# plottting tangnetial and axial velocity vectors on a plane

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 March 21, 2017, 15:18 plottting tangnetial and axial velocity vectors on a plane #1 Senior Member   Shamoon Jamshed Join Date: Apr 2009 Location: Karachi Posts: 348 Rep Power: 16 Hello all, I am simulating a rotational flow in a pipe whose flow velocity was specified as axial, radial and tangential with axial being the direction of flow in z direction in Fluent. In Tecplot ----------- Now when I take this geometry I want to see velocity vectors on plane. Here I do not see radial axial or tangential rather u, v , w as velocity components. Q1: Do I need to change u,v, w from x,y and z components to w,v,u b/c my z velocity (w-component) is in axial direction. Does tecplot sense z direction as axial by default ? Q2. Do I need to define in specify equations and write explicitly the equations for axial , radial and tangential velocities?

 December 1, 2017, 14:41 #2 Senior Member   Shamoon Jamshed Join Date: Apr 2009 Location: Karachi Posts: 348 Rep Power: 16 Any response please?

 December 4, 2017, 14:55 #3 Member   Join Date: May 2013 Posts: 61 Rep Power: 11 At this point Tecplot does not support direct cylindrical plotting for either spatial or vector coordinates. As such everything must be defined by X,Y,Z and U,V,W. As long as you have defined X,Y,Z as your spacial coordinates (in Plot>Assign XYZ) you should correspondingly define U,V,W as your vector variables (see Plot>Vector>Variables). Assuming you are interested in vectors on a slice or an existing surface zone, you can use U,V,Wthe either use the default representation or select "Tangent Vectors" (Slice Details>Vectors page or Zone Style>Vectors page) which will show only the tangent component of the vector. If you only have axial, radial and tangential velocities defined in your input file you will have to use Data>Alter>Specify Equations to calculate U,V and W using the standard conversion equations. And no, Tecplot cannot detect any axial direction by default so that we can be as process neutral as possible. If you have any followup questions feel free to contact Tecplot support at support@tecplot.com -Devon Simpson Tecplot Technical Product Manager