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Built-in variables
Posted Aug 4, 2017, 6:59 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Parameters, Variables, & Functions, Results & Visualization Version 5.3 0 Replies
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I am currently having problems when trying to plot shear stress on a line and on a slice plot in my 3D model.
When plotting along an edge in the geometry, I can select spf.T_stressy under Laminar flow, Auxiliary variables, Total stress from the drop down list of variables. However, when I try the same thing for a slice plot I am unable to select this variable (it doesn't appear in the list). I don't know why this happens and am wondering if someone can shed some light on the matter?
The way I've been getting around this problem is to use spf.mu*spf.sr for the slice plot, which I believe is the viscosity multiplied by the shear rate. This works but only plots the magnitude of the shear stress and when I compare values from the line plot with the slice plot the numbers do not match up in the way that they should.
It would be helpful to understand how exactly the built-in variables are defined and so far I have been unable to find any detailed information on this so if anyone could help explain these then that would be great.
Thanks.
Hello Lauren Hyndman
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