# axisymmetric comparing to 3D

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 February 1, 2006, 04:49 axisymmetric comparing to 3D #1 BB Guest   Posts: n/a Hello! Did anyone compare 2d axisymmetric simulation results with the ones done in 3d? How do they match? In my experience these two methods give me somewhat different results, but I still havent done any analisys about that. tnx, BB.

 February 1, 2006, 06:06 Re: axisymmetric comparing to 3D #2 vijay Guest   Posts: n/a I too got a huge difference between those two. But I could not find the reason for that

 February 1, 2006, 13:15 Re: axisymmetric comparing to 3D #3 Evan Rosenbaum Guest   Posts: n/a How well they compare obviously depends on your particular problem. We have done a few comparisons of axi vs. 3D, and have found that the 3D is not too much different. We happen to have a flow that is primarily axial, though, so you cannot expect the same from all problems.

 February 4, 2006, 04:26 Re: axisymmetric comparing to 3D #4 kharicha Guest   Posts: n/a Your question is too general.... Let's take a flow within a cylinder, driven by what ever... When you solve with 2D axisym. you will find only the solution which doesn't change in the theta direction. When you switch to 3D, waves can occur and travel in the theta direction. So Your solution can become periodic in the theta direction, i.e the solution repeats every Dtheta (=<2pi). But in some cases, when the flow reach the chaotic regime, your solution becomes totally unsymmetric....But this hard to model. When the turbulent regime is reached then a symmetry of the mean flow could be restablished.... So in general, for small Re your 3D solution should be axisymmetric....otherwise you have a problem...

 February 15, 2006, 12:18 Re: axisymmetric comparing to 3D #5 mariam Guest   Posts: n/a From: Miss Mariam Ibrahim Abidjan Cote d'Ivoire mariamibrahim1112@yahoo.fr Dear One, I am Miss Mariam Ibrahim,the Only Daughter of late Mr, BASHIR IBRAHIM the former rebelle suponsour leader in bouake west cost of cote d i'voire .I discoverd that my father deposited the sum of the sum of (10;800 000) Ten million eight hundred Thansand Million USA dollar in a security firm here in Abidjan ,and now i am in hiding in one of the city in Abidjan called Yopougoun . Due to infertility nature of my country politicaly, I wish to invest this money In your country. I also plead you help me on the investment part of the business, You have a free hand of operation. I will like you to send to me your telephone so that i will discuss with you in person so that i will send the name of the security firm to open contact with them for withdrawl of the consignment to move it to your country for investment. . The money is in the position of a security company as a family tresure. A legal process will take place to ensure mutual transfer. . All effort made to the successful of this transaction will highly be appreciated. I hope to get a favourable reply in due curse. We can negotiate on the terms of assistance. Best regards, Miss Mariam Ibrahim mariamibrahim1112@yahoo.fr