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-   -   Calculating vortex cores of relative velocities (http://www.cfd-online.com/Forums/tecplot/123720-calculating-vortex-cores-relative-velocities.html)

Dorit September 19, 2013 10:19

Calculating vortex cores of relative velocities
 
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,
Dorit

863864536@qq.com December 17, 2015 06:23

vortex core
 
hello,i have found the same problem that the vortex core is invariant even we change the filed variable,have you found a method?please tell me,thank you!:)


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