Can we plot u-plus (U/Utao) Vs y-plus (Y/Ytao) plot for a turbulence model in ANSYS-Fluent post processing? Basically, I want to be ensure that the model will take into account the gradients in the viscous sublayer.
Hi Somenath, It should be possible with ANSYS as I have made it possible in STARCCM+ for my flat plate simulations. I will let you know the procedure in STARCCM+ and probably the same steps can be followed in ANSYS too.
1. Make a line probe where vertical measurements can be taken at the location or position where you want to have U+ vs Y+ plot.
2. Go for an XY plot where Y-axis is U+ and X-axis is a log scale of Y+.
3. Now the input part to this plot should be the earlier line probe.
4. Most of the software has Y+ defined so you just need to recall the expression for Y+ from the software database and assign it on the x-axis.
5. U+ may not be defined in most software. Hence create a custom field scalar function defining U+. (You will get a standard expression for U+ from any Fluid Mechanics Text Book, I follow Frank M White and it has expressions for U+ too).
6. Finally assign this newly defined U+ to the Y-axis.
Hope you too will get the same on ANSYS.
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