Rework temperature-dependent Henry's Law constant

[boulderdaze]

This PR:

• Part of Temperature-Dependent Henry’s Law and Condensation, Evaporation Rates #892
• Updates the API for the Henry’s Law constant class based on the discussion in Correctness of henry's law, phase transfer algorithms #890
  • Condensed species takes Species instead of Yield
  • pH is no longer estimated
• Removes the placeholder PhaseTransfer class

Note: The struct uses more descriptive parameter names than other places. If consistency is preferred, I can change this to the generic A, B, C parameter form.

  /// @brief Henry's Law constant parameters
  struct HenrysLawConstantParameters
  {
    /// @brief Henry's Law constant for the species at the reference temperature [mol L-1 atm-1]
    double H_ref_{ 1.3e-3 };
    /// @brief Enthalpy of dissolution for the species in solution [J/mol)]
    double enthalpy_{ -12000.0 };
    /// @brief The standard reference tempearture [K]
    double temperature_ref_ { 298.15 };
  };

[Copilot]

Pull request overview

This PR modernizes the Henry's Law constant implementation to support temperature-dependent gas-particle partitioning equilibrium based on issue #892. The changes simplify the API by removing pH estimation and switching from multiple dissociation products (Yield) to a single condensed species (Species).

Changes:

• Replaces HenrysLawCoefficient with HenrysLawConstant using van 't Hoff temperature dependence
• Removes the placeholder PhaseTransferCoefficient class
• Updates PhaseTransferProcess API to use Species instead of std::vector<Yield> for condensed species

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
include/micm/process/transfer_coefficient/henrys_law_constant.hpp	New implementation of temperature-dependent Henry's Law constant using van 't Hoff equation
include/micm/process/transfer_coefficient/henrys_law_coefficient.hpp	Removed old pH-dependent coefficient implementation
include/micm/process/transfer_coefficient/phase_transfer_coefficient.hpp	Removed placeholder class
include/micm/process/phase_transfer_process.hpp	Updated to use single Species instead of vector of Yield for condensed species
include/micm/process/phase_transfer_process_builder.hpp	Updated builder API to accept Species instead of Yield for condensed species
include/micm/Process.hpp	Updated includes to reference new HenrysLawConstant instead of removed classes
test/unit/process/transfer_coefficient/test_henrys_law_constant.cpp	New comprehensive tests for temperature-dependent Henry's Law constant
test/unit/process/transfer_coefficient/test_henrys_law_coefficient.cpp	Removed tests for old pH-dependent implementation
test/unit/process/test_process.cpp	Updated tests to use new API with Species instead of Yield
test/unit/process/transfer_coefficient/CMakeLists.txt	Updated test configuration to build new test file

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.75%. Comparing base (7f51575) to head (24d6a9c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #903      +/-   ##
==========================================
+ Coverage   94.66%   94.75%   +0.09%     
==========================================
  Files          66       65       -1     
  Lines        3245     3225      -20     
==========================================
- Hits         3072     3056      -16     
+ Misses        173      169       -4     

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