Dynamical Modeling Study on Coupling between Vapor-Heat-Mechanics in Landfill Gas Transportion
Xueqiang, Liangbing, Sun Keming, Liu Xiaoli
(Liaoning Technical Unversity, Fuxin, 123000, China)

Abstract: A dynamical coupling model of solid waste gas transport in landfill is established based on the theory of continuum mechanics, thermoelastic material mechanics, and the multi-fields coupling theory. Using the method of the perturbation and integral transform, an approximate analytical solution of the non linear mathematical model is obtained. The effects of gas pressure, temperature and strain in coupling dynamics field on compressed gas transform are studied. The pore pressure distribution in the process of solid waste gas transform is calculated in an example. The results make clear that the differences of coupling action and uncoupling action are obvious and the effects of coupling cannot be ignored. The result in the paper can be used for studies of diffusion of solid waste gas in landfill, the polluted gas collecting and preventing secondary-pollution.
Keywords: solid waste gas, vapor-heat-mechanics coupling, perturbation method, approximate analytical solution.