volume fraction

zryan civil · June 20, 2016, 06:07

what is the reason of this bubbles in water/air volume fraction? as in first image, and in the second image unless the volume fraction 1 is water but itis color not red , it is color is orange.
thanks

http://www.cfd-online.com/Forums/att...1&d=1466413368
http://www.cfd-online.com/Forums/att...1&d=1466413391

ghorrocks · June 20, 2016, 08:20

I have no idea as you have not explained what you are doing.

But they look like rendering artefacts to me.

zryan civil · June 20, 2016, 16:17

Quote:

Originally Posted by ghorrocks

I have no idea as you have not explained what you are doing.

But they look like rendering artefacts to me.

this is modeling of free surface flow, the first image at the location of velocity approach to zero, but the second one at location of high velocity. any way the color must be red because (VF= 1, Water)

ghorrocks · June 20, 2016, 21:51

They look like rendering artefacts to me.

So change the viewing angle and lighting and I suspect you can eliminate them.

June 20, 2016, 08:20		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I have no idea as you have not explained what you are doing. But they look like rendering artefacts to me. zryan civil likes this.

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June 20, 2016, 21:51		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	They look like rendering artefacts to me. So change the viewing angle and lighting and I suspect you can eliminate them.