|7 days ago
|8 months ago
|GNU General Public License v3.0 or later
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I gave a presentation on the use of Python in aerospace engineering
3 projects | /r/AerospaceEngineering | 16 Mar 2022
AeroSandbox - an optimization suite that combines the ease-of-use of NumPy syntax with the power of modern automatic differentiation. AeroSandbox contains dozens of end-to-end-differentiable aerospace physics models, allowing you to simultaneously optimize an aircraft's aerodynamics, structures, propulsion, mission trajectory, stability, and more. Best of all, it is designed to be run on a laptop, not a supercomputer.
Which one is best for numerical simulations for fluid mechanics [mostly linear terms].
3 projects | /r/CFD | 3 May 2023
Poisson's Equation is the most powerful tool not yet in your toolbox
3 projects | news.ycombinator.com | 6 Jul 2021
There are many different ways to do what you'd like. The easiest starting point would probably be this tutorial: https://github.com/barbagroup/CFDPython
But that won't handle turbulence. The real "turbulence problem" is that computing actual turbulent flows requires enormous computational resources. So instead of solving the Navier-Stokes equations, related equations with lower computational cost are solved. Because of how these equations are developed, they require modeling of "unclosed" terms, and this is a likely source of inaccuracy.
If you want something relatively simple, you could take the RANS approach and use the Spalart-Allmaras model:
2 projects | news.ycombinator.com | 6 Feb 2021
I sniff an air of condescension; what’s your goals therein? Are you posturing your ‘maths’ knowledge?
I thought I was explicit in my criticism of “notation only” explanations, but perhaps a positive example would be more explicit.
This repo explains computational fluid dynamics (an example of a complex system!) from “what is a python function” to “2d Navier stokes”.
It shows the work of how to discretize ‘latex beautified’ notation, shows the relationship between the computations and the notation, and even explains when their LaTex strays from “conventional use of notation” and why.
The authors even throw in traditional handwritten board lecture videos if that helps you learn better.
complexityexplained reads like it’s written by the Spider-Man points at Spider-Man meme.
AeroPython: Classical Aerodynamics with Python
2 projects | news.ycombinator.com | 24 Jan 2021
See also by the same professor CFD Python: 12 Steps to Navier-Stokes: https://github.com/barbagroup/CFDPython
What are some alternatives?
AeroPython - Classical Aerodynamics of potential flow using Python and Jupyter Notebooks
PteraSoftware - Ptera Software is a fast, easy-to-use, and open-source software package for analyzing flapping-wing flight.
jsbsim - An open source flight dynamics & control software library
Nalu - Nalu: a generalized unstructured massively parallel low Mach flow code designed to support a variety of open applications of interest built on the Sierra Toolkit and Trilinos solver Tpetra solver stack. The open source BSD, clause 3 license model has been chosen for the code base. See LICENSE for more information.
AlgorithmicTrading - This repository contains three ways to obtain arbitrage which are Dual Listing, Options and Statistical Arbitrage. These are projects in collaboration with Optiver and have been peer-reviewed by staff members of Optiver.
homemade-machine-learning - 🤖 Python examples of popular machine learning algorithms with interactive Jupyter demos and math being explained
Zygote-Mutating-Arrays-WorkAround.jl - A tutorial on how to work around ‘Mutating arrays is not supported’ error while performing automatic differentiation (AD) using the Julia package Zygote.
xflrpy - xflrpy is a python enabled version of xflr5 for scripting and design optimization.
poisson-canvas - Explore poisson equation with HTML canvas
Flow - Flow is a sparse grid-based fluid simulation library for real-time applications.
machine-learning-and-simulation - All the handwritten notes 📝 and source code files 🖥️ used in my YouTube Videos on Machine Learning & Simulation (https://www.youtube.com/channel/UCh0P7KwJhuQ4vrzc3IRuw4Q)