System simulation adds value for applications across all industries. In this tutorial, we'll have a look at a supply chain application. We'll implement a warehouse model and an order management function in Modelica.

Check it out here: https://www.eradity.com/blog/32-modelica-series-using-functions

Overflow in combined sewer systems is a serious issue that pollutes the water in streams, lakes, and seas.

In this tutorial, we'll use the Fluid library of the Modelica Standard Library to investigate and find solutions to the problem.

Check it out here: https://www.eradity.com/blog/34-modelica-series-wastewater-overflow

Hi all (if there is anyone left),

Browsing around the web looking for answers to my (many) Modelica issues, I stumbled upon this sub, only to find it was as good as dead. I'll be working hard on reviving it. Any suggestions are welcome!

See you soon,

ModelicaMod

Hi,

I've recently published a series of Modelica tutorials. The purpose of this series is to introduce Modelica and system simulation to a new audience and give you an idea of how it can support your innovation processes. In the first chapter, you'll learn how to simulate a pendulum model.

You can find it here: https://www.eradity.com/blog/29-modelica-series-introduction-to-modelica

I hope you like it!

Hi all,

Has anyone tried and successfully connected Fluent with modelica for a system level simulation, where one of the component requires a fully developed (3D simulation result) from Fluent, which is fed to modelica (co-simulation, model exchange are some other relevant keywords for this problem)

I want to build a heat exchanger model within Modelica, that can have its tube's wall temperature/exit temperature values obtained from the full 3D simulation, so that a 100-200 tubes arrangement can be feasibly simulated with the use of modelica.

Initial searches suggest twin builder for fmu coupling within ansys environment and a TISC tool that couples these two.

Can anyone suggest any pointers/thoughts/experience regarding this type of coupling? Or if my approach is correct or not?

I know that Simulink will overall be better than the free alternatives since it has been well connected with many industries and academics.

But I understand alternatives exist wanted to see if people really use them? Probably not for big companies like boeing (I've asked) or NASA, but maybe like a niche satellite startup or a small engineering team in a big org.

It might be better for me to try out developing a project in multiple environments and writing a blog about it lol, but that sounds like more work...

Introduction:

We all know Python is an amazing language with a zillion libraries out there for almost everything. However, when it comes to solving differential equations, IMHO, it has its own limitations. For example for a simple second-order ODE with scipy one has to have lots of boilerplate from defining a function, extra variables, discretizing, etc. Modelica Language, on the other hand, is the "de facto" language for solving systems of ordinary differential, algebraic, continuous and discrete equations. There are even attempts to solve PDEs in Modelica. Also, it is a known fact that Modelica is superior to SIMULINK due to:

1. being an open standard adopted by many big players in the industry including Wolfram, Maple, ESI, Dassault Systèmes... in contrast to SIMULINK-SimScape being proprietary of MathWorks
2. having FLOSS implementations OpenModelica and JModelica
3. being able to model in non-causal form versus SIMULINK's limited capabilities and issues with causal loops...

Now there are two different ways to develop Modelica models, one the block-diagram visual programming environment (somewhat similar to what SIMULINK offers) provided by for example OpenModelica (as can be seen in this demo), and the other programing it directly in Modelica Language. I'm personally in favor of the later just because visual programming has its own limitations and very soon your block diagram can get complex, ugly and confusing...

with all that said Modelica has a niche community and the language is not as awesome as Python when it comes to libraries, flexibility, plotting, and just programing in General. This is where JModelica and its packages pymodelica, pyjmi, and pyfmi, shine. Thanks to JModelica one can write the entire model in Modelica language and solve it with JMoldeical solvers and then get the results directly in Python for plotting and much more analysis or even optimizations. I'm not gonna lecture you about the syntax of Modelica Language you can find a lot of information here Modelica by examples written by Michael Tiller.

In comparison to OpenModelica which is pretty much plug and play, JModelica, however, is not as straight forward and this might frighten non-tech savvy users, especially in Academia. So here I'm going to explain how the software needs to be installed. I will e

How is it possible that there is no well made series of training videos anywhere online? I'm talking a 20 part video series that explains all the concepts and shows some simple tutorial examples. It doesn't seem too hard to do, I looked everywhere (free and paid) but I found nothing. What am I missing?

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

Do your worst!

They were cooked in Greece.

I'm surprised it hasn't decade.

Don't you know a good pun is its own reword?

Two muffins are in an oven, one muffin looks at the other and says "is it just me, or is it hot in here?"

Then the other muffin says "AHH, TALKING MUFFIN!!!"

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂

It really does, I swear!