PETROS: A Program for Calculating Transport of Heat, Water, Water Vapor and Air Through a Porous Material

摘要

The one-dimensional code PETROS computes the transport of water, water vapor, an inert gas, and heat through a partially saturated porous medium. The mass flux of liquid water is driven by gradients in saturation, temperature, and gas pressure as well as the force of gravity. Gas transport includes effects due to Knudsen diffusion and binary gaseous diffusion of each gas component, plus Darcy flow of the gas mixture. Evaporation and condensation are accounted for, both in the fluid mass balance and the heat equation. This report includes a description of the model assumptions and the resulting equations, together with the numerical techniques used to obtain problem solutions. Included also are instructions for running the code, and a sample problem. 8 refs. (ERA citation 10:031779)