A NEW METHOD FOR NUMERICAL SIMULATION OF TWO TRAINS PASSING BY EACH OTHER AT THE

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Abstract:A new method is proposed to numerically simulate problems of trains passing by each other at the same speed,and is implemented in UDF language of commercial software Fluent.Because only a half of the computational domain is required and the dynamic mesh technique is avoided,the computational efficiency is greatly improved.A two-dimensional test case is used for validation,which shows that the flow field and the pressure wave during the train-passing events can be correctly calculated by this new method.This method can be easily extended to three-dimensional simulations,to deal with practical problems.

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Author:

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3D2F-n@8L y0ZHAO Xiao-li[1] SUN Zhen-xu[2]

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作者单位:

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bx S)hunc"w@0School of Aerospace,Tsinghua University,Beijing,ChinaState Key Laboratory for Turbulence and Complex Systems,College of Engineering,Peking University,Beijing,China

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Keywords:

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trains passing by each other水利论文w+~:U/v/|"Q q(N

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rotational symmetry

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dynamic mesh水利论文g:pz _(U$J"d,Q$A o

3A^ ])y(t'z:A0` T0pressure wave水利论文3S3W7l^'[` oJg H

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TWO NUMERICAL SIMULATION computational efficiency new method problems pressure wave flow field test case practical deal with software required language extended dynamic during domain mesh UDF水利论文h3l[\~*d2o

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