Modeling liquid-gas transfer with penetration theory

[james jery]

Hi, all! I want to implement a gas-liquid mass transfer model using the Penetration Theory in Cantera. The formula is like:
N_{A}=\beta(2\cdotH\cdotp_{A}\cdot\sqrt{D_{A}/\pi t})

I met challenges here are: 1. p_A comes from another phase; 2. The rate depends on time

If using the ExtensibleConstPressureReactor module, how to add surface and get gas_A from the other side?

If using ExtensibleRate module, how to get time from ReactorNet?

Thanks!