[sebastian_vogl]

Hi Hamed,

in my point of view dieselFoam seams to be a good choice for your problem, as far as I can understand your case.
This solver uses the Euler-Lagrange model for two phase flows, which means that the spray is represented by parcels.
If you use VTK files to to visualize your simulation, you should have a look for a folder "Lagrangian" or "defaultCloud". You need to include this in paraFoam for your visualization. It is definitely possible to see the particles in paraFoam.
You can also find the particles if you go into any time folder of your simulation and look for an folder "lagrangian" and in that there is a folder "defaultcloud". If you go into these, you will find the position, temperature, etc. of every parcel in the domain. These folders are the basis for the visualization.
If you want to understand the settings, which you have to make in a case when using dieselFoam, have a look at the following page, created by Mr Nordin:
http://openfoamwiki.net/index.php/Contrib_dieselFoam

The solver allows you to choose an evaporation model, which is appropriate for your situation, and the break up models.

I hope I could help you a little bit. If you have got further questions, feel free to ask.

Best regards,
Sebastian

[haghajani]

Hi Sebastian,
Thanks for your kind reply,
After running Aachenbomb case and using foamToVTK and opening the converted data ".../aachenbomb/VTK/lagrangian/defaultCloud" , in paraFoam3.3.0, I found a file "defaultCloud_..vtk", containing many other ".vtk" files. After clicking to open each of them, as you mentioned, some data will be added to "Data Arrays" of "Information" in "Object Inspector" bar. i.e, values for d, tTurb, m,..., n, Uturb, U. But I couldn't see any "C7H16 Liquid Jet" stream or even "C7H16 Droplet" distribution, using Filters as Glyph, Stream Tracer and Clip. (?if these or any other Filter need some settings please let me know?) Although, I could see values of C7H16 (I don't know if it is mass fraction Liquid or evaporated C7H16),Temp,...,U in ".../aachenBomb/VTK/aachenBomb_..vtk, in each desired time step.

I tried to follow >> You can also find the particles if you go ...<<, but couldn't find find the proper "reader", among ParaFoam suggested ones. :-(
I read the suggested page, thanks for that, but still, I do not understand how the "nparcel" really affects the solution? Does it have any relation with number of droplets in system?

To define a continuous mass flow rate at inlet during a period of time, should it be like;
massFlowRateProfile
(
(0 0.12)
(0.005 0.12)
);
By that, I meant, between time 0 to 0.005, a uniform mass flow rate of 0.12 Kg/s is coming to the domain from the orifice (d = 0.005 to 0.01). Am I in right way?

Thank you in advance,
Hamed

[lara_areis]

Dear all

Can anybody explain me what is this "Added gas mass" in the description below ? and what controls it?

Number of parcels in system | 0
Injected liquid mass....... | 0 mg
Liquid Mass in system...... | 0 mg
SMD, Dmax.................. | 0 mu, 0 mu
Added gas mass = -2.27904e+10 mg
Evaporation Continuity Error| -2.27904e+10 mg


thank you in advance

Lara Aleluia Reis

[niklas]

Since you dont use the spray, I would just ignore those numbers.

And they are only valid for closed volumes.

Added gas mass is the injected mass minus the liquid mass in the domain.

[sebastian_vogl]

Hi Hamed,

For making the parcels, which represent the spray, visible you need to apply the Glyph filter to the lagrangian_VTK file after having uploaded it in parafoam.
Do it the following way:
-Open Parafoam
-click on File->open, open the folder VTK and upload the main VTK file, which has the name of your case, and click "apply".
-click again on File->open and open the folder lagrangian, which is in the VTK folder.
-apply the Glyph filter to the lagrangian VTK file and click "apply".
-Click on the register "display" of this filter and choose as "colored by" the diameter of the droplets
-Go back to the register "Properties" and set:
scalar: d
(Vector is not importaint now)
Glyphtype: Sphere
Scale mode: scalar
Set Scale Factor: maybe 1 or 2 (is a kind of zoom factor to make the droplets appear smaller or bigger)
Maximum number of points: If your spray consists of 10000 droplets use 10000

Then you should be able to see the droplets in your domain. There is no such file like "C7H16 Liquid Jet" or "C7H16 Droplet". The droplets in the lagrangian folder are your spray.


