Study On The Diffuse Characters Of Plants For Vehicle Exhaust Pollutant CO

With the numbers of automobile increasing tremendously, automotive emission has become the primary origin for air pollution in recently years, so environment protection is important to human fate in future. It is urgent to decline the harm of automotive emission to the minimum degree for purifying the air and maintaining the continuous development of people. The measures studying on the law and the models of automotive emission diffuse are necessary to cure or degrade automotive emission. Many experts focus on using the adsorptive ability of plants to restore the air.Just owing to the adsorptive ability of plants, this paper makes deep research on the diffuse characters of automotive emission in the circumstance of plants, by using the CFD FLUENT software. The basic work is that applying the theory and the method of hydrodynamics to simulate the flow course of air current which considering automotive emission as the root of it under the condition of plants existing, taking the yard of air stream blasting in the vertical direction of plants as simulating yard for numerical calculating. According to the models of mathematics and physics, it simulates the three-dimensional of air current by using the method of SIMPLIC and the model of RNG k -ε, as well as the key of scatter equation in this paper. It adopts the rational experiment project and method to test the effect of plants for automotive emission diffuse. According to the result comparing with the test and numerical simulation, the reliability of RNG k-ε model applied in numerical calculating for automotive emission diffuse is proved, as well as the feasibility of borderline condition method applied in this paper. At the same time it put forward some reasonable advice on using plants to purify automotive emission, combining city virescence and traffic sight it confirms the diffuse characters of automotive emission, which provide important foundation plat for studying the adsorptive ability of plants in ecosystem and the measures of prevention and cure for automotive emission using plants, as well as promoting development of the diffuse model and the measures of prevention and cure for automotive emission further.