CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Pre-Processing

setfields utility for liquid jet

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   March 7, 2013, 10:50
Question setfields utility for liquid jet
  #1
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Dear foamers,
Pleaes can any body direct me. I am trying to solve a jet flow problem by using interFoam solver. I have a cuboid and I suppose to implement a jet from above moving dowen along the z-direction. x=0.001,y=0.001,z=0.12...jet diameter=0.0004. I have all the boundaries are walls just the above and lower sides are atmosphere. Can I use setfields utility to implement the liquid phase inside my region and what kind of word code for the shape? is it plaintocell or circuletocell like boxtocell as an example, because I have to start from above in a circle cross section shape with a specific velocity. please any thoughts or advice would help so much.
sandy13 is offline   Reply With Quote

Old   March 8, 2013, 12:06
Default
  #2
Member
 
Davide D.
Join Date: Oct 2012
Location: Birmingham (UK)
Posts: 44
Rep Power: 4
dav.dap83 is on a distinguished road
A possible idea:

1) Divide the top boundary into two patches, i.e. one free and one for the jet (above circle).
2) Set Ugas fixedvalue uniform (0 0 0) and Uliquid fixedvalue uniform <your jet velocity> for the jet patch.
3) alpha = <gas value> for the whole domain. No setfields needed.
dav.dap83 is offline   Reply With Quote

Old   March 11, 2013, 12:10
Default
  #3
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by dav.dap83 View Post
A possible idea:

1) Divide the top boundary into two patches, i.e. one free and one for the jet (above circle).
2) Set Ugas fixedvalue uniform (0 0 0) and Uliquid fixedvalue uniform <your jet velocity> for the jet patch.
3) alpha = <gas value> for the whole domain. No setfields needed.
Dear dav.dap83,
Thank you for your help, I did as you recommended but I faced this error:
FOAM FATAL IO ERROR:
keyword inlet is undefined in dictionary "/home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/p_rgh::boundaryField"

I already defined inlet but I do not what is the problem.. you can take a look below at my p_rgh; , U , alpha1 , alpha. and I wish if you can help me...

.................................................. .................................................. ..............
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p_rgh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [1 -1 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
leftWall
{
type buoyantPressure;
value uniform 0;
}

rightWall
{
type buoyantPressure;
value uniform 0;
}
upperWall
{
type buoyantPressure;
value uniform 0;

atmosphere
{
type totalPressure;
p0 uniform 0;
U U;
phi phi;
rho rho;
psi none;
gamma 1;
value uniform 0;
}

// atmosphere
// {
// type totalPressure;
// p0 uniform 0;
// U U;
// phi phi;
// rho rho;
// psi none;
// gamma 1;
// value uniform 0;
// }

inlet
{
type zeroGradient;
// type buoyantPressure;
// value uniform 0;
}


frontWall
{
type buoyantPressure;
value uniform 0;
}

backWall
{
type buoyantPressure;
value uniform 0;
}

}
.................................................. .................................................. ..............

FoamFile
{
version 2.0;
format ascii;
class volVectorField;
location "0";
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
leftWall
{
type fixedValue;
value uniform (0 0 0);
}
rightWall
{
type fixedValue;
value uniform (0 0 0);
}
frontWall
{
type fixedValue;
value uniform (0 0 0);
}
backWall
{
type fixedValue;
value uniform (0 0 0);
upperWall
{
type fixedValue;
value uniform (0 0 0);
}
inlet
{
type fixedValue;
value uniform (0 0 -3);
}
atmosphere
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
}


// ************************************************** *********************** //

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 0 0 0 0 0 0];

internalField uniform 0;

boundaryField
{
leftWall
{
type zeroGradient;
}

rightWall
{
type zeroGradient;
}

inlet
{
type fixedValue;
value uniform 1
}

atmosphere
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
/ }



// atmosphere
// {
// type zeroGradient;
// }

frontWall
{
type zeroGradient;
}

backWall
{
type zeroGradient;
}
upperWall
{
type zeroGradient;
}

}

// ************************************************** *********************** //

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 0 0 0 0 0 0];

internalField uniform 0;

boundaryField
{
leftWall
{
type zeroGradient;
}

rightWall
{
type zeroGradient;
}
upperWall
{
type zeroGradient;
}

inlet
{
type zeroGradient;
}

atmosphere
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}

// atmosphere
// {
// type zeroGradient;
// }

frontWall
{
type zeroGradient;
}

backWall
{
type zeroGradient;
}

}

// ************************************************** *********************** /

Sandy,
sandy13 is offline   Reply With Quote

Old   March 11, 2013, 12:14
Default
  #4
Member
 
Davide D.
Join Date: Oct 2012
Location: Birmingham (UK)
Posts: 44
Rep Power: 4
dav.dap83 is on a distinguished road
you forgot to close the parenthesis } in p_rgh after upperWall
dav.dap83 is offline   Reply With Quote

Old   March 11, 2013, 13:02
Default
  #5
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by dav.dap83 View Post
you forgot to close the parenthesis } in p_rgh after upperWall
Dear dav.dap83,
Thank you so much, I am so embarrassed, any how I fixed this error but still get another error and I do not why? the error is:

--> FOAM FATAL IO ERROR:

keyword atmosphere is undefined in dictionary "/home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField"

file: /home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField from line 25 to line 64.

If you take a look at my dictionary, I defined atmosphere...
Sandy,
sandy13 is offline   Reply With Quote

Old   March 12, 2013, 07:14
Default
  #6
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by sandy13 View Post
Dear dav.dap83,
Thank you so much, I am so embarrassed, any how I fixed this error but still get another error and I do not why? the error is:

--> FOAM FATAL IO ERROR:

keyword atmosphere is undefined in dictionary "/home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField"

file: /home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField from line 25 to line 64.

