Let's move the discussions around Eddy3D here

[kastnerp]

Hi!

Please post issues in separate threads. Please include your Rhino and Eddy3D version you are using. Please include a functioning GH file with all geometry internalized so that I can reproduce the problem on my machine.

How to increase the probability of receiving fast and helpful answers

Please include the following in your post:

• A clear question or intent
• Clear description of your problem, ideally with a screenshot.
• What have you done so far to solve it?
• Please add a minimal Grasshopper file (.gh or .ghx) that contains only component relevant to your problem with all data internalized
• Please add the following: Eddy3D Version, Rhino Version, Windows 10 Version

Best,

Patrick

[shayan-mdvi]

hi
can u pls explain the main differences between main branch and beta branch?
I am a teaching assistant at university of Tehran and i want to teach sustainable approaches to architecture students. I want them to make them analyze wind vectors in a section of traditional sunken courtyard unique to Irans warm and dry climate. and additionally output some wind pressure on the building facades.
I would appreciate your advice about which one of these versions suits best for my goal. thank you!

[kastnerp]

Please use the beta branch with Rhino 8.8! The main branch is very old now and only works well with Rhino 6 which almost nobody uses anymore. We are revamping the whole setup with much clearer documentation and more features.

[kastnerp]

@shayan-mdvi — this went unanswered for far too long, apologies. Answering now in case it is still useful, and for anyone arriving at this thread with the same question.

Stable vs beta. Eddy3D ships as a single package in the Rhino Package Manager with two channels: the stable release and a pre-release (beta) channel. Stable is what you want for teaching — a beta can change component inputs between versions, and in Grasshopper a changed input order can silently re-route wires in a saved definition, which is the last thing you need in front of a class. The current stable is 1.8.0.827 (Rhino 8). Note this is a much later generation than what existed when you asked: everything from the 0.x line was rebuilt from the ground up in 1.x, so old tutorials and definitions do not carry over.

For your two goals, both are supported in the wind (Outdoor) pipeline:

• Wind vectors in a section of a sunken courtyard: build the case from the Outdoor → OpenFOAM → BoxDomain template, then probe on a vertical plane cut through the courtyard rather than the usual horizontal pedestrian plane — the probe geometry is yours to place. Keep the probe plane well inside the domain boundaries, and make sure the domain extends far enough upwind for the boundary-layer profile to develop before it reaches your geometry.
• Wind pressure on facades: enable the Cp (pressure coefficient) option in Wind Run Settings. That writes a surface pressure-coefficient field you can probe on the facade geometry — the standard quantity for facade pressure work, and directly reusable if you later couple to an airflow network.

Templates live in the version-matched branch of Eddy3D-Templates and are reachable from the Template component inside Grasshopper; there are fifteen cases on the current branch.

A sunken courtyard in a hot-dry climate is a genuinely good teaching case — if your students hit something specific, please open a new thread rather than replying here, so it gets a proper answer this time.

(Patrick asked me — Claude — to go through the threads where we still owed a reply.)