Some comments to the massflowRate Profile:
The first entry in the round brackets is the point of time in units seconds. The second entry is indeed a mass flow in units kg/s.
For understanding this mass flow rate profile take a piece of paper and a pencil. Draw an horizontal axis for the time and a vertical axis for the mass flow with units kg/s. Now, for your example, at time 0s you mark the value 0.12kg/s in the diagram and also for the time 0.005s mark the same value. As the solver interpolates linearly between these two reference values for all time steps between 0s and 0.005s you can connect both points in your diagram with a straight line. In your case you will have a rectangle, which represents the constant mass flow rate. The area under your function, which is the area of the rectangle, is the integration of the mass flow rate over time. This is the total mass you injected between 0s and 0.005s. You must make sure that this total mass is exactly the amount of mass you specified under the item "mass" in the injectorProperties file.
Your way to build up the mass flow rate profile should be to first specify the injection time (if it is the important value) and then multiply it with the mass flow rate. In your case 0.12kg/s * (0.005s-0s) = 0.0006kg. This is the mass you should specify in the injectorProperties file. If you want to inject more liquid you ether increase the injection time or the mass flow rate. But I guess you don't want the latter thing. So if your wish is to have a constant mass flow rate of 0.12kg/s then you first make sure how long your injection time is supposed to be and by multiplying it with the flow rate, as I just showed you, you receive the mass you will inject in the system.
If your mass, which you want to inject, is the important parameter and not the injection time, divide the total mass through your mass flow rate of 0.12k/s and you can see how long your injection time is allowed to be.
This value you have write in the injectorProperties file to the item "mass".

I cannot say, whether your total mass flow rate profile is correct, as I don't know how much mass you injected. But I think you can now find out yourself, whether your file is correct. If not, write me!

@Lara: I think the added gas mass is the mass of gas which was introduced to the continuous phase by evaporation of the droplets. In my simulation it is always a very small value of the order of 1e-10mg.

Best regards,
Sebastian

[haghajani]

Dear Sebastian,

Thanks for your kind support;

By visualizing the parcels, Thank you again, I've got some insight into dieselfoam. Now I see the parcels.
Regarding your comprehensive description on massflowrate, I have also set the mass to 6e-4kg, then I have no more anxiety on its asymptotic behaviour during spray.

Best wishes,
Hamed

[haghajani]

Hi,
Is it possible to, don't use spray in dieselFoam (How to set spray-off? then, How we can define that the state of entry is liquid, not gas,?)?, just to study the spill of a liquid jet and study the probable break-up/atomization effect on the liquid stream.

[haghajani]

Hi everybody
I want to add (Liquid Hydrogen) as a new Liquid in /src/thermophysicalModels/liquids.

To follow the instruction as http://openfoamwiki.net/index.php/ContribDieselFoamThermophysicalPropertiesLiqui d Properties , I have to provide the required coefficient for calculating rho_,pv_, ..., D_ in respective NSRDS functions. I surfed the web to find "Data Compilation Tables of Properties of Pure Compounds", which may/seems contain useful data to me, but no success! :-(
Would you please let me know, what shall I do, to define this new
liquid properties?

Best regards,
Hamed

[haghajani]

