Isothermal Boundary Conditions for Reacting Flows

[DimAdam-01]

Description

Summarize your changes and the motivation behind them.

This PR introduces isothermal wall boundary conditions to support accurate heat transfer modeling in chemically reacting flow simulations, specifically targeting solid fuel combustion geometries/

Fixes #(issue)

Type of change

• Bug fix
• New feature
• Refactor
• Documentation
• Other: describe

Key Changes & Additions:

Isothermal Boundaries: Added support for isothermal_in and isothermal_out flags alongside T
wall_in and Twall_out parameters across all domain boundaries in m_boundary_common.fpp.

Updated the boundary condition (slip and no-slip) logic to correctly evaluate the ghost cell temperature based on the specified wall temperature and the interior domain state, driving the correct heat flux.

Testing

How did you test your changes?

Test 1: Dual Isothermal Wall.

Test 2: 2D Flow in a Channel with Isothermal walls

2D_Thermal_Plate.mp4

Checklist

• I added or updated tests for new behavior
• I updated documentation if user-facing behavior changed

See the developer guide for full coding standards.

GPU changes (expand if you modified src/simulation/)

• GPU results match CPU results
• Tested on NVIDIA GPU or AMD GPU

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