[ANSYS Meshing] Inflation layer near inlet

paja123 · January 6, 2016, 15:29

Hi all,
I have question about inflation layer. I created box with cylindrical cut for inlet. How can I deal with inflation layer near the cylindrical cut for inlet?

Thanks.
Paja

Albert G · January 6, 2016, 21:19

Hi
Paja
You can also create inflation layer at the inlet.

hwet · January 6, 2016, 22:43

Since inlet is not a wall, it should not have an inflation by the way

paja123 · January 7, 2016, 18:21

Thank you for your replies! So, please do you have another idea, tips or tricks how I should care about the inflation layer near this inlet?

Any advice more than welcome!

Thanks Paja

hwet · January 7, 2016, 20:34

There are a lot of tutorials available for meshing. Go to the Ansys portal and download them.

paja123 · January 14, 2016, 12:20

I read tutorials but unfortunatelly didnt find there what i am looking for.
i think only way how to solve this problem is to used inflation layers even at my inlet, but probably it is not totally correct, but will it has some bad influence on my model? I think it should not because inflation is just using finer mesh cells, am I right?
Thanks!

hwet · January 14, 2016, 19:15

I am not sure, typically you shouldn't have inflation at the inlet.

Inflation cells are aligned with the wall. If you place them at the inlet, the flow will be going through the inflation cells in perpendicular rather than parallel which might have an adverse affect.

The only way to find out is try using both the ways.

Maybe you should post the picture of your full geometry. Also if i was use i would think of extending the inlet outside my actual geometry so the flow builds up before getting into the system. goodluck

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
definitions of prism layer and inflation layer	aja1345	FLUENT	1	October 26, 2015 12:49
specifying inlet bd layer velocity profile	Martis	STAR-CCM+	2	January 18, 2013 15:31
[snappyHexMesh] Boundary layer generation problems	ivan_cozza	OpenFOAM Meshing & Mesh Conversion	0	October 6, 2010 13:47
errors	Fahad	Main CFD Forum	0	March 23, 2004 13:20
length scales at inlet for internal flows	Anne-Marie Giroux	Main CFD Forum	3	July 5, 1999 21:28

January 6, 2016, 21:19		#2
Albert G New Member Ryan Join Date: Dec 2015 Posts: 2 Rep Power: 0	Hi Paja You can also create inflation layer at the inlet.

January 6, 2016, 22:43		#3
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	Since inlet is not a wall, it should not have an inflation by the way

January 7, 2016, 18:21		#4
paja123 New Member Paja Join Date: Dec 2013 Posts: 8 Rep Power: 12	Thank you for your replies! So, please do you have another idea, tips or tricks how I should care about the inflation layer near this inlet? Any advice more than welcome! Thanks Paja

January 7, 2016, 20:34		#5
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	There are a lot of tutorials available for meshing. Go to the Ansys portal and download them.

January 14, 2016, 12:20		#6
paja123 New Member Paja Join Date: Dec 2013 Posts: 8 Rep Power: 12	I read tutorials but unfortunatelly didnt find there what i am looking for. i think only way how to solve this problem is to used inflation layers even at my inlet, but probably it is not totally correct, but will it has some bad influence on my model? I think it should not because inflation is just using finer mesh cells, am I right? Thanks!

January 14, 2016, 19:15		#7
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	I am not sure, typically you shouldn't have inflation at the inlet. Inflation cells are aligned with the wall. If you place them at the inlet, the flow will be going through the inflation cells in perpendicular rather than parallel which might have an adverse affect. The only way to find out is try using both the ways. Maybe you should post the picture of your full geometry. Also if i was use i would think of extending the inlet outside my actual geometry so the flow builds up before getting into the system. goodluck