# Streamlines in 3D

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 October 5, 2000, 08:07 Streamlines in 3D #1 SugIn Guest   Posts: n/a I don't get streamlines as an option when I use a 3D model. It works fine with the 2D model.

 October 5, 2000, 08:31 Re: Streamlines in 3D #2 Rüdiger Schwarze Guest   Posts: n/a The stream function is only defined in 2 d flows.

 October 5, 2000, 08:38 Re: Streamlines in 3D #3 Pierluigi Allegro Guest   Posts: n/a The stream function is only defined in 2 d flows, in 3d you have pathlines.

 October 9, 2000, 02:22 Re: Streamlines in 3D #4 Whitaker Guest   Posts: n/a When dealing with 3D probelms, people usually use the "path lines" under the "define" option to visulize the flow fields because the streamfunction defined in 3D space is a vector and can't be visulized as it's in 2D region.

 October 10, 2000, 14:51 Re: Streamlines in 3D #5 m.girgis Guest   Posts: n/a The streamlines are the locus of the tangent of teh Velocity vector. They usually defined using the potential function which is derived using 2d analysis. So, if You want to define them in 3d problem, You have to define the planer streamlines in the three Planes (x-y, y-z and z-x) and then add them victorially. You get then the locus of the thengent of spatial (whole) velocity vector. The path lines are the pathes which the Fluid particle take during flowing in the Domain.

 July 10, 2009, 03:13 #6 New Member   Mrt Join Date: Mar 2009 Posts: 21 Rep Power: 9 Murat I also have same problem. I tried pathlines to see the flow trajectory but regarding the huge number of elements in domain, computer gets stuck and then I reboot it. How can I create streamline in 3D, how can I create three plane and add them to see the tangent velocity vectors? Thanks, Murat

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