# Help please！the problem in simulation of railway train passing a tunnel

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March 19, 2011, 21:36
Help please！the problem in simulation of railway train passing a tunnel
#1
New Member

Stone
Join Date: Mar 2011
Posts: 8
Rep Power: 15
hi，guys！I am useing sliding mesh to simulate the relative motion between the trian and tunnel.it is easy to converge,but the result is beyond my imaging，and wrong.attached is the fluent model and result contour.Any suggesiton or advice is appreciated.
Attached Images
 result.jpg (82.0 KB, 20 views)

Last edited by shiren77; March 22, 2011 at 22:09. Reason: exchange attached

 March 20, 2011, 03:46 #2 Senior Member   Raashid Baig Join Date: Mar 2010 Location: Bangalore, India Posts: 135 Rep Power: 16 Hi Shiren, Please post more details of your problem like the train speed, type of mesh and other details about the domain (model details). Why are you using sliding mesh ? Raashid

March 20, 2011, 08:38
#3
New Member

Stone
Join Date: Mar 2011
Posts: 8
Rep Power: 15
Thanks ,Raashid.The velocity is 350km per hour.The attached are pictures of local mesh aroun the nose shape，and boundary set.If more information is needed,please feel free to email to shiren77@gmail.com.
Attached Images
 local mesh.jpg (102.3 KB, 34 views) size and boundary.jpg (26.6 KB, 42 views)

Last edited by shiren77; March 22, 2011 at 22:16. Reason: wrong words

 March 20, 2011, 08:47 #4 New Member   Stone Join Date: Mar 2011 Posts: 8 Rep Power: 15 Raashid,sorry to forget you question.I think sliding mesh takes less time than dynamic mesh.you know，I am doing research on nose shape optimization，which need lots of analysis，so I prefer sliding mesh.

 March 20, 2011, 14:11 #5 Senior Member   Joern Beilke Join Date: Mar 2009 Location: Dresden Posts: 497 Rep Power: 20 Have a look at this: http://www.youtube.com/user/XFlowCFD It seems to be really cool :-)

March 20, 2011, 21:27
#6
New Member

Stone
Join Date: Mar 2011
Posts: 8
Rep Power: 15
Quote:
 Originally Posted by JBeilke Have a look at this: http://www.youtube.com/user/XFlowCFD It seems to be really cool :-)
Its really cool.But I have no money to buy it.Thank you all the same.

 February 14, 2012, 08:32 train moving in tunnel help #7 Member   Join Date: Jan 2012 Posts: 58 Rep Power: 14 hello i am working on train moving in tunnel. i am getting floating error:invalid number. can any one help me. my email is sheikhnasir39@gmail.com plz help me thanks

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