[sky1994117k]

I have simulated airflow over a bluff body three-dimensionally by ANSYS FLUENT. I would like to show turbulence intensity in CFD-POST.Although I could find it in the variable lists, but I just want to plot contour of turbulence intensity in x direction.

[NonStopEagle]

Originally Posted by sky1994117k

I have simulated airflow over a bluff body three-dimensionally by ANSYS FLUENT. I would like to show turbulence intensity in CFD-POST.Although I could find it in the variable lists, but I just want to plot contour of turbulence intensity in x direction.

I don't know why you would want to show the turbulent intensity in the x direction only.
Turbulent intensity is a parameter that is defined in a way that it takes velocity fluctuations and mean velocity of all the three directions into consideration.
Now I am supposing that your question is as follows:
1. either you want to calculate the turbulent intensity in the x direction only and plot the contour
Well then you will probably have to define a custom parameter and try to do it.
you can try to define the velocity fluctuations in the following way
fluctuation(velocity in x direction) = (du/dx)*dx (where dx is the cell width in x direction)
as so on for other directions.
As for the mean velocity,
refer these threads
calculate mean velocity components in all cells after some time steps
or
Calculating mean velocity in each cell

I think you'd be better served making a UDF for this.


NonStopEagle

[vinerm]

EVM models, such as, and are called Isotropic turbulence models, i.e., there is an assumption of turbulence intensity being equal in all directions. So, TI is no longer a vector; there is no x-component. If you want that, you have to use RSM or Scale Resolving Simulations, such as, LES.