If you take a look at my dictionary, I defined atmosphere...
Sandy,
Dear dav.dap83,
Sorry for being obtrusive, but I wanted to ask you, do I need to use topoSetDict like in the nozzleFlow2d tutorial?. I do not what to do, I tried to fix the last error but still get the same one:
--> FOAM FATAL IO ERROR:

keyword atmosphere is undefined in dictionary "/home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField"
Sandy,
sandy13 is offline   Reply With Quote

Old   March 17, 2013, 10:05
Default
  #7
Member
 
Michiel
Join Date: Oct 2010
Location: Delft, Netherlands
Posts: 97
Rep Power: 6
michielm is on a distinguished road
Quote:
Originally Posted by sandy13 View Post
Dear dav.dap83,
Thank you so much, I am so embarrassed, any how I fixed this error but still get another error and I do not why? the error is:

--> FOAM FATAL IO ERROR:

keyword atmosphere is undefined in dictionary "/home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField"

file: /home/atheel/interFoamvalidation/laminar/liquidjetinjector/0/alpha1::boundaryField from line 25 to line 64.

If you take a look at my dictionary, I defined atmosphere...
Sandy,
There is a \ before the closing } of atmosphere in the first dump of alpha you show (why do you have two in your post?!)
michielm is offline   Reply With Quote

Old   April 4, 2013, 08:50
Default no convergence for the liquid jet case
  #8
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by michielm View Post
There is a \ before the closing } of atmosphere in the first dump of alpha you show (why do you have two in your post?!)
Dear michielm,
I am still struggling in my case, I ran my case finally but with out any convergence, I do not know, I used delta T =0.001, Co=0.5 in my control dict., Is that too bad? Or may be because of bad boundary conditions. Would you please help me which is the best boundary condition for a liquid jet and here is my final set of my boundary conditions...
in this link, please have alook at it when ever you have time.
note: 1- I am using interFoam utility for OF 2.1.1.
2- for geometry I used blender to get STL ascii in order to use snappy for my mesh

https://www.dropbox.com/home/openfoam-shear
sandy13 is offline   Reply With Quote

Old   April 4, 2013, 11:18
Default
  #9
Member
 
Michiel
Join Date: Oct 2010
Location: Delft, Netherlands
Posts: 97
Rep Power: 6
michielm is on a distinguished road
Hi Sandy,
I cannot read the dropbox folder because you posted the wrong link (you need to click the 'share link' button of the folder and then 'get link' and copy paste that one in your post)

Just a thought: your deltaT seems high but I cannot judge without details of your mesh and velocities. Co=0.5 is a bit high for interFoam, but should at least give convergent results. Did you set 'adjustTimestep' to 'yes'?! Or is your case running by your deltaT?
michielm is offline   Reply With Quote

Old   April 4, 2013, 11:52
Default
  #10
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by michielm View Post
Hi Sandy,
I cannot read the dropbox folder because you posted the wrong link (you need to click the 'share link' button of the folder and then 'get link' and copy paste that one in your post)

Just a thought: your deltaT seems high but I cannot judge without details of your mesh and velocities. Co=0.5 is a bit high for interFoam, but should at least give convergent results. Did you set 'adjustTimestep' to 'yes'?! Or is your case running by your deltaT?
Dear michielm,
Thank you so much for your replay, I feel so happy when somebody shares me thoughts about OpenFoam because I feel so lonely in this field. Yes I set 'adjustTimestep' to 'yes. Sorry about this little mistake and this is the link for all of my case:
https://www.dropbox.com/sh/ilvn6y9mlkgl3gs/AWqK6vZU4h

Hopefully this time works, If it did not let me know because I am a noob in dropbox as well.
sandy,
sandy13 is offline   Reply With Quote

Old   April 9, 2013, 04:53
Default no convergence for the liquid jet case
  #11
Member
 
sandy
Join Date: Mar 2013
Location: Cardiff, UK
Posts: 71
Rep Power: 4
sandy13 is on a distinguished road
Quote:
Originally Posted by sandy13 View Post
Dear michielm,
Thank you so much for your replay, I feel so happy when somebody shares me thoughts about OpenFoam because I feel so lonely in this field. Yes I set 'adjustTimestep' to 'yes. Sorry about this little mistake and this is the link for all of my case:
https://www.dropbox.com/sh/ilvn6y9mlkgl3gs/AWqK6vZU4h

Hopefully this time works, If it did not let me know because I am a noob in dropbox as well.
sandy,
Dear michielm,
I sent you may case couple days ago, please have a look at it, I have checked every thing, but still I do not get any convergence, may be you will know why. I think it is the boundary conditions but I do not which boundary?...
Sandy,
sandy13 is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Contribution a new utility: refine wall layer mesh based on yPlus field lakeat OpenFOAM Mesh Utilities 57 February 1, 2015 09:25
2D Plane Jet Fluent Solution doug Main CFD Forum 10 October 16, 2013 00:47
Problems with the execution of the setFields utility. foamer OpenFOAM Pre-Processing 5 June 3, 2013 12:24
Jet in Supersonic Crossflow, controlling mass flow rate ChrisA OpenFOAM Running, Solving & CFD 3 November 13, 2012 19:20
IMPINGING JET ........... HELP!!!!!!!! Amir Omoumi Main CFD Forum 10 August 30, 1999 22:11


All times are GMT -4. The time now is 21:35.