THERMOPHYSICAL PROPERTIES OF GREENHOUSE GASES THERMAL-CONDUCTIVITY AND DYNAMIC VISCOSITY AS FUNCTION OF TEMPERATURE AND PRESSURE

Modelling the atmosphere and its flows requires the knowledge of the p hysical and chemical properties of its components. In this work therma l conductivity and dynamic viscosity as function of temperature and in side well stated pressure constraints are evaluated for the major gree nhouse gases as methane, carbon dioxide, nitric oxide and nitrogen dio xide and for the normal air. A general review of the existing experime ntal data is presented, together with a critical analysis of their pre cision and accuracy. Correlation and prediction methods are proposed t o allow the estimation of thermal conductivity and dynamic viscosity w hen experimental values are not available.