Mrinmoy Bharadwaj
Ansys Employee

Thanks for reaching out to Ansys for your query.

Although, more elaborate details are needed to reply to your query, I can say that humidity is not a parameter that is present directly in Maxwell's equations and so a direct calculation of humidity might not be possible from EM simulation. However, if the relative humidity can be expressed as a function/expression of one or more of the parameters contained in the Maxwell equations for the medium, you might be able to reverse-calculate the humidity from the evaluated value of the function/exression.

Hope that helps.

Have a good day.