# Questions about whether modified ABL can be used

**URL:** <https://discourse.mcneel.com/t/questions-about-whether-modified-abl-can-be-used/203455>\
**Category:** Eddy3D\
**Tags:** windows\
**Created:** [April 23, 2025, 6:25am UTC](https://discourse.mcneel.com/t/questions-about-whether-modified-abl-can-be-used/203455 "2025-04-23T06:25:09Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yoonjung\_Jang](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/yoonjung_jang/32/650197_2.png) [@Yoonjung\_Jang](https://discourse.mcneel.com/u/Yoonjung_Jang)\
**Post date:** [April 23, 2025, 6:25am UTC](https://discourse.mcneel.com/t/questions-about-whether-modified-abl-can-be-used/203455/1 "2025-04-23T06:25:09Z")

</div>

Hi.

I want to use Eddy3D to calculate the wind pressure coefficient of a building envelope and use the calculated wind pressure coefficient as input to ‘Energyplus-airflownetwork’.

At this point, the basic equation for calculating the wind speed by height in ABL in Eddy3D and the equation for calculating the wind speed by height used in ‘Energyplus-airflownetwork’ are different.

The equation used to calculate wind speed by height in ‘Energyplus-Airflownetwork’ is as follows

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/3/4/5/3453970be8e2aff461f28d4c6b6e25f8057900cc.jpeg)

I want to use the wind speed by height calculation formula used in Energyplus - airflownetwork in the ABL settings in Eddy3D.

Is there any way to change the ABL wind speed formula in Eddy3D and use it? Or is there a way to import an excel or txt file with wind speed data by height and use it as ABL, like in the following example?

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/a/1/8/a18356371333fe80afdacbef0ed9d050fb33d2cc.png)

Additionally, I would like to know where I can check the wind speed by height generated by ABL.

Best regards.