# Drone Aerodynamics - Mesh Refinement

**URL:** <https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516>\
**Category:** Project Support\
**Created:** [August 24, 2017, 5:04pm UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516 "2017-08-24T17:04:02Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sbasiima](https://www.simscale.com/forum/user_avatar/www.simscale.com/sbasiima/32/15451_2.png) [@sbasiima](https://www.simscale.com/forum/u/sbasiima)\
**Post date:** [August 24, 2017, 5:04pm UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516/1 "2017-08-24T17:04:03Z")

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Hi everyone,  
Am working drone aerodynamics and am creating a mesh. Am almost through with mesh refinements, but am stuck at the refine surfaces. i can’t find a box to tick so as to assign volumes. Pliz help.

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 ![](https://www.simscale.com/forum/uploads/default/original/2X/d/df2d48842ea230fad976097c0bf3b74e22732462.png)

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**Author:** ![jousefm](https://www.simscale.com/forum/user_avatar/www.simscale.com/jousefm/32/34908_2.png) [@jousefm](https://www.simscale.com/forum/u/jousefm)\
**Post date:** [August 24, 2017, 8:37pm UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516/2 "2017-08-24T20:37:32Z")

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Hi @sbasiima!

Not sure if I got your question but did you search the button shown in the picture below?

 ![](https://www.simscale.com/forum/uploads/default/original/2X/a/aa12ebf8cd8afe387b07e71fe27fc913eb5f27ad.png)

Let me know if that was what you were looking for!

Cheers,

Jousef

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**Author:** ![sbasiima](https://www.simscale.com/forum/user_avatar/www.simscale.com/sbasiima/32/15451_2.png) [@sbasiima](https://www.simscale.com/forum/u/sbasiima)\
**Post date:** [August 25, 2017, 9:35am UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516/3 "2017-08-25T09:35:34Z")

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Hi Jousefm,  
Thanks for replying. I did what you told me but there is no response. I want to assign 0 volumes for my mesh refinement drone 1 but i can’t trace that function. That is what i have been asking of you. Some of the functions on my page are different from the tutorial for example instead of snappy hex mesh, i have hex dominant parametric. So in the place of mesh refinements, where i have to assign volumes to zero, there is nothing just a delete button as you can see in the screen shot.

 ![](https://www.simscale.com/forum/uploads/default/original/2X/d/df2d48842ea230fad976097c0bf3b74e22732462.png)  
I hope you do understand coz i have been stuck since yesterday.

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**Author:** ![anon71131797](https://www.simscale.com/forum/letter_avatar/anon71131797/32/5_5575768a8748004e209b776fc1b2916d.png) [@anon71131797](https://www.simscale.com/forum/u/anon71131797)\
**Post date:** [August 25, 2017, 3:16pm UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516/4 "2017-08-25T15:16:59Z")

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Hi @sbasiima!  
The simplest way for you to assign it is to select the solid directly from **Scene** List

 ![](https://www.simscale.com/forum/uploads/default/original/2X/0/0259166e201c01f5bc5577b4d8175cf79fb31bb2.png)  
I hope this answers your doubt.  
Cheers!

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**Author:** ![sbasiima](https://www.simscale.com/forum/user_avatar/www.simscale.com/sbasiima/32/15451_2.png) [@sbasiima](https://www.simscale.com/forum/u/sbasiima)\
**Post date:** [September 10, 2017, 1:38pm UTC](https://www.simscale.com/forum/t/drone-aerodynamics-mesh-refinement/78516/5 "2017-09-10T13:38:43Z")

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Great Thanks Zinan , IT WORKED