CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch

[aerohead]

McDonnel Professor of Aerospace Engineering, Antony Jameson, Princeton University, mentioned his CFD, FL067, in 1989, and the rest of the aerospace community were leaning on:
Lord Kelvin's theorem
Osborne Reynolds
Kutta-Joukowski
Ludwig Prandtl
Von Karmann's vortex street
Jones slender wing theory
Hayes theory of linearized supersonic flow
Hermann Schlicting's Boundary -Layer Theory
Navier-Stokes equations
Cartesian tensor notation
Inviscid Euler equations
Crocco's theorem
Prandtl- Glauert equation
Laplace equation
Galerkin Method
total variation diminishing (TVD)
upwind biasing
rotated difference scheme
first-order accurate
second-order accurate
multidimension Euler equations
flux limiters
Courant-Friedrichs-Lewy (CFL) condition
Newtonian iteration
Gauss-Seidel method
Jacobi method
Runge-Kutta schemes
Blended multistage schemes
multigrid time-stepping
elliptic equations
hyerbolic systems
Hyperbolic marching methods
potential flow equation by Bristeau et al.
control theory
conformal mapping
constrained optimization
partial differential equations
perturbation analysis
Lagrange multiplier
integration by parts
turbulence models
dissociation and chemical reactions at high temperatures
massively parallel computers
sophisticated pre-processing
sophisticated post-processing
integrated computer graphics
NACA
AIAA
American Mathematical Society
Society for Industrial and Applied Mathematics
Institute for Computer Applications in Science and Engineering
IMA Conference on Numerical Methods for Fluid Dynamics
NASA
Von Karmann Institute for Fluid Dynamics

[freebeard]

Most of those would be a parameter, until you get to the massively parallel, sophisticated pre- and post-processing integrated computer graphics. Then it turns to a laundry list.

https://towardsdatascience.com › gpt-4-will-have-100-trillion-parameters-500x-the-size-of-gpt-3-582b98d82253
GPT-4 Will Have 100 Trillion Parameters — 500x the Size of GPT-3
11 Sept 2021 100 trillion parameters is a lot. To understand just how big that number is, let's compare it with our brain. The brain has around 80-100 billion neurons (GPT-3's order of magnitude) and around 100 trillion synapses. GPT-4 will have as many parameters as the brain has synapses.

[aerohead]

On the VERSUS ENGINEERING site they mention:
* Computer Aided Design, with SIEMENS NX
* Model with, ANSYS Spaceclaim
* Mesh creation with, ANSYS FLUENT
* Solving with, ANSYS FLUENT
* Post-processing with, Paraview

[freebeard]

All the climate stuff gets links but this doesn't?

I went to www.makeuseof.com/ai-text-to-art-generators/ and tried their first choice, NightCafe. I poked it twice and this is what I got:



Obviously, it's like the Oracle at Delphi, you have to carefully craft the question to get a usable result. I got two [partial] streamline on the second attempt.

[Piwoslaw]

Originally Posted by NeilBlanchard

Niel, the color scheme is cool, but while you are still working on the aero, could you render the images without the paintjob? It make the details of the shape easier to see for us.

Also, since you mention that the underside slopes up, maybe you could generate a cross-section image?

[freebeard]

This doesn't help but I made the effort.

[ME_Andy]

Originally Posted by freebeard

All the climate stuff gets links but this doesn't?

I went to www.makeuseof.com/ai-text-to-art-generators/ and tried their first choice, NightCafe. I poked it twice and this is what I got:



Obviously, it's like the Oracle at Delphi, you have to carefully craft the question to get a usable result. I got two [partial] streamline on the second attempt.

Did you notice that the blue text on the second image appears to say "vessel"? Trippy

There's also a creepy dude instead of a mermaid on the front of the vessel.

I don't get anything out of the first image.

[Nathan jones]

Originally Posted by NeilBlanchard

I've just ordered 1 yard each of a range of s-glass and e-glass fabrics, that I will be making samples to test technique and strength.

Fiberglass Cloth

Things are moving along slowly, but moving nonetheless.

Who can tell me about how a chopper gun works?

Equipment

Does it spray glue on the chopped fibers? They don't mention a nozzle or a glue connection.

Those guns are for gelcoat. You can get guns that mix fibre with resin. For that purpose hand lay would be easier unless you make alot of cars further on for mass production. Also try S glass (very good choice/maybe best) biaxial or uni-directional if you can get it. Here Aerialite is only available in plain weave. Not the best final strenth by hand (in my opinion)

[Nathan jones]

You can also get uni with csm on the back

n.b like trees. Water likes soaking into the end grain, not the sides of grain. Fibre filament weaves are the same and resin is more viscous hence why commercial prepreg or infused can only get to 70-80% saturation. By hand CAN be better but keep trying

[freebeard]

Originally Posted by Nathan jones

Originally Posted by NeilBlanchard

Could you provide a permalink?

NeilBlanchard's last post was in another tread in July.