v1.1 · June 2026
AI surrogate and pile fields
The validated AI surrogate, pile-field thermal interference, and time-varying and seasonal loads through Duhamel superposition.
Resources
Documentation, theory, and the live demo
Everything you need to learn the workflow, understand the coupled physics behind it, and run the surrogate yourself, in your browser.
Documentation
Start here
From a first solve to the full coupled workflow, the documentation walks engineers through every module.
Quick-start
Build a single energy pile from scratch, mesh it, and run your first coupled solve in minutes — no external pre-processor.
Learn more →User manual
The complete reference for the geometry builder, mesher, coupled solver, AI surrogate, and 3-D post-processor.
Learn more →Tutorials
Worked, step-by-step cases — single piles, borehole loops, and dense pile fields — that mirror the validated application gallery.
Learn more →Theory & validation
The coupled thermo-hydro-mechanical formulation, the analytical benchmarks, and how the surrogate is built and checked.
Learn more →Quick-start: from install to first result
1
Install
Run the single installer on a Windows desktop — no account, no internet, and no cluster required.
2
Build the geometry
Start a model and shape the domain with primitives and boolean operations on the built-in CAD kernel, or import a solid.
3
Set materials & boundaries
Pick faces to assign temperatures and loads, choose soil and structural materials, and define the U-loop with its inlet temperature and flow rate.
4
Mesh
Generate an analysis-ready tetrahedral mesh at coarse, medium, or fine resolution — built in, nothing exported.
5
Solve
Run the coupled thermo-hydro-mechanical solve, or evaluate the AI surrogate for an instant estimate while you iterate.
6
Explore the results
Read the colour-mapped 3-D temperature field with the pipe loop and soil response, then export what you need.
The full user manual, worked tutorials, and a theory & validation reference ship with the package. Request access to receive them.
Theory & validation
The physics under the hood
No simplified correlations. A purpose-built engine solves the full coupled problem, and an AI surrogate learns from it.
Coupled THM formulation
A custom finite-element solver resolves heat, pore-water and gas flow, and ground deformation together, with an embedded pipe-network model for the circulating fluid and a monolithic Newton–Raphson scheme across 17 soil and rock constitutive laws.
See the validation →Line-source & g-function response
The ground response follows infinite-line-source theory: a cooled thermal plume diffuses outward from each pile, and time-varying or seasonal loads superpose by Duhamel convolution to trace the slow drawdown — and the interference between neighbouring piles in a field.
See the validation →The validated surrogate
A multi-output surrogate, trained on real coupled finite-element solves, predicts outlet temperature, heat delivered, and pumping cost with a confidence band — R² 0.9997 and 0.009 °C mean error across 200 held-out runs, roughly 985,000× faster than a full solve.
See the validation →
Release notes
What's shipped
A short changelog of the coupled solver and the AI layer around it.
v1.0
Coupled THM solver
The custom thermo-hydro-mechanical finite-element solver, the CAD geometry builder and mesher, and the in-app 3-D post-processor.
FAQ
Questions engineers ask first
How accurate is it, really?
Terra is cross-validated against an independent commercial multiphysics code (0.08–0.38 °C outlet agreement across the flow range), instrumented field data (0.30–0.42 °C mean absolute error across three modes vs Faizal et al. 2016, one calibrated parameter), and closed-form analytical solutions (to ~6 significant figures). It solves the full coupled thermo-hydro-mechanical problem, not a simplified correlation.
Does the AI replace the physics?
No. The surrogate is trained on real coupled finite-element solves of your physics, and you can run the full solver whenever you need the exact field. The AI just makes design exploration instant instead of overnight.
What does it run on?
A standard Windows desktop. Terra Multiphysics is a self-contained application, its own geometry builder, mesher and 3-D post-processor, with a native solver binary. No cloud, no cluster, and no internet connection required.
Is my project data sent anywhere?
No. Everything runs locally on your machine. The optional natural-language copilot is the only feature that can call an external service, and only if you switch it on with your own API key.
Which systems does it cover?
Energy piles and borehole heat exchangers / ground-source loops, for both heating and cooling, including the soil–structure interaction that simpler tools ignore.
How do I get it, and what does it cost?
We're onboarding early-access design partners now. Tell us what you're working on and we'll share access and commercial terms that fit your team.
Live, in your browser
Run it yourself
The exact trained surrogate runs entirely client-side. Predict, optimize, or describe a design in plain language.
Bring coupled ground physics to your next design
We're onboarding early-access design partners now.
Request access