# Unexpected errors in CL and CD determination

**URL:** <https://www.simscale.com/forum/t/unexpected-errors-in-cl-and-cd-determination/84174>\
**Category:** Project Support\
**Created:** [January 30, 2019, 5:01am UTC](https://www.simscale.com/forum/t/unexpected-errors-in-cl-and-cd-determination/84174 "2019-01-30T05:01:48Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![Get\_Barried](https://www.simscale.com/forum/user_avatar/www.simscale.com/get_barried/32/20599_2.png) [@Get\_Barried](https://www.simscale.com/forum/u/Get_Barried)\
**Post date:** [January 30, 2019, 9:36am UTC](https://www.simscale.com/forum/t/unexpected-errors-in-cl-and-cd-determination/84174/8 "2019-01-30T09:36:08Z")

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Hi @udaych17,

These resources should help you.

-[Y+ theory](https://www.simscale.com/forum/t/what-is-y-yplus/82394)  
-[Y+ application](https://www.simscale.com/forum/t/y-yplus-generate-wall-spacing-for-cfd/82451)

Cheers.

Regards,  
Barry

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