CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

c-d nozzle

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 10, 2013, 06:00
Default c-d nozzle
  #1
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
i have made my 2D c-d nozzle geometry in gambit and mess it in openFoam by some command. and it is done.
but when i run this with rhoCentralFoam solver, it gives some error.

--> FOAM FATAL IO ERROR:
keyword e is undefined in dictionary "/home/anshu/OpenFOAM/anshu-2.2.1/run/tutorials/compressible/rhoCentralFoam/cd_1/system/fvSolution.solvers"

file: /home/anshu/OpenFOAM/anshu-2.2.1/run/tutorials/compressible/rhoCentralFoam/cd_1/system/fvSolution.solvers from line 22 to line 38.

From function dictionary::subDict(const word& keyword) const
in file db/dictionary/dictionary.C at line 608.

FOAM exiting

my intial condion for P is like this

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

internalField uniform 101325;

boundaryField
{
inlet
{
type fixedValue;
value uniform 101325;
}

outlet
{
type zeroGradient;
}

axis
{
type symmetryPlane;
}

upperwall
{
type zeroGradient;
}


frontAndBackPlanes
{
type empty;
}
}


please confirm that is it ok with these boundary condition??/


anshul bansal is offline   Reply With Quote

Old   September 10, 2013, 06:05
Default
  #2
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
for high enthalpy flow (around M=6 and temp. 7000K), what numerical scheme i take?
anshul bansal is offline   Reply With Quote

Old   September 11, 2013, 05:15
Default
  #3
Senior Member
 
Artur's Avatar
 
Artur
Join Date: May 2013
Location: Southampton, UK
Posts: 226
Rep Power: 6
Artur is on a distinguished road
For your first problem, you didn't specify how you want to solve for "e" in system/fvSolution.

Have a read through the error message and convince yourself that this is the case, will help you in tracking the error sources in the future.

It should be, for instance, in biconic25-55Run35 tutorial:

Code:
    e
    {
        $U;
        relTol          0.1;
    }
Artur is offline   Reply With Quote

Old   September 12, 2013, 04:38
Default
  #4
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
is my boundary conditions are right?
and what solver should i use?... i use rhoCentralFoam solver(but this is density based solver)
can u suggest some pressure based solver.... and check my boundary condition..
anshul bansal is offline   Reply With Quote

Old   September 12, 2013, 05:15
Default
  #5
Senior Member
 
Artur's Avatar
 
Artur
Join Date: May 2013
Location: Southampton, UK
Posts: 226
Rep Power: 6
Artur is on a distinguished road
I'm afraid I can't help you without knowing what it is that you're trying to calculate exactly so some clarification would definitely help...
Artur is offline   Reply With Quote

Old   September 12, 2013, 05:57
Default
  #6
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
actually i have a c-d nozzle(bell contour). my project about high enthalpy flow. so ii want to simulate a high enthalpy flow through c-d nozzle.
so i made a c-d nozzle(3-d, take 5degree axisymmetry) from gambit and mesh it in openfoam. i check mesh by checkMesh, it is ok.

problem is going on its running through solver.
i have confusion about it's boundary condition and what solver should i take?


i will send you a paper to ur mail id (please send ur mail id) in which my geometry style is given. u just check it and reply me.
anshul bansal is offline   Reply With Quote

Old   September 12, 2013, 06:22
Default
  #7
Senior Member
 
Artur's Avatar
 
Artur
Join Date: May 2013
Location: Southampton, UK
Posts: 226
Rep Power: 6
Artur is on a distinguished road
I'm afraid I have no idea about high enthalpy flows so hopefully someone more capable in this area will answer your post.

All the best and good luck.
Artur is offline   Reply With Quote

Old   September 12, 2013, 06:35
Default
  #8
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
now this time i'm work with simple compressible flow. so first i done this, after i go for high enthalpy flow.
so advice me for simple compressible flow with my geometry.
(nd send ur mail id,so i can send my geometry to u)
anshul bansal is offline   Reply With Quote

Old   September 23, 2013, 05:42
Default
  #9
New Member
 
anshul bansal
Join Date: Jun 2013
Posts: 22
Rep Power: 4
anshul bansal is on a distinguished road
Can any body told me which solver i used for c-d nozzle compressible flow ??
anshul bansal 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
Convergent-Divergent Nozzle with MATLAB Obad Main CFD Forum 7 April 1, 2015 09:11
C-D nozzle supersonic jet boundary Gland FLUENT 4 May 24, 2012 00:25
Sonic flow for exhaust nozzle beanlee999 FLUENT 1 May 10, 2012 14:34
Flow simulation in a Pelton turbine nozzle fivos FLUENT 0 April 19, 2011 11:46
compressible flow in a counterflow nozzle d.vamsidhar FLUENT 0 November 24, 2005 02:45


All times are GMT -4. The time now is 10:12.