UPDATE There are quite a few people interested in the tools. The cloud service that runs our python code may be slow to respond to your requests. You can also use these tools locally on your own computer, the source code is available on github.
As engineers we often need rough estimates to get an order of magnitude (hopefully much better!) of some physical behaviour. In fluid dynamics and heat transfer this often results in using experimental correlations. Not a problem if you have just worked on it and can remember the 8-digit constant and the general form of the equation. But two weeks later? A year later? And sometimes you’re not actually an expert on the question at hand but still need a quick estimate: These calculations can be surprisingly time consuming. We started our nuflo engineering toolbox as a collection of simple tools for this kind of task. At the same time it serves to conserve our research and know-how.
These small online tools come with a short theory section to give an overview of the influencing parameters and an interactive section. Usually, the interactive section has sliders (and fields) to enter values and a plot showing the effect of the parameter change. The online version runs on a free heroku cloud instance and may be slow to start. If you find yourself using these tools a lot, contact us, or if you feel confident you can get the source code for free on our github account.
The first tool that we put online allows to interactively estimate the momentum boundary layer thickness based on simple correlations for the laminar and the turbulent regime.
Hint: Open the tools in a separate narrow browser window and place it next to other software’s windows.