[blockMesh] With changing the origin of my geometry, I'm not getting the same Results

mkjmalik · September 4, 2020, 11:11

Hi All,

I'm working on this project for months. I'm using Multi-phase, InterFoam, WaterChannel case.

Openfoam Version 5.0

My problem is that in the beginning, my origin in the blockmeshDict was left corner of Branch Channel & when i got my solution converged, I changed the origin in the blockMeshDict according to the paper i was following. But with changing this origin I'm not getting the same results at outlet as i got with the first blockMeshDict file. All my other files are same.

My files are attached below with more description.

InkedFirstCase_LI.jpg

This is my first case as you can see here, the value near the outlet and my origin shown with arrow.

Inked2ndCase_LI.jpg

This is my 2nd case, Remember that I'm using same BC's , Nothing changed except this origin. Similarly Velocity also varies.

blockmeshDict files.zip

Here are my Both blockMeshDict files.

I was looking for this problem on this forum & as well as i googled but i couldn't find the answer. I'm looking for someone who can help me in this regard or atleast give me some suggestions.

Any help would be deeply appreciated.
Thanks

Regards.

mkjmalik · September 24, 2020, 19:26

Please any expert,
I want to know why this happening?

Any help would be deeply Appreciated,I will be very thankful

Thanks
Regards

geth03 · September 30, 2020, 02:59

i checked your geometries,
they are exact the same.

it shouldn't be a geometry issue imo.

can you upload your g-file in the constant-dict?

mkjmalik · September 30, 2020, 07:39

Thanks for your reply..

These are my g files.

g1 is a file of first case, & g2 is a file of 2nd case.

btw both are same.

mm.zip

geth03 · September 30, 2020, 08:43

i see, my first suspicion was that maybe gravity is not chosen in the right direction, but that looks fine.

if everything else is the same, i don't really know why the result is not the same.

btw what are you showing in the two pictures. you didn't write any title, so i don't really know what i am looking at.

mkjmalik · September 30, 2020, 10:57

This is depth of water in meters

mkjmalik · September 30, 2020, 13:58

Hi Geth..

i also made changes in setFieldsDict, but i don't think that the error is because of these files
Here are my files,

New folder.zip

setFields1 is of 1st case

setFields2 is of 2nd case.

geth03 · October 2, 2020, 07:40

i can't comment on that i don't have access to your data,
so i don't know what the void fraction looks like in both
domains after executing setFields.

can you post pics of both in the 0-time after executing setFields?

September 4, 2020, 11:11	With changing the origin of my geometry, I'm not getting the same Results	#1
mkjmalik Member Muhammad Kashif Jawad Join Date: Oct 2019 Location: Pakistan Posts: 48 Rep Power: 5	Hi All, I'm working on this project for months. I'm using Multi-phase, InterFoam, WaterChannel case. Openfoam Version 5.0 My problem is that in the beginning, my origin in the blockmeshDict was left corner of Branch Channel & when i got my solution converged, I changed the origin in the blockMeshDict according to the paper i was following. But with changing this origin I'm not getting the same results at outlet as i got with the first blockMeshDict file. All my other files are same. My files are attached below with more description. InkedFirstCase_LI.jpg This is my first case as you can see here, the value near the outlet and my origin shown with arrow. Inked2ndCase_LI.jpg This is my 2nd case, Remember that I'm using same BC's , Nothing changed except this origin. Similarly Velocity also varies. blockmeshDict files.zip Here are my Both blockMeshDict files. I was looking for this problem on this forum & as well as i googled but i couldn't find the answer. I'm looking for someone who can help me in this regard or atleast give me some suggestions. Any help would be deeply appreciated. Thanks Regards. Last edited by mkjmalik; September 4, 2020 at 12:06. Reason: Mistakenly uploaded wrong files first time

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to set periodic boundary conditions	Ganesh	FLUENT	15	November 18, 2020 06:09
[ANSYS Meshing] 2D mesh from a 3D geometry results in 1m thick mesh	herrolsen	ANSYS Meshing & Geometry	2	March 26, 2019 15:00
Can i get results of 800m600m100m box geometry?	pcbaliwal	FLUENT	2	April 3, 2017 00:33
[snappyHexMesh] different sHM results on same geometry when everythin is in one or several stl-files.	Laika	OpenFOAM Meshing & Mesh Conversion	1	September 8, 2016 04:09
[waves2Foam] trying to modify the waveFlume tutorial by changing the geometry and inlet	Dmitrjs	OpenFOAM Community Contributions	1	July 9, 2014 16:53

September 24, 2020, 19:26		#2
mkjmalik Member Muhammad Kashif Jawad Join Date: Oct 2019 Location: Pakistan Posts: 48 Rep Power: 5	Please any expert, I want to know why this happening? Any help would be deeply Appreciated,I will be very thankful Thanks Regards

September 30, 2020, 02:59		#3
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 355 Rep Power: 8	i checked your geometries, they are exact the same. it shouldn't be a geometry issue imo. can you upload your g-file in the constant-dict?

September 30, 2020, 07:39		#4
mkjmalik Member Muhammad Kashif Jawad Join Date: Oct 2019 Location: Pakistan Posts: 48 Rep Power: 5	Thanks for your reply.. These are my g files. g1 is a file of first case, & g2 is a file of 2nd case. btw both are same. mm.zip

September 30, 2020, 08:43		#5
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 355 Rep Power: 8	i see, my first suspicion was that maybe gravity is not chosen in the right direction, but that looks fine. if everything else is the same, i don't really know why the result is not the same. btw what are you showing in the two pictures. you didn't write any title, so i don't really know what i am looking at.

September 30, 2020, 10:57		#6
mkjmalik Member Muhammad Kashif Jawad Join Date: Oct 2019 Location: Pakistan Posts: 48 Rep Power: 5	This is depth of water in meters

September 30, 2020, 13:58		#7
mkjmalik Member Muhammad Kashif Jawad Join Date: Oct 2019 Location: Pakistan Posts: 48 Rep Power: 5	Hi Geth.. i also made changes in setFieldsDict, but i don't think that the error is because of these files Here are my files, New folder.zip setFields1 is of 1st case setFields2 is of 2nd case.

October 2, 2020, 07:40		#8
geth03 Senior Member Join Date: Dec 2019 Location: Cologne, Germany Posts: 355 Rep Power: 8	i can't comment on that i don't have access to your data, so i don't know what the void fraction looks like in both domains after executing setFields. can you post pics of both in the 0-time after executing setFields?