# simulate flow over a cylinder

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 February 28, 2006, 07:35 simulate flow over a cylinder #1 changkiang Guest   Posts: n/a hello, anyone is simulating (or has been simulated) flow past a cylinder? my averaged Cd(Re=1000~10000) is around 1.5 then much larger than that in experiment. by the way, my material is water, turbulent model LES, 35000 strctured grid in 20*40 mm computational domain. any suggestion is appreciated in advance!

 February 28, 2006, 13:48 Re: simulate flow over a cylinder #2 se Guest   Posts: n/a In the Reynolds number quoted, the flow is turbulent with significant spanwise flow structures. You should use 3-D model.

 February 28, 2006, 16:15 Re: simulate flow over a cylinder #3 MOHAMMED Guest   Posts: n/a well, you have a low Reynolds number so unsteady vortex shedding is expected. so you have to enable usteady solver and to have a fine mesh. using dynamic mesh adaptation will be useful. but i dont think that using 3d model will be a good idea, especially if you dont want to simulate the instability in the flow.

 February 28, 2006, 16:36 Re: simulate flow over a cylinder #4 Ahmed Guest   Posts: n/a 1- www.studentfluent.com 2- click on tutorial lib 3- tutorial 6 Flow past a circular Cylinder

 February 28, 2006, 16:48 Re: simulate flow over a cylinder #5 onlooker Guest   Posts: n/a Thanks Ahmed!

 March 1, 2006, 00:02 Re: simulate flow over a cylinder #6 changkiang Guest   Posts: n/a thank u man! the website is awfully helpful i believe.

 March 1, 2006, 00:17 Re: simulate flow over a cylinder #7 changkiang Guest   Posts: n/a i agree with u,MOHAMMED. BUT, these is a problem, how to use dynamic mesh adaptaton? i'v ever done vortex induce vibration(VIV)and once used dynamic mesh, and i don't think they are the same. THANX VERY MUCH!

 March 3, 2006, 18:13 Re: simulate flow over a cylinder #8 Ahmed Guest   Posts: n/a That is nice. So be good and spread the word around, do not keep it for your selves. You can also use google to look for more sites with free tutorials

 March 3, 2006, 21:25 Re: simulate flow over a cylinder #9 changkiang Guest   Posts: n/a i can not agree you more. thanks again!

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