GEONEAT. Thermo-viscous feedback in heat transport through fracture-matrix systems with finite thermal capacity: numerical code and underlying datasets. v1

Reproduction package for the manuscript "Thermo-viscous feedback in heat transport through fracture-matrix systems with finite thermal capacity" (A. Lenci, submitted to Advances in Water Resources, 2026). The archive contains the MATLAB solver, the production runs, the Python figure scripts and the simulation datasets those scripts read, so that every figure in the manuscript can be regenerated without rerunning the simulations. It covers a semi-analytical theory of thermo-viscous feedback in a planar fracture exchanging heat with a rock matrix of finite thermal capacity, under a prescribed pressure difference: the exact finite-slab memory kernel and its tempered approximation, a perturbation expansion in the logarithmic viscosity contrast, and the finite-matrix similarity structure of the temperature field, breakthrough curves and front moments. The archive is limited to what is needed to regenerate every figure and re-derive every quoted number: exploratory runs and superseded variants are not included. Two files are digitised from published figures rather than simulated or measured, and are identified as such in the README together with their digitisation uncertainty. Deposited under the GEONEAT Data Management Plan (deliverable D1.1), dataset 1: Numerical Code of Flow and Heat Transfer in Fractured Media.