Abstract: At present, the environmental pollution is turning worse , the organic volatile compound and toxic gas of typical ink volatile gas has been more attention, the diffusion characteristics of these printing emissions is worth in-depth studying. In this context, the international gradually rises interesting of proliferation of harmful gas researching, and these studies bring continuous innovation and fast developing in diffusion model and the theories of mathematical modeling. In recent years, along with the rapid development of computer technology, researchers use the advanced computer technology to the field of numerical simulation and develop a variety of useful numerical simulation software, and the FLUENT is one kind of software that widely used in the field of heat transfer and flow numerical simulation. For the exhaust of the diffusion of printing in the limited space, this article uses FLUENT software for its diffusion process simulation, gets the space distributing of printing emissions at the different time, realizes the pervasion direction and concentration distribution, and analyses some special phenomena in the diffusion process, it gives the effective guidance to the design of exhaust-related emissions . The main contents and conclusions of this article:
(1) Refer to the relevant literature and data, analysis of the main ingredient of printing process emissions. And confirms the targets for investigation, introduces the development profiles of gas diffusion model and the effect factors of gas diffusion.
(2) Describe the development survey of gas diffusion model software, expatiates two aspects about the gas diffusion simulation software of the FLUENT and the numerical simulation.
(3) Understand the mathematical model of gas diffusion simulation and numerical methods.
(4) Combine the mathematical model which mentions above , uses FLUENT software to numerically simulate gas diffusion about the toluene within the limited rectangular space numerical simulation, and bases on the results of numerical simulation, intercepts the related distribution graphics, discusses the temporal distribution, concentration distribution, diffusion direction of toluene gas in the rectangular spatial.
Keywords: Limited Space; Diffusion of Gases; Numerical Study; Concentration Distribution