I Simulated Steve Mould's Counterflow Heat Exchanger

​‪@SteveMould‬ recently demonstrated a counterflow heat exchanger and explained why running two fluids in opposite directions transfers so much more heat than running them in parallel. It's a beautifully counterintuitive result, and it made me want to see whether Ferrion could reproduce it. So I modeled a two-chamber heat exchanger in Onshape, imported it into Ferrion's experimental Heat Exchanger workspace, and ran it: 70°C on the hot side, 13°C on the cold side, with a copper thermal interface between two plastic-insulated chambers. Along the way I walk through the whole setup, assigning inlet and outlet parts as ports, marking plates as solid boundaries, giving each part a thermal material, setting port temperatures and mass flow rates, and choosing a voxel grid fine enough to put two cells across a 2 mm wall. Then we watch the temperature field, streamlines, and surface shading evolve in 3D while the simulation runs. Ferrion is a CFD app for makers and hobbyists. It runs directly on your Mac or iPad. No subscription, no cloud credits, no per-run billing. One-time price. The Heat Exchanger workspace is available now in version 1.0. This counterflow example ships with the 1.1 release, coming soon, so you'll be able to open it and run it yourself. LINKS Onshape model: https://cad.onshape.com/documents/4ca0f26f... Ferrion on the App Store: https://apps.apple.com/us/app/ferrion/id67... Steve Mould's video:    • This Device Goes Past Equilibrium   Previous video (Visual Thinker comparison):    • Visual Thinker Created a Water Tunnel. I S...   CHAPTERS 0:00 Steve Mould's counterflow demo 0:53 Why I wanted to simulate it 1:27 Modeling in Onshape and importing STLs 1:37 Ports, solids, and thermal materials 2:17 Temperatures, flow rates, and grid resolution 3:05 Running the simulation 3:38 Reading the results 3:52 What ships in 1.1 Huge thanks to Steve Mould for consistently excellent science content and for inspiring this one. How would you use Ferrion? Let me know in the comments. I want to hear from you.