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Transport of dangerous goods tankers dynamic distribution of gas concentration field modeling analysis

Differences, leading to dangerous gases in the air was the proliferation of two trends that \This effect can be dangerous depending on the nature of the gas through the diffusion coefficient in the z direction that out. (3) the boundary and initial conditions in the infinite distance away from the field source,stivali ugg, the concentration of dangerous gases is clearly zero. ∞ fII a time when IYI-cx3, Q a 01. 【2 + + o. In the deck, dangerous gas mixture can not interact with the steel deck (no chemical reaction), so a 0, D pull out 10. Total, 94 Naval University of Engineering No. 5 of 2000 83 points for the concentration of the source, according to the nature of the active site, the presence of coordinates (O, 0, H) of the point source, can be handled as follows: When z 一 0, uQ-M3 (y) ・ (z-H) where: M a source per unit time emission; () a Dirac function. On the function of the nature of mathematical equations in the book has many details,ugg italia, not in this discussion. (4) diffusion parameter DDD: discussion of the diffusion coefficient of the former Soviet Union in the prediction and control of air pollution made a special analysis [5], in the near-surface \z \facility layout and deck area adjacent to the temperature gradient. Analysis can be dangerous by the analytical model of gas diffusion: f +\一 0, uQ-M3 (y) ・ (z-H) is usually solved using numerical methods (finite difference or finite element method). Boundary conditions can also be simplified in the steady period of time after treatment by using analytical method [6]. The results with the analytic method is: n-M ... a factory \【ten 1) 'lJ4 conclusions tankers carrying dangerous goods dangerous vapor concentrations outside the dynamic distribution of regulatory requirements is to develop the basis for such vessels is one of hazard identification and the limits of such ship design. This study can be established with full hazardous gas concentrations in the description of the mathematical model for the development of the design and manufacture of such vessels,ugg boots günstig, loading or unloading goods in the course of the specification provides the necessary theoretical basis. References: [1] Ichiro Takamatsu, FanLT. Environmental Systems Engineering [M]. Beijing: China Environmental Science Press, 1992. [23 Qi Huan. mathematical model approach [M]. Wuhan: Huazhong University of Science, 1996. [3] Kang Li-shan. non-numerical parallel algorithms [M]. Beijing: Science Press, 1997. [4] Yao correct. Methods of Mathematical Physics [M]. Wuhan: Wuhan University Press, 1997. [5] Bu Dake BM. mathematical physics problem solutions [M]. Chongqing: Science Literature Press, Chongqing Branch, 1982. [6 ] Bill JM. combustion air dynamics [M]. Translated by Chen Xi. Beijing: Science Press, 1979.AmodelanalysisofdynamicdistributionofdangerousgasconcentrationfieldonliquidcargovesselYANGGuan-liang (Dept.ofBasicCourses,ugg stivali, NavalUniv.ofEngineering, Wuhan430033,true religion jeans, China) Abstract: Theformationofexpansionsourceofdangerousgasonliquidcargovesselisanalysed.Theinfluencefactorsofexpansionsourceandtransfermodeofdangerousgasarediscussed.Themathe-maticalmodelofdynamicdistributionofgasconcentrationfieldiuiltup. Ananalyticmethodofthemodelisgiven.Keywords: dangerousgoods; mathcmatica1mode1; dynamicdistribution

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