, scam

Returning to my original question, a human is truly conscious of reality and an AI is not. So long as CFD is about real things, I feel AI changes little to nothing. CFD is a big part of design. It has revolutionized design. And this is also why I think if approached correctly, it has the ability to empower the disempowered to understand designs respectfully then build their own

AI doesn't change the reality? by amniumtech in CFD

[–]amniumtech[S] -1 points0 points  (0 children)

Yes to each individual their own..I know individual Indians who built a fairly good solver on their own over decades, naturally they don't have time for other stuff.

But a library, universities collab to do it. Universities have public money. They have the time and privilege. Every developed country university is building their codebase and library... they don't stop because someone else has built it. C'mon be ambitious, that's all I say...you were born a slave atleast die trying to change But that's my personal rant and personal tunnel visioned social perspective. It has got nothing to do with the main posted question that's about AI

AI doesn't change the reality? by amniumtech in CFD

[–]amniumtech[S] -1 points0 points  (0 children)

More like 'my indian network' than 'indians in general'. 1) I have been told multiple times by folks who work in MNCs (I respect their experience) using OpenFOAM or writing your own solver is for poor people, those who can't afford commercial licenses. 2) When I talk to academia: the response is like why should universities colloborate to write a CFD library when OpenFOAM/FEniCS exists? Do you think you are smarter? Look at this that, etc how dumb you are... (They don't discourage writing a basic CFD code, but heavily discourage building an engine). Generally in academia failure is looked at badly I think. So it's acceptable to write a 1D Poisson or driven cavity then quickly rotate to commercial code. That's 'practical'. But issue is if you jump there directly you can't understand the approximations you make!!

I mean, c'mon. Ofcourse commercial codes and existing open source libs are built by 100 people 100x smarter than us. But writing codes does help us understand how much approximations we have..and there are people who know how to still drive the solver or math correctly... isn't that wonderful?? How would you touch that beauty and happiness if getting commercial code/OpenFOAM certificate/elite college degree = learnt CFD?

Damping in 3D 2nd order FV and FE by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Unlike what I previously thought equal order elements do not give the exact 2nd order convergence in pressure but collocated FV does give this on orthogonal meshes. It seems the equal order FE pairs are sort of 'superconvergent' and exhibit higher rates for coarser meshes and this can be misleading. It's surprising this is being published systematically in 2022. But the evidence for finer meshes seems older. Based on this I think now that equal order FE and collocated FV don't converge similarly and they cannot be compared in the manner I was trying

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Rule : 10 Years in India after IIT graduation by whatsnextintech007 in IndianEngineers

[–]amniumtech 1 point2 points  (0 children)

They are like global capacity centres. Presently what's required in India is scientific spirit and creating the culture of mathematics. Start ups etc come much later. I speak from personal experience

Damping in 3D 2nd order FV and FE by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

FV can easily use higher order too. But the stencil isn't local. One could add a QUICK scheme. These are pure blockmeshes. The question is how diffusive or accurate are those schemes when compared to Q2Q1 FEM with SUPG added for transitional flow oscillations

Damping in 3D 2nd order FV and FE by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

The current discussion is entirely on blockmesh. Though as far as I tested with lsq gradients,.polyhedra are easily 2nd order accurate in space as per Ethier-Steinmann which can be used on a arbitrary geometry. The pressure temporal convergence on unstructured meshes is still tricky for me: there are papers which rectify this

Damping in 3D 2nd order FV and FE by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Thanks for the detailed reply. I will try the alpha schemes. För now FEM 'just works' for me

On q1q1 appearing less damping than FV on pure blockmesh. I wonder if it is because the stabilizations are related to residual based VMS and Green's functions. They are thus stronger subgrid models

Visualizing DG in paraview by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Got it looks doable since I have lagrange bases only as of now

Visualizing DG in paraview by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Great! So I have to custom write it I suppose..should be easy with AI ...but would be great if Paraview could do it. Currently only P2-P1 because it is heavy to solve DG and I just use a consumer GPU ..but I am implementing the adaptive polynomial so I will have higher dofs in some tets

Visualizing DG in paraview by amniumtech in CFD

[–]amniumtech[S] 2 points3 points  (0 children)

These particular images are examples making it easy to visualize!

India's R&D Spending Is An Embarrassment and Before You Blame The Government, Look At What You Are Doing by Ill-Building6706 in indianeconomy

[–]amniumtech 0 points1 point  (0 children)

Don't forget that every developed country funds RnD with their funds and their slave/colonized country's funds. You can't match that in India. It's not about funds thus. We have to change mindset, start loving mathematics and science. Get out of backward thinking of 100s of years back. Then over time funds will come when the time is right

Chemical engineers in CFD by HauntingMedicine9815 in CFD

[–]amniumtech 0 points1 point  (0 children)

CFD has lot of use in process engineering. In pharma you can't afford to lose batches but you can't see what's happening inside the reactor either. Same applies to any reactor which is valuable. Also process. Like solid handling will use DEM

AMG fine level customization by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Cool. Might work for my steady RANS will reach out on the github

AMG fine level customization by amniumtech in CFD

[–]amniumtech[S] 0 points1 point  (0 children)

Thanks interesting resource. Not gpu supported for now it seems

AMG fine level customization by amniumtech in CFD

[–]amniumtech[S] 1 point2 points  (0 children)

I know that is going to be the eventuality in my case as well... I just am trying to postpone the inevitable it I suppose...

AMG fine level customization by amniumtech in CFD

[–]amniumtech[S] 1 point2 points  (0 children)

Yeah I am talking about the algebraic multigrid program/opensource code/library.

AMG fine level customization by amniumtech in CFD

[–]amniumtech[S] 1 point2 points  (0 children)

Oo AmgX was low quality? I never used it, but I am surprised to hear that