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Calculating vortex cores of relative velocities

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Old   September 19, 2013, 10:19
Default Calculating vortex cores of relative velocities
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Hi, I want to use Tecplot to calculate the vortex core behind a wind turbine blade. I'm using a moving reference frame in Fluent to simulate the flow around the turbine blade. When I read the resulting case and data files into Tecplot I first convert the absolute velocities into relative velocities and then apply the new the new variables:

> Data > Alter > Specify Equations: {v_rel_x}=... {v_rel_y}=... {v_rel_z}=...
> Analyze > Field Variables: U={v_rel_x} V={v_rel_y} Z={v_rel_z}

But when I calculate the vortex core Tecplot always calculates it using the absolute velocities and not the relative ones that I specified. Does anyone have an idea of how I can use the velocities that I specified??

Thank you,
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post procesing, relative velocity, tecplot, vortex

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