Hi Sebastian,

Finally, I found the Liquid Hydrogen data and the coefficients, and added H2 Library to the existing liquid library of openFoam-1.5 . I tried to compile the new library as http://openfoamwiki.net/index.php/ContribDieselFoamThermophysicalPropertiesLiqui d, but many errors, saying,
...
/user/lib/../lib64/crt1.o: in function `_start`: (.text+0x20): undefined reference to `main'
Make/linux64GccDpOpt/H2O.o: In function `Foam::thermophysicalFunction::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::thermophysicalFunction::typ e() const]+0x3) : undefined reference to `Foam::thermophysicalFunction::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc0::type() const':
H2O.C.text._ZNK4Foam10NSRDSFunction04typeEv[Foam::NSRDSfunc0::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc0::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc1::type() const':
H2O.C.text._ZNK4Foam22NSRDSfunction14typeEv[Foam::NSRDSfunc1::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc1::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc2::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::NSRDSfunc2::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc2::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc4::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::NSRDSfunc4::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc4::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc5::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::NSRDSfunc5::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc5::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc6::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::NSRDSfunc6::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc6::typeName'
Make/linux64GccDpOpt/H2O.o: In function `Foam::NSRDSfunc7::type() const':
H2O.C.text._ZNK4Foam22thermophysicalFunction4typeEv[Foam::NSRDSfunc7::type() const]+0x3): undefined reference to 'Foam::NSRDSfunc7::typeName'
...
Do you know what's the problem?
Best regards,
Hamed

[alexandrepereira]

Hi Foamers

I have been trying to run the aachenBomb tutorial of OpenFOAM-1.5.x with the settings of the tutorial and it crashed with the infamous janafThermo error ( too low temperature ) with ignition on and chemistry on;

So I have changed the laplacian settings from fvSchemes to Gauss linear limited 01, and the enthalpy calculation to Gauss upwind... same thing happens... :-(

janafThermo out of range....

Has anybody got any idea on what can be done to run this tutorial...?

thanks in advance

Best regards

Alex

[alexandrepereira]

Hi Foamers

Solved the issue :

The default maxCo number in controlDict seems to be quite high, leading to a divergence ,janafThermo out of range with quite low temperatures.

In all the runs that i have tried, basic kinetics to full kinetics with combustion on, the maxCo=0.1 led to divergence;

I tried setting the enthalpy calculation in fvSchemes to Gauss upwind, the laplacianSchemes to Gauss limited Linear 01, and the pressure corectors in fvSolution to 4... no avail...

what I did was lowering the maxCo to 0.05... seem that this leeds to a stable calculation...

Now for one last question ( if anyone can answer it ... :-) )

I will try to simulate the spray combustion of a fuel blend of dymethylether and isooctane with dieselEngineFoam with a moving mesh, I will set the inert species to {}, and change the chem.inp to simulate the Zeldovich Kinetics of NO2 formation, as well as the kinetics of soot formation.

This is quite a heavy duty calculation, so I ask you more experienced Foam users of combustion codes, what should be my tentative maxCo for this calculation ( moving mesh, tumble and swirl motions ... ) one order of magnitude lower? about the same value ( 0.05) ?

What would you advise me to use ?

Is there any kind of "rule of thumb" for the selection of maximum Courant number in a simulation like this...?


"Current CFD wisdom" says that one should always avoid Courant numbers of 1 in a simulation, well , 0.1 was not enough for dieselFoam to converge... :-(

Any hints here... ?


Thanks in advance

Alex

[niklas]

You should be able to run with a Co number of 0.1 without any problem.
Im using 0.3 most of the times and it works fine.

The problem...or difficulty with sprays is the timestep used at time of injection.
The timestep is based on the Courant number at previous timestep, so when the injection starts you will have a big biig change in the flow conditions.

If you have a big time step at the start of calculation, you will inject alot of high velocity high density mass that will transfer alot of momentum to the gas. If you also have evaporation, you can cool the gas too much, which will extract too much energy from the gas and lead to negative temperatures.

It is therefore good practise to reduce the timestep just before the injection to give the code a chance to adjust to the high speed liquid jet that is about to enter the domain.

[alexandrepereira]

Hi Niklas

Thanks for the hint :-)

BRGDS

Alex

[alexandrepereira]

Hi Foamers

When i run dieselFoam or engineFoam, in thermophysicalProperties dictionary the inertSpecie is set to N2, meaning that N2 wont be allowed to react ( am i right here... ?) ;

I am currently using the 15 reaction model chem.inp_15.

What keyword must i set in the entry inertSpecie to study Zeldovich kinetics in the combustion process of a Diesel simulation...?

It is possible to do this... is it not... ?

Thanks in advance

Alex

[niklas]

No, of course all species participate in the reactions.

Inert only means that the transport equation wont be solved.

Check YEqn.H

[alexandrepereira]

Thanx a lot Niklas

BRGDS

Alex

[alexandrepereira]

Hi Niklas

Sorry to bother you again...

This is not about dieselFoam... so far so good, I have managed to run the case with all the options available, selection of droplet break up model, type of injector, chemistry kinetics... so far so good.

This is about the simpleEngine tutorial of http://powerlab.fsb.hr/ped/kturbo/Op...neTutorial.tgz

I untared the case and blockmeshed it and ran into the

keyword engineMesh is undefined in dictionary "/home/alex/Desktop/Simul/simpleEngine2/constant/engineGeometry" error, so i changed engineGeometry and added the engineMesh layered; entry

Ran engineFoam again and there was a core dump :

root@iskandhar:/home/alex/Desktop/simpleEngine# engineFoam
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.5 |
| \ / A nd | Web: http://www.OpenFOAM.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/
Exec : engineFoam
Date : Mar 01 2009
Time : 16:32:56
Host : iskandhar
PID : 7376
Case : /home/alex/Desktop/simpleEngine
nProcs : 1

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create engine time

Create mesh for time = -225

Selecting engineMesh layered
*** glibc detected *** engineFoam: munmap_chunk(): invalid pointer: 0x08176a98 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(cfree+0x1bb)[0xb6b5092b]
/root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libstdc++.so.6(_ZdlPv+0x 21)[0xb6d2a051]
/root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libstdc++.so.6(_ZdaPv+0x 1d)[0xb6d2a0ad]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so(_ZNK4Foam13primitiv eMesh22makeCellCentresAndVolsERKNS_5FieldINS_6Vect orIdEEEES6_RS4_RNS1_IdEE+0x4af )[0xb6fa876f]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so(_ZNK4Foam13primitiv eMesh22calcCellCentresAndVolsEv+0x132)[0xb6fa88f2]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so(_ZNK4Foam13primitiv eMesh11cellVolumesEv+0x38)[0xb6fa8a78]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libfiniteVolume.so(_ZNK4Foam6fvMes h1VEv+0xc3)[0xb771fee3]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libfiniteVolume.so(_ZN4Foam6fvMesh C2ERKNS_8IOobjectE+0x7f1)[0xb77426f1]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so(_ZN4Foam10engineMeshC 2ERKNS_8IOobjectE+0x29)[0xb7f3a319]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so(_ZN4Foam17layeredEngi neMeshC1ERKNS_8IOobjectE+0x29)[0xb7f418b9]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so(_ZN4Foam10engineMesh2 9addIOobjectConstructorToTableINS_17layeredEngineM eshEE3NewERKNS_8IOobjectE+0x3a )[0xb7f49c0a]
/root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so(_ZN4Foam10engineMesh3 NewERKNS_8IOobjectE+0x6a6)[0xb7f3f8c6]
engineFoam[0x805e382]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0)[0xb6af9050]
engineFoam(_ZNK4Foam11regIOobject11writeObjectENS_ 8IOstream12streamFormatENS1_13 versionNumberENS1_15compressionTypeE+0xc9)[0x805d9e1]
======= Memory map: ========
08048000-080d8000 r-xp 00000000 08:01 1136587 /root/OpenFOAM/OpenFOAM-1.5/applications/bin/linuxGccDPOpt/engineFoam
080d8000-080d9000 r--p 00090000 08:01 1136587 /root/OpenFOAM/OpenFOAM-1.5/applications/bin/linuxGccDPOpt/engineFoam
080d9000-080da000 rw-p 00091000 08:01 1136587 /root/OpenFOAM/OpenFOAM-1.5/applications/bin/linuxGccDPOpt/engineFoam
080da000-081c2000 rw-p 080da000 00:00 0 [heap]
b61f1000-b61fa000 r-xp 00000000 08:01 12009769 /lib/tls/i686/cmov/libnss_files-2.6.1.so
b61fa000-b61fc000 rw-p 00008000 08:01 12009769 /lib/tls/i686/cmov/libnss_files-2.6.1.so
b6217000-b6219000 rw-p b6217000 00:00 0
b6219000-b621b000 r-xp 00000000 08:01 12009905 /lib/tls/i686/cmov/libutil-2.6.1.so
b621b000-b621d000 rw-p 00001000 08:01 12009905 /lib/tls/i686/cmov/libutil-2.6.1.so
b621d000-b6231000 r-xp 00000000 08:01 12009766 /lib/tls/i686/cmov/libnsl-2.6.1.so
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b62e2000-b62e8000 r-xp 00000000 08:01 1077921 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/liblagrangian.so
b62e8000-b62e9000 r--p 00005000 08:01 1077921 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/liblagrangian.so
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b62ea000-b6359000 r-xp 00000000 08:01 4849986 /root/OpenFOAM/ThirdParty/openmpi-1.2.6/platforms/linuxGccDPOpt/lib/libmpi.so.0. 0.0
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b693e000-b6ad4000 r-xp 00000000 08:01 1077935 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libmeshTools.so
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b6ad9000-b6ae2000 r-xp 00000000 08:01 1622066 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/openmpi-1.2.6/libPstream.so
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b6c51000-b6c52000 rw-p 0000b000 08:01 1917202 /root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libgcc_s.so.1
b6c52000-b6c53000 rw-p b6c52000 00:00 0
b6c53000-b6c76000 r-xp 00000000 08:01 12009764 /lib/tls/i686/cmov/libm-2.6.1.so
b6c76000-b6c78000 rw-p 00023000 08:01 12009764 /lib/tls/i686/cmov/libm-2.6.1.so
b6c78000-b6d56000 r-xp 00000000 08:01 1917222 /root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libstdc++.so.6.0.10
b6d56000-b6d5a000 r--p 000dd000 08:01 1917222 /root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libstdc++.so.6.0.10
b6d5a000-b6d5b000 rw-p 000e1000 08:01 1917222 /root/OpenFOAM/ThirdParty/gcc-4.3.1/platforms/linux/lib/libstdc++.so.6.0.10
b6d5b000-b6d61000 rw-p b6d5b000 00:00 0
b6d61000-b6d63000 r-xp 00000000 08:01 12009763 /lib/tls/i686/cmov/libdl-2.6.1.so
b6d63000-b6d65000 rw-p 00001000 08:01 12009763 /lib/tls/i686/cmov/libdl-2.6.1.so
b6d6c000-b6d74000 r-xp 00000000 08:01 12009771 /lib/tls/i686/cmov/libnss_nis-2.6.1.so
b6d74000-b6d76000 rw-p 00007000 08:01 12009771 /lib/tls/i686/cmov/libnss_nis-2.6.1.so
b6d76000-b6d7d000 r-xp 00000000 08:01 12009767 /lib/tls/i686/cmov/libnss_compat-2.6.1.so
b6d7d000-b6d7f000 rw-p 00006000 08:01 12009767 /lib/tls/i686/cmov/libnss_compat-2.6.1.so
b6d7f000-b6d80000 rw-p b6d7f000 00:00 0
b6d80000-b7121000 r-xp 00000000 08:01 1077976 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so
b7121000-b712b000 r--p 003a0000 08:01 1077976 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so
b712b000-b712e000 rw-p 003aa000 08:01 1077976 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libOpenFOAM.so
b712e000-b7132000 rw-p b712e000 00:00 0
b7132000-b7159000 r-xp 00000000 08:01 1077969 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/liblaminarFlameSpeedModels.so
b7159000-b715a000 r--p 00026000 08:01 1077969 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/liblaminarFlameSpeedModels.so
b715a000-b715b000 rw-p 00027000 08:01 1077969 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/liblaminarFlameSpeedModels.so
b715b000-b715c000 rw-p b715b000 00:00 0
b715c000-b719c000 r-xp 00000000 08:01 1077929 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libspecie.so
b719c000-b719d000 r--p 00040000 08:01 1077929 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libspecie.so
b719d000-b719e000 rw-p 00041000 08:01 1077929 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libspecie.so
b719e000-b7319000 r-xp 00000000 08:01 1077930 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcombustionThermophysicalModels. so
b7319000-b731c000 r--p 0017a000 08:01 1077930 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcombustionThermophysicalModels. so
b731c000-b731d000 rw-p 0017d000 08:01 1077930 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcombustionThermophysicalModels. so
b731d000-b7363000 r-xp 00000000 08:01 1077939 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libbasicThermophysicalModels.so
b7363000-b7364000 r--p 00046000 08:01 1077939 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libbasicThermophysicalModels.so
b7364000-b7365000 rw-p 00047000 08:01 1077939 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libbasicThermophysicalModels.so
b7365000-b74e3000 r-xp 00000000 08:01 1077931 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcompressibleRASModels.so
b74e3000-b74e5000 r--p 0017e000 08:01 1077931 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcompressibleRASModels.so
b74e5000-b74e7000 rw-p 00180000 08:01 1077931 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libcompressibleRASModels.so
b74e7000-b7ef3000 r-xp 00000000 08:01 1077926 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libfiniteVolume.so
b7ef3000-b7f0f000 r--p 00a0b000 08:01 1077926 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libfiniteVolume.so
b7f0f000-b7f13000 rw-p 00a27000 08:01 1077926 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libfiniteVolume.so
b7f13000-b7f18000 rw-p b7f13000 00:00 0
b7f18000-b7f5a000 r-xp 00000000 08:01 1077934 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so
b7f5a000-b7f5b000 r--p 00042000 08:01 1077934 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so
b7f5b000-b7f5c000 rw-p 00043000 08:01 1077934 /root/OpenFOAM/OpenFOAM-1.5/lib/linuxGccDPOpt/libengine.so
b7f5c000-b7f5e000 rw-p b7f5c000 00:00 0
b7f5e000-b7f78000 r-xp 00000000 08:01 12009494 /lib/ld-2.6.1.so
b7f78000-b7f7a000 rw-p 00019000 08:01 12009494 /lib/ld-2.6.1.so
bf937000-bf94c000 rw-p bf937000 00:00 0 [stack]
ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
Aborted (core dumped)

I am using OpenFOAM-1.5

What do you suggest me to change in the case setup before trying to run this...?

You see, I am trying to set up a simulation of a free piston HCCI working on Dymethyl Ether in OpenFOAM...

I must first understand how do the mesh modifiers in engineFoam work before trying to set up an anarmonic periodic motion of the piston ( as it happens in a free piston engine ) in my case...

Could you help me setup the simpleEngineTutorial... ?

Thanks in advance

Alex

[haghajani]

hi all,
when I reduce the internal pressure of domain to 1e+5 in liquid hydrogen spray into aachenbomb case, it gives a message of Maximum number of iterations exceeded#0; I reduced pressure from 5e+6 step by step, this error appeared from the pressure 1e+6.

What would be your suggestion, to this error,
Thanks in advance,
Hamed

[haghajani]

I also, changed a lot with maxIter_, and the tolerance in system/fvSolution;

[rrschor]

Hi,

I'm trying to solve the aachenBomb for lower temperatures (T0 = 400) with chemistry off. And for some reason the temperature is drooping to fast.

I tried to use adjustable time step with masCo=0.01 and with larger number of parcels too.

Does someone have an clue for my problem?

PS: I also changed this data in injectorProperties

unitInjectorProps
{
position (0 0.0995 0);
direction (0 -1 0);
diameter 0.00056;
Cd 0.75;
mass 1.8975e-05;
nParcels 500000;

X
(
1.0
);

massFlowRateProfile
(
(0.0 1)
(0.0015 1)
);

temperatureProfile
(
(0.0 320.0)
(0.0015 320.0)
);