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

shiren77 · March 19, 2011, 21:36

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.

cfd_newbie · March 20, 2011, 03:46

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

shiren77 · March 20, 2011, 08:38

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.

shiren77 · March 20, 2011, 08:47

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.

JBeilke · March 20, 2011, 14:11

Have a look at this:

http://www.youtube.com/user/XFlowCFD

It seems to be really cool :-)

shiren77 · March 20, 2011, 21:27

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.

sheikh nasir · February 14, 2012, 08:32

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

February 14, 2012, 08:32	train moving in tunnel help	#7
sheikh nasir 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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March 20, 2011, 03:46		#2
cfd_newbie 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, 08:47		#4
shiren77 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
JBeilke Senior Member Joern Beilke Join Date: Mar 2009 Location: Dresden Posts: 498 Rep Power: 20	Have a look at this: http://www.youtube.com/user/XFlowCFD It seems to be really cool :-)