[ICEM] airflow in an annular space between outer and inner pipe

malay · February 20, 2013, 06:05

I need your expertise for my case, I have airflow in an annular space between outer and inner pipe with sudden expansion (inner pipe solid and one part heated and second part unheated. I have problem with interior part for meshing thus as I make blocking for each part and meshing then the interior part remain without mesh. Please can you solve this problem and export the mesh to fluent because some time the fluent give me error such as non-positive volume. Please find the attach file with ICEM

I will appreciate your help and looking forward receiving your communications

Thanking you

htokan · February 20, 2013, 07:23

Quote:

Originally Posted by malay

I need your expertise for my case, I have airflow in an annular space between outer and inner pipe with sudden expansion (inner pipe solid and one part heated and second part unheated. I have problem with interior part for meshing thus as I make blocking for each part and meshing then the interior part remain without mesh. Please can you solve this problem and export the mesh to fluent because some time the fluent give me error such as non-positive volume. Please find the attach file with ICEM

I will appreciate your help and looking forward receiving your communications

Thanking you

I think Mr Simon can help you beacuse he has good experince in icem

Far · February 20, 2013, 09:26

Here you go

malay · February 20, 2013, 13:05

Dear Sir Far,
Firstly, a lot of thanks for you, My dear brother earlier I reached this step from the project but still same problem interior without mesh and also when I import mesh in fluent there is error (non-positive volume) Please I need from you meshing the interior and import the fluent without error (non-positive volume). Finally I need you to write me all the steps you will do it. Please find the attach file involve two picture for my case
I will appreciate your help and looking forward receiving your communications

Thanking you

Yours sincerely

htokan · February 20, 2013, 13:10

Quote:

Originally Posted by malay

Dear Sir Far,
Firstly, a lot of thanks for you, My dear brother earlier I reached this step from the project but still same problem interior without mesh and also when I import mesh in fluent there is error (non-positive volume) Please I need from you meshing the interior and import the fluent without error (non-positive volume). Finally I need you to write me all the steps you will do it. Please find the attach file involve two picture for my case
I will appreciate your help and looking forward receiving your communications

Thanking you

Yours sincerely

I said to you only simon can solve your proplem

kidding

Far · February 20, 2013, 13:17

Ok. You need mesh inside ?

malay · February 20, 2013, 13:24

Quote:

Originally Posted by Far

Ok. You need mesh inside ?

my Dear brother, still interior without mesh. Please see the attach file

Thanking you

diamondx · February 20, 2013, 13:27

Project here :

https://dl.dropbox.com/u/35161486/case.zip

Far · February 20, 2013, 13:32

Hey

You really need mesh in interior (and please don't use the word which is already reserved for some other purpose, it makes confusion )

If you give it boundary (wall) your flow will not flow from this boundary, or if you give it as inlet or outlet it will be mathematically wrong. Trick is " associate face to surface"

I also want to know do you need inside the solid part?

Otherwise mesh is perfectly fine.

malay · February 20, 2013, 13:38

Quote:

Originally Posted by diamondx

Project here :

https://dl.dropbox.com/u/35161486/case.zip

Many thanks Mr. diamondx now I am trying in fluent just waiting me please

malay · February 20, 2013, 13:40

Quote:

Originally Posted by Far

Hey

You really need mesh in interior (and please don't use the word which is already reserved for some other purpose, it makes confusion )

If you give it boundary (wall) your flow will not flow from this boundary, or if you give it as inlet or outlet it will be mathematically wrong. Trick is " associate face to surface"

I also want to know do you need inside the solid part?

Otherwise mesh is perfectly fine.

Dear Mr. Far, air flow between space annular and exit pipe make sudden expansion and interior meaning (fluid) between two entrance and exit pipe

Far · February 20, 2013, 13:46

Quote:

Originally Posted by malay

my Dear brother, still interior without mesh. Please see the attach file

Thanking you

Interior (Fluid) is always without mesh. But you can turn it on if needed.

malay · February 20, 2013, 13:50

Quote:

Originally Posted by diamondx

Project here :

https://dl.dropbox.com/u/35161486/case.zip

Dear Mr. Diamondx Please find the picture I need block around the inner pipe by ogrid beacsue in fluent need to define heat and unheat pipe

Thanking you

malay · February 20, 2013, 14:01

Quote:

Originally Posted by Far

Interior (Fluid) is always without mesh. But you can turn it on if needed.

Please Mr. Far I need Interior part beacsue it has beganing recirculation zone

Thanking you

htokan · February 20, 2013, 14:13

Quote:

Originally Posted by malay

Dear Mr. Diamondx Please find the picture I need block around the inner pipe by ogrid beacsue in fluent need to define heat and unheat pipe

Thanking you

I got your point Please see the picture

diamondx · February 20, 2013, 14:27

You need suface first...

Far · February 20, 2013, 14:45

Quote:

Originally Posted by malay

Dear Mr. Diamondx Please find the picture I need block around the inner pipe by ogrid beacsue in fluent need to define heat and unheat pipe

Thanking you

Do you need blocks around or inside?

Have you gone through ICEM CFD tutorials?

malay · February 20, 2013, 14:47

Quote:

Originally Posted by Far

Do you need blocks around or inside?

Have you gone through ICEM CFD tutorials?

yes bro ....

malay · February 20, 2013, 15:14

Quote:

Originally Posted by diamondx

You need suface first...

Dear Diamondx,
I import the mesh file in fluent and apply boundary condtion but as 3 iteration i got divergance as shown in attach picture

htokan · February 20, 2013, 16:23

I said only Simon he has ability to solve this problem. Where is simon ??we waiting solving....

February 20, 2013, 13:27		#8
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	Project here : https://dl.dropbox.com/u/35161486/case.zip PSYMN, BrolY and malay like this. __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

February 20, 2013, 13:32		#9
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Hey You really need mesh in interior (and please don't use the word which is already reserved for some other purpose, it makes confusion ) If you give it boundary (wall) your flow will not flow from this boundary, or if you give it as inlet or outlet it will be mathematically wrong. Trick is " associate face to surface" I also want to know do you need inside the solid part? Otherwise mesh is perfectly fine. malay likes this.

February 20, 2013, 14:27		#16
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	You need suface first... malay likes this. __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

February 20, 2013, 16:23		#20
htokan New Member htokan Join Date: Jul 2009 Posts: 6 Rep Power: 17	I said only Simon he has ability to solve this problem. Where is simon ??we waiting solving....