CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent UDF and Scheme Programming

UDF for ABL turbulent intensity

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   April 19, 2022, 18:29
Default UDF for ABL turbulent intensity
New Member
Join Date: Mar 2021
Posts: 6
Rep Power: 4
monali2015m is on a distinguished road
Atmospheric boundary layer (ABL)validation case:

I wrote the UDF for all the profiles, and I am stuck at the turbulent intensity
I don't know how to interpolate the following wind tunnel information given by the author any advice?
the author used turbulent kinetic energy based on the mean velocity profile and the measured turbulence intensity as follows:

- The turbulent kinetic energy formula used is k=a*(Uref*I)^2
where a is a constant from 0.5 to 1.5, I turbulent intensity (figure 1)

- the wind tunnel has a reference turbulent intensity of 10% at building height, a turbulent intensity of 17% near the ground (12mm), and 5% at gradient height (728mm).
monali2015m is offline   Reply With Quote


atmospheric bl, turbulent intensity, turbulent kinetic energy, udf

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to calculate Turbulent Intensity? prem FLUENT 10 September 29, 2018 09:46
value of turbulent intensity at inlet eng.abdul NUMECA 11 February 1, 2018 03:09
Turbulent Length Scale and Intensity for Airfoil shamim STAR-CCM+ 2 July 12, 2017 23:11
Question regarding Reynolds Number and Turbulent Intensity maxj Main CFD Forum 4 March 5, 2013 06:16
Turbulent Viscosity UDF Raphael FLUENT 2 January 23, 2006 04:04

All times are GMT -4. The time now is 01:28.