Add effective surface tension#229
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Codecov Report❌ Patch coverage is
❌ Your project check has failed because the head coverage (76.19%) is below the adjusted base coverage (76.41%). You can increase the head coverage or adjust the Removed Code Behavior. Additional details and impacted files@@ Coverage Diff @@
## master #229 +/- ##
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- Coverage 77.40% 76.19% -1.22%
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Files 55 53 -2
Lines 9436 9326 -110
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- Hits 7304 7106 -198
- Misses 2132 2220 +88 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Summary
This PR adds an effective surface tension (EST) treatment for CCN activation as an alternative to the existing constant surface tension assumption. Previously, Köhler-based CCN activation in PartMC assumed a fixed surface tension (typically that of pure water), which does not capture the surface-tension lowering caused by surface-active organics (surfactants). The new method estimates a composition-dependent effective surface tension per particle, so surfactant effects on droplet activation are represented explicitly.
Reference
The EST formulation and its evaluation follow: