Forum: OpenFOAM Running, Solving & CFD
August 6, 2008, 04:43
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Replies: 98
Views: 18,742
Hallo everybody,
I recently
Hallo everybody,
I recently found my mistake on my own. It was as simple as stupid:
I wanted to place 4 injectors in a region of 4mm in x-axis around the central positioned injector. However I...
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Forum: OpenFOAM Running, Solving & CFD
August 5, 2008, 11:13
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Replies: 98
Views: 18,742
Hallo everybody,
I want to
Hallo everybody,
I want to simulate the injection and evaporation of single drops (C7H16) into a fluid (air). The case is pretty similar to what I wrote in my previous posts above. I have got 5...
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Forum: OpenFOAM Running, Solving & CFD
July 15, 2008, 02:54
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Replies: 98
Views: 18,742
The number 0.233 describes the
The number 0.233 describes the amount of O2 which is contained in the air. The rest is N2. The "unit" is:
(mol of O2)/(mol of air).
So it doesn't have units as the mol on both sides of the...
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Forum: OpenFOAM Running, Solving & CFD
July 14, 2008, 11:48
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Replies: 98
Views: 18,742
The dieselFoam solver consists
The dieselFoam solver consists of the following folders:
0, chemkin, constant, system. The "0"-file contains all files that define your initial system properties. There you can vary temperature,...
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Forum: OpenFOAM Running, Solving & CFD
July 14, 2008, 04:18
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Replies: 98
Views: 18,742
Unfortunately I had to realize
Unfortunately I had to realize that the file size is still to big. Would it be all right for you if I sent it you via E-mail?
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Forum: OpenFOAM Running, Solving & CFD
July 14, 2008, 04:12
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Replies: 98
Views: 18,742
So I changed the system proper
So I changed the system properties to Temperatur=300K and pressure=1bar. Furthermore I increased the droplet diameter to 100µm. At first I tried a particle velocity of 100 m/s and then 50 m/s (as in...
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Forum: OpenFOAM Running, Solving & CFD
July 11, 2008, 05:20
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Replies: 98
Views: 18,742
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Forum: OpenFOAM Running, Solving & CFD
July 10, 2008, 10:11
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Replies: 98
Views: 18,742
As I'm not able to compress al
As I'm not able to compress all files of my case to a size that allows posting them here I'm attaching the files which were changed from the aachenbomb tutorial case. All other files remain are...
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Forum: OpenFOAM Running, Solving & CFD
July 9, 2008, 13:44
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Replies: 98
Views: 18,742
I'm sorry, I forgot the video
I'm sorry, I forgot the video of my case. I had to reduce the size dramatically to post it here, but my problems with the droplet behaviour will become clear:
...
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Forum: OpenFOAM Running, Solving & CFD
July 9, 2008, 12:44
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Replies: 98
Views: 18,742
The case ran without any probl
The case ran without any problems. However the flow of the droplets isn't uniform again. The droplets of each injector behave differently and again they have an offset in their flow although I set my...
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Forum: OpenFOAM Running, Solving & CFD
July 9, 2008, 11:37
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Replies: 98
Views: 18,742
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Forum: OpenFOAM Running, Solving & CFD
July 9, 2008, 08:59
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Replies: 98
Views: 18,742
As you anticipated correctly,
As you anticipated correctly, I am back very soon. However, removing the entries didn't solve my problem completely. This time the program says:
Constructing Spray
Selecting injectorType...
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Forum: OpenFOAM Running, Solving & CFD
July 8, 2008, 06:45
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Replies: 98
Views: 18,742
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Forum: OpenFOAM Running, Solving & CFD
July 8, 2008, 04:26
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Replies: 98
Views: 18,742
Hello again,
the last probl
Hello again,
the last problem dealing with the reconstruction of a case is now solved. The problem was not caused by OpenFoam but simply that the disc had no place left for writing the time...
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Forum: OpenFOAM Running, Solving & CFD
July 8, 2008, 03:45
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Replies: 98
Views: 18,742
Hello everyone,
I wanted to
Hello everyone,
I wanted to repeat the case with the incection of 5 parcels in a row. The solution process, which was done on more processors (solution was parallelised), was completed normally...
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Forum: OpenFOAM Running, Solving & CFD
July 7, 2008, 08:29
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Replies: 98
Views: 18,742
Maybe I should mention that th
Maybe I should mention that the velocity of the surrounding air is still 0 m/s and for the drag model the "standartdragModel" is used.
Do you know why our results differ?
Yours,
Sebastian...
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Forum: OpenFOAM Running, Solving & CFD
July 7, 2008, 07:55
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Replies: 98
Views: 18,742
I now implemented your example
I now implemented your example, however with 5 droplets first. There's quite a difference between our results. My droplets dont't flow in a row, as in your video above, but have an offset. Moreover...
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Forum: OpenFOAM Running, Solving & CFD
July 3, 2008, 12:07
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Replies: 98
Views: 18,742
Hallo again,
I implemented
Hallo again,
I implemented the following massFlowProfile as you suggested, Mr Nordin, however the injector either injects the two parcels right from the beginning or I have 4 parcels in my...
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Forum: OpenFOAM Running, Solving & CFD
July 2, 2008, 07:14
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Replies: 98
Views: 18,742
Thank you again Mr Nordin for
Thank you again Mr Nordin for your incredible patience. I think I understood how the massprofile works and will try to implement your example on my own.
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Forum: OpenFOAM Running, Solving & CFD
July 2, 2008, 05:20
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Replies: 98
Views: 18,742
Thank you again!
As I have un
Thank you again!
As I have understood the massFlowRateProfele, the first row of each entry spcifies the points of time for each injection and the second one the mass that should be injected at that...
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Forum: OpenFOAM Running, Solving & CFD
July 1, 2008, 12:13
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Replies: 98
Views: 18,742
When I understood your definit
When I understood your definition of a parcel correctly, Mr Nordin, a parcel represents a part of the total mass injected and can contain a big number of droplets with any size below the nozzle...
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Forum: OpenFOAM Running, Solving & CFD
July 1, 2008, 07:54
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Replies: 98
Views: 18,742
Hello everybody,
Does someb
Hello everybody,
Does somebody know, why the number of parcels in a system can exceed the number which is written in the injectorProperties file, because in a simulation I did I finally had up...
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Forum: OpenFOAM Running, Solving & CFD
June 30, 2008, 10:07
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Replies: 98
Views: 18,742
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Forum: OpenFOAM Running, Solving & CFD
June 30, 2008, 04:39
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Replies: 98
Views: 18,742
Hallo everybody,
In my simu
Hallo everybody,
In my simulation, I tried to calculate the evaporation of a single droplet. However it doesn't seem to be possible (at least for me), as the massFlowRateProfile needs two...
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Forum: OpenFOAM Running, Solving & CFD
June 27, 2008, 06:39
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Replies: 98
Views: 18,742
Thank you for your answer Mr N
Thank you for your answer Mr Nordin.
I'll implement your suggested correction and post my results here.
With kind regards,
Sebastian Vogl
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